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45results about How to "Easy to diversify" patented technology

Internet-of-Things based multiparameter online water quality monitoring system and implementation method

The invention relates to an Internet-of-Things based multiparameter online water quality monitoring system and an implementation method. The monitoring system comprises a plurality of water quality detection gateways, a local server, a cloud server and a smart phone. Each water quality detection gateway is connected with a plurality of bus-type water quality sensing modules and a plurality of wireless water quality sensing modules. Each water quality detection gateway is connected with the local server through the Ethernet, connected with the cloud server through the wireless wide area network, connected with the smart phone through Bluetooth, connected with the bus-type water quality sensing modules through RS485 buses, and connected with the wireless water quality sensing modules throughWSNs (wireless sensor networks). Each of the bus-type water quality sensing modules is connected with a multiparameter water quality sensor, and each of the wireless water quality sensing modules isconnected with the corresponding multiparameter water quality sensor. The water quality detection gateways of the monitoring system are connected with the water quality sensors through the RS485 fieldbuses and the WSNs, data query and system parameter configuration can be performed in multiple ways, and accordingly, the monitoring system is flexible, convenient and rapid to use.
Owner:HEBEI UNIV OF TECH

Intelligent product specification management system based on Internet

InactiveCN105868962AEffectively promote continuous optimization and updateCutting costsMultimedia data queryingOffice automationNetwork connectionSystems management
The invention discloses an intelligent product specification management system based on the Internet, and the system mainly comprises an information management platform and a mobile intelligent terminal. The information management platform is used for managing a product specification, and is connected with the mobile intelligent terminal through a network, wherein the information management platform comprises a core function module and a base module. The base module serves as the bottom support for the core function module, and comprises a base information module and a system management module. The core function module comprises a specification formulating module, a specification modifying module, a specification exporting module, a specification training module, and a conversation forum module. The mobile terminal takes a Webservice interface as a carrier, and achieves the data interaction with the information management platform through a wireless network. The mobile intelligent terminal mainly comprises a specification obtaining module, a specification query module, and a specification management module.
Owner:郭玥瑶 +4

Method for preparing polyester through using 10-hendecenoic acid and vanillic acid

A method for preparing polyester through using 10-hendecenoic acid and vanillic acid is characterized in that bulk polymerization is realized with vegetable oil based unsaturated fatty acid and vanillic acid as raw materials and n-butyl titanate as a catalyst under high-temperature high-vacuum conditions, and comprises the following steps: 1, preparing 11-(3-hydroxypropylmercapto)-undecenyl-1-ol from 10-hendecenoic acid; 2, preparing dimethyl vanillate from methyl vanillate; and 3, preparing degradable polyester from 11-(3-hydroxypropylmercapto)-undecenyl-1-ol and dimethyl vanillate. The method has the advantages of wide sources and low prices of the raw materials, regenerability and low production cost; the synthetic technology of polyester has the advantages of simplicity, easy operation, environmental protection, high yield, and benefiting for the industrialized production; and the prepared polyester material has the advantages of good thermal stability, adjustable performances, easy realization of the structural and functional diversification, realization of the performances comparable to the petroleum raw material based polyester, and possible large-scale production.
Owner:NANKAI UNIV

A proton-exchange film fuel battery electrocatalyst and its preparing and application

The invention relates to an electric catalyst of proton exchange membrane fuel battery and relative production, wherein it uses one or several metal carbonates or nitrides of IIIb, IVb, Vb, VIb, VIIb, VII and Ib groups of the Periodic System, or the transition metal oxide MxOy as active components; the content of active component is 10-70% of catalyst content; the left is carrier; the active component contains at least one of nitrides of molybdenum and tungsten, while their total contents are 10-60% of catalyst. The inventive catalyst can represent better O2 reduction activity, and it can reduce the CO adsorption on Pt, and accelerate the CO oxidization on Pt.
Owner:SUNRISE POWER CO LTD

Plastic micro-channel pipeline structure, and preparation method and device thereof

The invention discloses a plastic micro-channel pipeline structure, and a preparation method and device thereof. The pipeline structure adopts a hollow pipeline, wherein a plurality of micro-channels are uniformly formed at the circumference of the wall surface of the pipeline around a central through hole. The micro-channel structure has a larger specific surface area, greatly strengthens the mass transfer and heat transfer performance per se. The preparation device comprises a driving motor, a hopper, an extruder barrel, a data acquisition control system, an extruder head, a cooling water trough and a traction winding device, wherein the output shaft of the driving motor is connected with the tail part of a screw bolt in the extruder barrel through a belt wheel; the hopper is fixed above the tail part of the extruder barrel; the extruder head is fixedly connected with the front end of the extruder barrel; the cooling water trough and the traction winding device are sequentially arranged above the extruder head. According to the invention, the advantages of easiness in operation, high production efficiency and low cost are achieved.
Owner:ZHEJIANG UNIV +1

Indoor skiing and skiing protection integrated device for children

The invention discloses an indoor skiing and indoor skiing protection integrated device for children, comprising a base, a skiing frame, lifting oil cylinder groups, a protection unit and a flat-platetransporting ladder. One end of the base is provided with a front mounting shaft, and the other end of the base is provided with a first lifting oil cylinder group. The skiing frame includes an obliquely arranged bottom flat plate, one end of the bottom flat plate is hinged to the front mounting shaft, and the other end of the bottom flat plate is connected to the top of the first lifting oil cylinder group. The angle of the bottom flat plate can be adjusted under driving effect by the first lifting oil cylinder group. The integrated device is simple in structure and convenient to use, and can be used for a plurality of years regardless of region, climate and seasons. The overall gradient of the skiing frame can be adjusted by the arrangement of the lifting oil cylinder groups, and thus training diversity is facilitated. Through arrangement of the protection unit and the flat-plate transporting ladder, the integrated device is safe and reliable, comprehensive in protection measure, suitable for children to use, is convenient for improving the interest of children and is conducive to improving the physical quality of children.
Owner:裴海泓

Biodegradable nontoxic amphipathic multi-block polyurethane material and preparation thereof

ActiveCN101503501BUnique amphipathic natureAvoid devouringGene deliveryBiocompatibility Testing
The invention provides a biodegradable nontoxic amphiphilic multi-block polyurethane material which is formed by alternately copolymerize soft segments composed of polymer diol and hard segments composed of diisocyanate and a chain extender. Weight-average molecular weight of the biodegradable nontoxic amphiphilic multi-block polyurethane material is 5,000-100,000. The invention further provides a method for preparing the biodegradable nontoxic amphiphilic multi-block polyurethane material. The polyurethane material has a unique multi-block structure and amphiphilicity, can form a stable self-assembly micellar structure in water and easily introduces active sites at a main chain, a side chain and chain ends of polyurethane for molecular modification, and structure and performance of the polyurethane material is controllable. In addition, the polyurethane material has good biocompatibility and biodegradability with nontoxic degradation products, thus having wide application prospect inthe biomaterial field, especially in the field of polymer drug and gene delivery fields.
Owner:SICHUAN UNIV

Inductive key and electronic device with same

The invention relates to an inductive key which comprises an inductive key board and a light source arranged on the inductive key board. The front face of the inductive key board is provided with a non-inductive area and a plurality of inductive areas; the light source protrudes out of the front face of the inductive key board, a light guide film is arranged on the front face of the inductive key board, and the light guide film is provided with a reflection pit area. Light rays emitted by the light source are projected to the light guide film along the direction parallel to the light guide film, and the direction of propagation is changed by the reflection pit area. The invention also provides an electronic device with the inductive key. The inductive key and the electronic device with the same provided by the invention can realize diversified light shaping effects without arranging light holes in the inductive key board, so that the inductive key is easily beneficial to being thinned, and the cost is reduced.
Owner:HISENSE VISUAL TECH CO LTD

JCD integrated device based on N-type epitaxy and preparation method thereof

The invention provides a JCD integrated device based on N-type epitaxy and a preparation method thereof, and belongs to the technical field of power semiconductor integration. The high-simulation precision JFET part, the CMOS part with high integration degree, convenient logic control and low power consumption and the high-voltage control DMOS part with the high switching speed are integrated on the same chip for the first time, so that the chip has the system function. At the same time, passive components such as poly capacitors, poly resistors and poly diodes can be integrated with the chipto form a circuit. Such a rich device type can bring great flexibility to the power circuit design. The overall process uses fewer masks, the process level reusability is strong, and the manufacturingcost control can be facilitated. High and low voltage compatibility, high performance, high efficiency and high reliability are achieved on the limited chip area. The chip made by using the JCD integration technology has better comprehensive performance and is favorable for development of the one-chip power system integration.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Preparation method of instant-dissolving type effervescent salt tablet

The invention discloses a preparation method of an instant-dissolving type effervescent salt tablet. The instant-dissolving type effervescent salt tablet is composed of sodium chloride, an adhesive, auxiliaries, an acid source, an alkali source and a lubricant. The preparation method comprises the following steps: putting the sodium chloride into a stirrer, adding the acid source and a proper amount of auxiliaries and lubricant and evenly stirring; then adding the adhesive, evenly stirring and feeding the materials into a kneader for kneading, crushing and drying so as to obtain a mixed material; pouring the alkali source into a mortar, adding the rest of auxiliaries, evenly mixing the alkali source with the auxiliaries and then stopping grinding, and drying and screening the obtained material so as to obtain a mixed material; evenly mixing the two mixed materials in a mixer, tableting, trimming the tablets and screening the tablets after the even mixing; and finally, packaging. The instant-dissolving type effervescent salt tablet can be rapidly dissolved in water, i.e., about 7.5g of salt can be completely dissolved in 100mL of water at 50 DEG C only within 1 minute under the condition that the stirring is not carried out, so that the application efficiency of the effervescent salt tablet is improved.
Owner:河南省盐业总公司 +2

Business state set and display method and device based on business logic

The invention relates to the technical field of network analysis and provides a business state set and display method and device based on business logic. The business state set and display method and device aim at solving the problems in the prior art. In a Web page, results of application performance states and application key indexes are shown through logic diagrams, so that a user can do relevant analysis on business in the network in a more various, more virtual and more accurate mode. User application performance states can be divided regionally by an application performance state bar, each application performance state is provided with three parameter expressions, and each parameter is provided with a plurality of time blocks to represent the performance states. Each host can be correspondingly connected with a host in a business logic diagram, and an application can be correspondingly connected with a business application in the business logic diagram. In an application key index display step, a probe can grab all data packets, and data corresponding to an application ID key parameter can be displayed reversely when a key parameter index of an appointed application ID is chosen through an application key index webpage.
Owner:科来网络技术股份有限公司

Printed circuit board, manufacturing method thereof and electronic device

The invention relates to the technical field of communication, in particular to a printed circuit board and a manufacturing method thereof. The printed circuit board comprises a first circuit board enabling a flexibility parameter after etching to serve as a first parameter and a second circuit board enabling a flexibility parameter after etching to serve as a second parameter. The manufacturing method comprises the steps of respectively performing etching on the first circuit board and the second circuit board according to a preset circuit pattern; and enabling the etched first circuit board to be connected with the etched second circuit board. According to the printed circuit board, the manufacturing method of the printed circuit board and an electronic device, the first circuit board and the second circuit board are respectively cut into corresponding shapes according to the preset circuit pattern after undergoing press fit, and the cut first circuit board and the cut second circuit board are connected. Due to the fact that the formed circuit board has a certain elasticity, the anti-breaking capability is high; besides, the formed circuit board can be bent randomly, and diversification of electronic product forms is facilitated. In addition, the cost of the formed circuit board is lower than that of the first circuit board, and device adhesion to two sides can be achieved.
Owner:LENOVO (BEIJING) LTD

JCD integrated device integrated with VDMOS and preparation method thereof

The invention provides a JCD integrated device integrated with VDMOS and a preparation method thereof, and belongs to the technical field of power semiconductor integration. The manufacturing of JFET,CMOS and VDMOS on the same chip is realized by the invention for the first time; meanwhile, passive elements such as a poly capacitor, a poly resistor and a poly diode can be integrated with the JFET, CMOS and VDMOS to form a circuit. The advantages of high-switch speed and high voltage resistance of the VDMOS, excellent simulation characteristics, low-noise characteristics, temperature stabilityand anti-radiation capability of the JFET devices, high integrality of the CMOS part and the like are integrated by the invention; meanwhile, high flexibility is brought to the power circuit design.The whole process provided by the invention uses relatively few mask templates; the process level reusability is high; the manufacturing cost control is facilitated; the high-low-voltage compatibility, high performance, high efficiency and high reliability are realized on a limited chip area; the chip manufactured by using the JCD integration technology has good comprehensive performance and is favorable for the development of the single chip power system integration.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Organic light-emitting device and manufacture method thereof

The invention relates to an organic light-emitting device and a manufacture method thereof. The organic light-emitting device comprises a glass substrate (1), a transparent conductive film layer (2), an organic light-emitting layer (3) and a metal electrode layer (4) from bottom to top. A rough region (6) is formed on the glass substrate (1), and the metal electrode layer (4) penetrates through the organic light-emitting layer (3) from the rough region (6) to be connected with the transparent conductive film layer (2) under the organic light-emitting layer (3). The organic light-emitting device has the advantages that no organic and metal mask plates is needed when the device manufactured by the method leading electrodes through the rough region (6), cost on manufacture, clean, maintenance, storage and the like of the expensive organic and metal mask plates can be reduced, the structure of a vacuum evaporation device is simplified, product specifications cannot be limited by types of the mask plates, and diversification of the product can be achieved.
Owner:江苏壹光科技有限公司

Method for preparing modified PBS copolyester by using camphor alcohol

The invention relates to a method for preparing modified PBS copolyester by using (1S, 3R)-(1)-cis-1, 2, 2-trimethylcyclopentane-1, 3-dimethanol (TCDM). PTS polyester, random PBS copolyester and block PBS copolyester are prepared under the conditions of high temperature and high vacuum by using camphoric acid as a raw material and tetrabutyl titanate as a catalyst. The preparation method comprises the following steps: (1) preparing (1S, 3R)-(1)-cis-1, 2, 2-trimethylcyclopentane-1, 3-dimethanol (TCDM) from camphoric acid; 2) preparing PTS polyester from the TCDM; 3) preparing a random PBS copolyester from the TCDM; 4) preparing the block PBS copolyester from PBS and PTS. The method disclosed by the invention has the advantages that the rigid alicyclic diol is extracted from natural camphor and has high reaction activity, rigidity and better thermal stability. Raw materials are wide in source and low in price; the polyester synthesis process is simple, green and environment-friendly, and is beneficial to industrial production; the prepared modified PBS copolyester material is good in thermal stability, structural and functional diversification is easy to realize, and the performance can be comparable with that of polyester based on a petroleum raw material. The polyester material is degradable, does not cause white pollution, and meets the environmental protection requirement.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY

Full-automatic rotary curved surface drawing machine

The invention relates to a full-automatic rotary curved surface drawing machine. The drawing machine is characterized by comprising a machine frame, a clamping and rotating device and a swing drawingdevice, wherein the clamping and rotating device is arranged on the machine frame; the clamping and rotating device comprises a clamping motor and a clamping component, the swinging drawing device comprises a swinging motor, a swinging arm and a drawing pen; the clamping component is provided with a clamping structure, so as to clamp the workpiece; the power output end of the clamping motor is connected with the power input end of the clamping component, so as to drive the workpiece clamped by the clamping component to rotate to form a driving workpiece rotating structure; the swinging arm isarranged on a rotating shaft of the swinging motor, a rotary driving structure is formed, and the drawing pen is installed on the swinging arm to form a rotary type curved surface drawing structure which rotates along with the driving swinging arm. The problems that the existing process product hand-made is high in manufacturing cost, long in drawing time and low in efficiency can be solved, the full-automatic rotary curved surface drawing machine has the outstanding substantive characteristics of low manufacturing cost, short drawing time, high efficiency, easiness in diversification and thelike.
Owner:广州市高级技工学校

Forward flow control work multi-way valve structure

ActiveCN107504002ARealize fine allocationFlexible allocation modelServomotor componentsTraffic capacityPower flow
The invention discloses a forward flow control work multi-way valve structure. The forward flow control work multi-way valve structure is characterized by comprising a proportional electromagnetic valve A (1), an unloading valve (2), a proportional electromagnetic valve B (3), a confluence valve (4) and a pressure reducing valve (5). Pilot inlet and return oil is connected with inlet and return oil of the proportional electromagnetic valve A (1). A control cavity of the proportional electromagnetic valve A (1) is connected with a valve element control cavity of the unloading valve (2). Inlet and return oil of the unloading valve (2) is connected with inlet oil and main return oil of a variable pump. Pilot inlet and return oil of the pressure reducing valve (5) is connected with inlet and return oil of the proportional electromagnetic valve B (3). A control cavity of the proportional electromagnetic valve B (3) is connected with a valve element control cavity of the confluence valve (4). Inlet and return oil of the confluence valve (4) is connected with inlet oil and main return oil of a metering pump. By means of the forward flow control work multi-way valve structure, flow distribution of a branch way can be controlled by controlling power supply currents of the electromagnetic valves, and accurate flow distribution control is achieved.
Owner:XIAN FLIGHT SELF CONTROL INST OF AVIC

Five-membered heterocycle modified 4'-spiro nucleoside compounds and application in virus resistance

The invention belongs to the field of medicinal chemistry, and in particular relates to five-membered heterocycle modified 4'-spiro nucleoside compounds which are synthesized by 1,3-dipolar cycloaddition reaction of 4',5'-double-bond nucleoside and 1,3-dipolar body and have diversified structures. Because the compounds have special physiological activity and biological functions, the compounds can be applied in anti-Coxsackie viruses. The raw materials are easily available, the reaction conditions are mild, the operation is simple, the application range of the substrate is wide, the products are easily diversified, the yield is high (50 to 98 percent), and the compounds have the advantages of high efficiency, high region selectivity and high stereo selectivity.
Owner:JILIN UNIV

Method for preparing modified PEF copolyester from citric acid-based aromatic diester

The invention relates to a method for preparing modified PEF copolyester by using 2, 3-diphenyl-diethyl terephthalate, which is used for preparing the PEF copolyester by using dimethyl acetone dicarboxylate and cinnamyl aldehyde as raw materials and zinc acetate and antimonous oxide as catalysts under the conditions of high temperature and high vacuum, and comprises the following steps: 1) preparing the 2, 3-diphenyl-diethyl terephthalate from the diethyl acetone dicarboxylate; and 2) preparing the modified PEF copolyester from the 2, 3-diphenyl-diethyl terephthalate. The preparation method has the advantages that the PEF polyester is wide in raw material source, low in price, renewable and low in production cost; the PEF polyester modification synthesis process is simple, easy to operate,environmentally friendly, high in yield and beneficial to industrial production; the prepared modified PEF copolyester material is good in thermal stability and adjustable in performance, structure and function diversification is easy to achieve, the performance of the modified PEF copolyester material can be comparable with that of polyester based on petroleum raw materials, and the modified PEFcopolyester material has the possibility of large-scale production.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY

Artistic bed

InactiveCN104622083ASet in timeConveniently located inSofasCouchesEngineeringHead of bed
The invention discloses an artistic bed, which comprises a headboard, a footboard and a horizontally arranged square bed plate, wherein the headboard comprises first bed legs, a backrest rod and a backrest plate; the footboard comprises second bed legs, a footboard rod and a footboard plate; the bed plate is movably connected with the headboard and the footboard respectively; background picture layers or tubesheets are arranged on the backrest plate and the footboard plate; the tubesheets are punched by a mold; the background picture layers can be sprayed and painted; and patterns can be randomly treated according to the aspiration, and are high in selectivity. The bed can meet the individual needs and artistic pursuit of a user, and is low in production cost and high in production efficiency.
Owner:李如武

A printed circuit board and its manufacturing method and electronic device

The invention relates to the technical field of communication, in particular to a printed circuit board and a manufacturing method thereof. The printed circuit board comprises a first circuit board enabling a flexibility parameter after etching to serve as a first parameter and a second circuit board enabling a flexibility parameter after etching to serve as a second parameter. The manufacturing method comprises the steps of respectively performing etching on the first circuit board and the second circuit board according to a preset circuit pattern; and enabling the etched first circuit board to be connected with the etched second circuit board. According to the printed circuit board, the manufacturing method of the printed circuit board and an electronic device, the first circuit board and the second circuit board are respectively cut into corresponding shapes according to the preset circuit pattern after undergoing press fit, and the cut first circuit board and the cut second circuit board are connected. Due to the fact that the formed circuit board has a certain elasticity, the anti-breaking capability is high; besides, the formed circuit board can be bent randomly, and diversification of electronic product forms is facilitated. In addition, the cost of the formed circuit board is lower than that of the first circuit board, and device adhesion to two sides can be achieved.
Owner:LENOVO (BEIJING) LTD

Alloy for cutter ring of disk type hobbing cutter and preparation method thereof

The invention relates to an alloy for a cutter ring of a disk type hobbing cutter, which comprises the following components in percentage by mass: 0.4-0.46% of C, 0.45-1.0% of Si, 0.48-0.74% of Mn, 1.3-5.4% of Cr, 0.4-1.4% of Mo, 0.86-1.33% of V, 0.06-0.54% of Nb, 0-0.05% of Al, 0-3% of Ni, no more than 0.009% of S, no more than 0.03% of P and the balance of Fe. The preparation method comprises the following steps: performing vacuum induction smelting on the raw materials, casting, forging, performing spheroidal annealing, performing gas carburization, performing vacuum quenching, and performing double tempering. The carburized layer of the prepared cutter ring of a disk type hobbing cutter is 1mm thick, the surface hardness of the carburized layer can be up to 60-63HRC, the internal average hardness is higher than 55HRC, and the impact toughness aku is up to 15-22J / cm<2>; and the shield cutter ring is high in hardness and favorable in toughness.
Owner:ZHUZHOU HARD ALLOY GRP CO LTD +1

Plastic micro-channel pipeline structure, and preparation method and device thereof

The invention discloses a plastic microchannel pipeline structure, a preparation method and a device. The plastic microchannel pipeline structure is a hollow pipeline, and a plurality of microchannels are evenly arranged on the wall surface of the pipeline around a central through hole along the circumference, and the microchannel structure has a large specific surface area. , which greatly strengthens the mass transfer and heat transfer performance of the structure itself; the preparation device of the microchannel pipeline structure includes a driving motor, a hopper, an extruder barrel, a data acquisition control system, an extruder head, a cooling water tank and a traction collection Coil device; the output shaft of the driving motor is connected to the tail of the screw in the extruder barrel through a pulley, the hopper is fixed above the tail of the extruder barrel, and the extruder head is fixedly connected to the front end of the extruder barrel , the cooling water tank and the traction and winding device are sequentially arranged in front of the extruder head; the invention is easy to operate, high in production efficiency and low in cost.
Owner:ZHEJIANG UNIV +1

Lithium battery diaphragm conductivity testing device

The invention discloses a lithium battery diaphragm conductivity testing device which comprises a first testing mechanism, a second testing mechanism, a third testing mechanism and a testing platform, and the first testing mechanism, the second testing mechanism and the third testing mechanism are installed on the testing platform. The lithium battery diaphragm conductivity testing device is compact in structure and ingenious in design, conductivity testing can be conducted on the folded diaphragm through the first testing mechanism, conductivity testing can be conducted on the surrounding diaphragm through the second testing mechanism, and the third testing mechanism can test the diaphragm under stretching rotation and under the condition that the stretching force is changed. Diversification of tested diaphragm conductivity information is increased, accuracy of diaphragm conductivity test data is achieved, diaphragm test efficiency can be improved, and time is saved.
Owner:JIANGXI RUIDA NEW ENERGY TECH CO LTD

Method for preparing degradable polyester based on 10-undecenoic acid and vanillic acid

The invention provides a preparation method for degradable polyester from 10-undecenoic acid and vanillic acid. According to the invention, plant oil-based unsaturated fatty acid and vanillic acid are used as raw materials, n-butyl titanate is used as a catalyst, and bulk polymerization is realized under the conditions of a high temperature and high vacuum. The method comprises the following steps: 1) preparing 11,11'-(ethyl-1,2-disulfur)bishendecene-1-ol from 10-undecenoic acid; 2) preparing dimethyl vanillate from methyl vanillate; and 3) preparing degradable polyester from 11,11'-(ethyl-1,2-disulfur)bishendecene-1-ol and dimethyl vanillate. The invention has the following advantages: the raw materials are easily available and cheap, and production cost is low; synthetic process for polyester is simple, easy to operate, green and environment-friendly, has high yield and is favorable for industrial production; a prepared polyester material has good heat stability, can easily realize diversification of structures and functions, has performance comparable with polyester prepared from the raw material petroleum and can be produced on a large scale.
Owner:NANKAI UNIV
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