69results about How to "Polymerization reaction conditions are mild" patented technology

The invention discloses a preparation method of polyene ether compounds. The method includes: organic small-molecule 4-dimethylamino pyridine (DMAP) is used as the catalyst, binary alkynyl compounds and binary hydroxy compounds are mixed with organic solvent, and the polyene ether compounds are obtained by using the click polymerization reaction of alkynyl-hydroxy. The polyene ether compounds comprise an inner unit indicated by formula (I). The polymerization step is showed in the formula (V), wherein n is larger than 1, and R1 and R2 are selected from organic groups. The method has the advantages that water and oxygen do not need to be removed during reaction, polymerization temperature is low, polymerization efficiency is high, and no metal residues exist in products; the prepared polyene ether compounds are high in steric regularity, good in machinability, and high in heat stability, degradability and aggregation-induced emission performance.

The invention discloses hyperbranched polytriazole formate as well as a preparation method and application thereof. The preparation method of hyperbranched polytriazole formate comprises the following steps: firstly, synthesizing binary azide containing a tetraphenyl ethylene unit; then synthesizing a ternary ester compound containing alkynyl based on ternary alcohol and propiolic acid as raw materials; and finally, carrying out non-metal-catalytic 'click' polymerization reaction under the heating condition in a polar solvent by utilizing the azide and the alkynyl-containing ester compound soas to obtain a target polymer in high yield. The hyperbranched polytriazole formate prepared by using the method is high in 1,4-stereoregularity, good in workability and high in thermal stability, degradability, illumination patterning and aggregation-induced emission property. The invention also discloses application of hyperbranched polytriazole formate in detection of a polynitroarene explosive.

The invention discloses a cationic hydrogel material and a preparation method thereof. The cationic hydrogel material comprises the following constituents in parts by weight: 55-70 parts of distilled water, 25-40 parts of a cationic polymer, 1-5 parts of a cross-linking agent, 0.5-2 parts of a cross-linking auxiliary, 0.2-2 parts of a base modifier, and 0-6 parts of acid modifier. The preparation method comprises the following steps: weighing the distilled water and putting the distilled water in a beaker, adding the cationic polymer in the beaker, stirring the mixture in the beaker at the room temperature until dissolving, adding the cross-linking agent to the beaker, adjusting the pH value of the solution, heating and stirring the solution until the cross-linking agent is completely dissolved, adding the cross-linking auxiliary, after uniform mixing, adjusting pH value of the solution to be 8-9, using a piece of preservative film to cover the mouth of the beaker, placing the beaker in a constant-temperature water bath at 50-80 DEG C to conduct a cross-linking reaction for 24 hours, obtaining the hydrogel, using deionized water to repeatedly soak the hydrogel, removing inorganic ions therein, drying with air flow and crushing, and at last obtaining the product. The preparation method disclosed by the invention can flexibly and effectively adjust the properties of the cationic hydrogel, and is low in production cost; the synthetic process is simple and feasible.

The invention provides a formula and a preparation method of a cationic polymer. The raw material formula of the cationic polymer comprises the following components in part by weight: water 5-50, acetone 3-25, amine 5-30, aldehyde 5-40, alkaline regulator 3-12 and acidic regulator 5-20. In the method, a water soluble cationic polymer is prepared from aldehyde, acetone and amine by a nucleophilic addition reaction, an aldol condensation reaction and a Michael addition reaction in the presence of acid and alkali catalysts in turn and by a two-step feeding process. The method has the advantages that: the raw material cost is low, the synthesis process is simple and easy to implement; the preparation conditions are mild and safe; and the obtained product has high cation content and has high decolorizing and flocculating effects on anionic dye waste water.

The invention relates to the thermoplastic elastomer technology, aims to provide multi-block branched polyethylene and a preparation method thereof and further provides an application of polyethylene. The multi-block branched polyethylene is formed by alternately connecting semi-crystalline low-branching-degree polyethylene chain segment used as a hard segment and an amorphous high-branching-degree polyethylene chain segment used as a soft segment in a soft segment-hard segment-soft segment-hard segment connection manner. During preparation, only vinyl monomer is used as a raw material, and the production cost is low; only one catalyst is needed, the matching problem of two catalysts is not required to be considered, the production process is greatly simplified, and the method is suitable for mass industrial production. A chain shuttle reaction is performed between two identical metal activity centers in molecules, the advantages of high efficiency and quickness are realized, the chain structure and composition of a polymerized product are uniform, the polymerization reaction adopts mild condition and is not required to be performed at the high temperature, and energy consumption is substantially reduced.

The invention discloses a one-step synthetic method of degradable branched polyester, and belongs to the technical field of polymer synthesis. According to the method, a reactive monomer comprises internal ester, anhydride, cyclic carbonate and the like; a self-initiated monomer comprises acrylic acid hydroxy ester and a methacrylic acid hydroxy ester compound, and a catalyst is a phosphine nitrile alkali compound structurally containing a double bond in which P is equal to N. The one-step synthetic method has the advantages that all raw materials for the polymerization reaction are commercialized and the conditions of the polymerization reaction are mild, is suitable for industrialized production, has an excellent application prospect, and is mainly used for the technical field of the polymer synthesis.

The invention discloses an agricultural microbial agent microcapsule based on cell membrane mimicking and a preparation method thereof. The effect of regulating the osmotic pressure of cells is realized by regulating the moisture content of microbial cells and the flux of oxygen; and the wall material of the microcapsule is selected from gamma-polyglutamic acid (gamma-PGA), a polysaccharide material and dopamine. The gamma-PGA can achieve a synergistic effect with a microbial agent so as to enhance the antioxidant ability of plants, alleviate damage to plants under abiotic stress and promote plant growth, and is a typical microorganism-derived biostimulant; and a compact film formed by auto-polymerization of the dopamine on the surfaces of bacteria can effectively relieve the influence ofexternal osmotic pressure on the bacteria in the microcapsule, and polymerization reaction conditions are mild and have small damage to the bacteria. The preparation method disclosed by the inventionis based on a cell surface polymerization technology, and can realize single-cell coating of the microbial agent and inhibit proliferation of the microbial agent.

The present invention discloses a polyimidazole compound, an in-situ preparation method and applications thereof, wherein a binary isocyano compound is subjected to a cyclization polymerization reaction in an organic solvent under the action of a cyclization polymerization catalyst to obtain the polyimidazole compound. According to the present invention, the imidazole unit in the prepared polyimidazole compound is formed by carrying out in-situ polymerization on the imidazole-unit-free monomer so as to make up the gaps in the prior art; the cyclization polymerization reaction is the one-component polymerization reaction, the monomer ratio is not required to be considered, the process is simple, the reaction raw materials and the catalyst are easy to obtain, the polymerization reaction conditions are mild, the polymerization can be performed at the room temperature, and the energy source is saved; and the polymerization efficiency of the polymerization reaction is high, the high molecular weight polymer can be obtained after the reaction is performed for a short time, the polymerization reaction has excellent region selectivity and excellent stereoselectivity, no by-product is generated during the polymerization process, and the atom economy is met.

The invention discloses a preparation method of polyvinylene sulfide. The preparation method comprises the following step of performing click polymerization reaction on a binary alkynyl compound and a binary mercapto-compound in an organic solvent to obtain the polyvinylene sulfide. The obtained polyvinylene sulfide comprises an internal unit shown in a formula (I), the step of polymerization is shown in a formula (IV), wherein n is more than 1 and is selected from organic groups. The preparation method does not need heating or any catalyst, is simple and efficient in process, and has excellent space selectivity. The invention also discloses the polyvinylene sulfide obtained through the preparation method, and the polyvinylene sulfide has good workability and film-forming property, high heat stability and refractive index and aggregation induced luminescent property.

The invention relates to a preparation method of cage type n-propyl oligomeric silsesquioxane. N-propyl triethoxy silane or n-propyl trimethoxy silane is utilized as a raw material and alcohol serves as a solvent. The method includes performing hydrolytic condensation reaction under catalysis of concentrated hydrochloric acid of 36-38 wt% to prepare the cage type n-propyl oligomeric silsesquioxane with 8 n-propyls. The preparation method is convenient to operate, the raw material is easy to obtain, the polymerization reaction is mild in reaction condition and easy to control, and the product is high in yield, low in cost and small in pollution.

The invention belongs to the technical field of organic high-molecular photoelectric materials and discloses an alkyne-ketone intermediate based conjugated high-molecular polymer as well as a multi-component tandem polymerization based preparation method and application thereof. The preparation method of the conjugated high-molecular polymer comprises the following steps: carrying out coupling reaction on aryl diyne and aryl diacyl chloride under the co-catalysis of Pd and Cu (I) and the presence of an acid-binding agent to generate an alkyne-ketone oligomer; then adding a nucleophile in situ, and carrying out tandem reaction to generate a conjugated polymer in the second step; and settling the polymer solution obtained after reaction in a poor solvent, collecting, and drying to obtain the conjugated high-molecular polymer. The preparation method provided by the invention has the advantage of mild polymerization reaction condition, and the polymerization reaction can be carried out in room temperature efficiently. In addition, the polymerizing monomers are simple and are easy to obtain, and the polymer is high in yield and molecular weight and has high stereoselectivity, high atom economy and good film forming performance. The obtained conjugated high-molecular polymer has special photoelectric performance and can be widely applied to the field of biological and chemical fluorescence detection.

The invention provides an atom transfer radical polymerization method which comprises the following steps: mixing a monomer, an initiator, a ligand and a catalyst under an electrochemical initiation condition, and producing an atom transfer radical polymerization reaction to obtain a polymer, wherein the electrochemical initiation voltage is 0.5V-36V. According to the method, an oxidation-reduction process in a polymerization reaction system is controlled through an electrochemical method, and the polymerization reaction is initiated through controlling the electrochemical initiation voltage, so that the dynamics of the polymerization reaction and the molecular weight of the polymer are controlled and the monomer conversion rate in the polymerization reaction process is relatively high; and in the polymerization reaction, the usage amount of the catalyst is very low and the polymerization reaction condition is mild. Therefore, the method has a very good industrialization prospect.

The invention relates to the field of organic polymer chemistry, and specifically relates to a siloxane copolymer containing ethyl phenyl silica chain links and a preparation method thereof. The preparation method comprises the following steps: taking ethyl phenyl dialkoxysilane and dimethyl dialkoxysilane as the raw materials, carrying out hydrolysis condensation reactions in the presence of an anionic type or cationic type hydrolysis catalyst to generate oligomer composed of ethyl phenyl silica chain links and dimethyl silica chain links, then mixing the obtained oligomer with end-capping reagents with different structural types, carrying out reactions in the presence of an anionic type or cationic type polymerization catalyst, and subjecting the reaction products to neutralization / catalyst decomposition and reduced pressured distillation to remove low-boiling-point substances so as to obtain poly(dimethyl-ethylphenyl)siloxane copolymer with ends capped by different functional groups. The species of the monomer used in the provided method are few, the polymerization reaction conditions are mild, the reaction process control is simple, the copolymer structure is uniform, and the performance of the copolymer is excellent, and the provided method is suitable for massive industrial production.

The present invention discloses a temperature-resistant and salt-resistant polymer oil displacement agent and a preparation method thereof, wherein the temperature-resistant and salt-resistant polymer oil displacement agent is formed by polymerizing acrylamide, allyl polyethylene glycol, sodium p-styrene sulfonate, and dimethyl allyl octadecylammonium chloride according to a molar ratio of (94-97):(1.7-4.7):(0.3-1.0):(0.3-1.0). According to the present invention, the polymer oil displacement agent can maintain good tackifying effect at a high temperature in a salt solution having a certain concentration, and has characteristics of good temperature resistance, good salt resistance, good shear resistance, low raw material monomer cost, mild polymerization reaction condition, and simple process.

The invention belongs to the field of synthesis of copolyester, and particularly relates to a synthesis method of the copolyester. The synthesis method comprises the step of catalyzing copolymerization reaction of two monomers such as a hydroxyl acrylate-containing monomer and a cyclic monomer through small organic molecules to obtain the degradable copolyester with a brand-new structure. The hydroxyl acrylate-containing monomer comprises hydroxyethyl acrylate and hydroxyethyl methylacrylate as well as a derivative thereof; the cyclic monomer comprises an epoxy monomer and a lactone monomer. The epoxy monomer comprises ethylene oxide, epoxypropane, allyl glycidyl ether and the like; the lactone monomer comprises butyrolactone, caprolactone, lactide and the like. A polymerization mode for hydroxyl acrylate in the method is carried out in a proton transfer manner instead of conventional vinyl addition, thereby obtaining polyester with a special structure. Raw materials used in the methodare readily available and are economical and environmentally friendly; reaction conditions are mild, and the reaction rate is high; different functional groups can be introduced into the polyester, so that the application range is expanded; the method has an extremely good application prospect.

The invention belongs to the field of macromoleclar polymerization and relates to a method for preparing a branched polymer by using a vinyl benzene monomer containing polymerizable double bonds and chain transfer sulfydryl. In the method, vinyl benzyl sulfydryl propionate serving as a functional monomer and a vinyl monomer such as vinyl benzene undergo polymerization at 60 to 135 DEG C in methylbenzene, benzene or dimethylbenzene serving as a solvent in the presence of azodiisobutyronitrile (AIBN) serving as an initiator to form the branched polymer successfully. The branch degree of the branched polymer can be regulated by regulating the molar ratio of the branched monomer and the polymer monomer, polymerization temperature and polymerization time. In the method, the vinyl benzyl sulfydryl propionate with high storage stability is used as the branched monomer to form the branched polymer under a conventional free radical polymerization condition successfully, the polymerization conditions are mild, the operation is simple and easy to implement, the monomer conversion rate is high, and the degree of branching of the polymer is controllable; and the method has high adaptability for synthesizing branched polymers by using various monomers.

The invention relates to an ultra-high molecular weight poly(4-alkoxystyrene) and a preparation method thereof. The ultra-high molecular weight poly(4-alkoxystyrene) is of a structure as shown in a formula (I), wherein R is methyl or ethyl; and the weight-average molecular weight is not less than 1 million. The provided ultra-high molecular weight poly(4-alkoxystyrene) has the weight-average molecular weight of not less than 1 million, and better mechanical properties, thermal stability, and hydrophilic properties are realized comparing with commercial polystyrene .

The invention provides a norbornene imide heat-resistant polymer porous material and its preparation method. The method comprises the following steps: Step 1, a norbornene imide monomeric compound is prepared from norbornene anhydride and a multi-element organic amine compound by a one-step method or a two-step method, and the norbornene imide monomeric compound is purified; Step 2, the purified product obtained from the step 1 is dissolved in an organic solvent b, temperature is maintained at minus 10-100 DEG C, a Grubbs catalyst is added to carry out a polymerization reaction at the reaction temperature of minus 10-120 DEG C for 5 minutes-2 weeks; and Step 3, aftertreatment is carried out to obtain the heat-resistant polymer porous material.

The invention discloses a polyquinazoline compound as well as a preparation method and application thereof. The preparation method comprises the following step: carrying out multi-component polymerization reaction on normal-pressure carbon dioxide, bifunctional isonitrile and bifunctional o-iodobenzidine monomer under the action of a catalyst and alkali to obtain the polyquinazoline compound. Themethod is mild in condition, and the polymerization monomer is simple and easy to obtain. The polyquinazoline compound obtained by the invention has good solubility, processability and high thermal stability, and has potential application in the fields of metal ion detection and self-assembly.

The invention relates to the technical field of oilfield water injection, and discloses an acrylamide copolymer, a preparation method and applications thereof. The preparation method comprises: underthe condition of a solution polymerization reaction, in the presence of an initiator and a surfactant, carrying out a polymerization reaction on acrylamide and a monomer mixture comprising a comonomerwith a structure represented by a formula (1) and an active monomer with a structure represented by a formula (2) in water, wherein the initiator comprises an initiator A with a structure representedby a formula (3) and an initiator B, the initiator B is 4-methylthiosemicarbazide, R1-R3 and R5 are respectively selected from hydrogen and C1-C4 alkyl, R4 is C1-C4 alkylene, M is hydrogen, sodium orpotassium, R6-R9 are respectively C1-C4 alkyl, n is an integer of 1-10, and m is an integer of 2-6. According to the invention, the prepared acrylamide copolymer has advantages of ultrahigh molecularweight tackifying property, excellent solubility, excellent temperature resistance, excellent salt resistance and favorable surface / interface activity.

The present invention provides a formula and a preparation method of a cationic polymer. The raw material formula of the cationic polymer comprises the following components in part by weight: water 5-50, acetone 3-25, amine 5-30, aldehyde 5-40, alkaline regulator 3-12 and acidic regulator 5-20. In the method, a water soluble cationic polymer is prepared from aldehyde, acetone and amine by a nucleophilic addition reaction, an aldol condensation reaction and a Michael addition reaction in the presence of acid and alkali catalysts in turn and by a two-step feeding process. The method has the advantages that: the raw material cost is low, the synthesis process is simple and easy to implement; the preparation conditions are mild and safe; and the obtained product has high cation content and has high decolorizing and flocculating effects on anionic dye waste water.

The present invention discloses a temperature-resistant and salt-resistant polymer oil displacement agent and a preparation method thereof, wherein the temperature-resistant and salt-resistant polymer oil displacement agent is formed by polymerizing acrylamide, allyl polyethylene glycol, sodium p-styrene sulfonate, and dimethyl allyl octadecylammonium chloride according to a molar ratio of (94-97):(1.7-4.7):(0.3-1.0):(0.3-1.0). According to the present invention, the polymer oil displacement agent can maintain good tackifying effect at a high temperature in a salt solution having a certain concentration, and has characteristics of good temperature resistance, good salt resistance, good shear resistance, low raw material monomer cost, mild polymerization reaction condition, and simple process.

The invention discloses a sulfamide polymer and a preparation method thereof, and relates to the technical field of polymer synthesis. The sulfamide polymer has a structural formula as shown in a general formula (I), wherein R1 and R2 are organic groups, and n is the degree of polymerization and is an integer between 2 and 50. The preparation method comprises the following steps: carrying out polymerization reaction on a binary sulfonyl azido compound and a binary arylboronic acid compound in an organic solvent, and carrying out precipitation separation on the product through diethyl ether to obtain the sulfamide polymer, wherein any alkali, ligand or additive is not needed. The method has the advantages of mild reaction conditions, simple reaction post-treatment, cheap and low-toxicity catalyst, easy substrate modification and the like.

The present invention relates to the technology of thermoplastic elastomers, and aims to provide a multi-block branched polyethylene and a preparation method therefor, and further provide an application for the polyethylene. The multi-block branched polyethylene of the present invention is formed by alternate connection according to the connecting means of formula (A) by a semi-crystalline polyethylene segment having a low branching degree as a hard segment and an amorphous polyethylene segment having a high branching degree as a soft segment. In the preparation process of the present invention, the raw material is an ethylene monomer only, and thus production costs are low. The preparation process only requires one catalyst, thus considering the issue of matching two catalysts is not necessary, thereby greatly simplifying the production process and being suitable for large-scale industrial production. The chain shuttling reaction of the present invention is carried out between two identical metal active centers in a molecule, and has the advantages of being highly efficiency and fast. The chain structure and composition of the polymerization product are uniform. The polymerization reaction conditions are mild, the same not needing to be carried out at high temperatures, such that the energy consumption thereof is greatly reduced.

The invention relates to a novel binuclear xanthene bridging amino-pyridine nickel catalyst and a preparation method thereof. The novel binuclear xanthene bridging amino-pyridine nickel catalyst is used for catalyzing ethylene polymerization to prepare polyethylene which is low in polymerization degree and high in branching degree. The binuclear nickel catalyst has the advantages that the catalystis high in thermal stability and catalytic activity and capable of effectively regulating the molecular weight and branching degree of polyethylene, and the prepared polyethylene which is low in polymerization degree and high in branching degree can be used as a diesel oil pour point depressant and can effectively lower the condensation point and cold filter plugging point of diesel oil.

The invention belongs to the technical field of organic synthesis and discloses a polyfuran compound and a preparation method thereof. The polyfuran compound has a structural general formula shown as a formula (I). The preparation method includes: in a normal-pressure oxygen environment, enabling bifunctional aryl acetylene monomer and oxygen to be in polymerization reaction in an organic solvent through joint action of a catalyst and a cocatalyst; dissolving a product in the organic solvent; adding into methanol for precipitation; collecting precipitate; drying to constant weight to obtain the polyfuran compound. The preparation method is conducted in the normal-pressure oxygen environment, and oxygen participates in formation of polymer, so that feeding proportion of the monomer does not need to be controlled; the polyfuran compound has high thermostability and excellent processability and has huge application prospect in the field of explosive detection and two-photo absorption due to special photophysical properties.

The invention relates to a synthesis method for polyvinyl chloride with a high polymerization degree on the basis of Pickering emulsion type chain extender. The synthesis method comprises the following steps: firstly, preparing the Pickering emulsion type chain extender from montmorillonite solid particles with an emulsification stability function, the chain extender and the like; then, with a suspension method, synthesizing the polyvinyl chloride with the high polymerization degree. The prepared Pickering emulsion type chain extender is environmentally friendly and high in stability; the Pickering emulsion type chain extender is added in one time when being used and has the advantages of even chain extension function, high utilization ratio, good adaptation in a polyvinyl chloride suspension system, small use amount, moderate polymerization condition and relatively simple technology. The obtained polyvinyl chloride with the high polymerization degree has good resin performance, small'fisheye' amount, good product appearance, higher intensity and better environmental adaptation.

The invention relates to the technical field of oil field water injection, and discloses an acrylamide copolymer and its preparation method and application. Amide, the monomer mixture that the comonomer of structure as shown in formula (1) and the active monomer composition of structure as shown in formula (2) carry out polymerization reaction in water; Initiator includes structure as shown in formula (3) Initiator A and initiator B, initiator B is amidinothiourea; Wherein, R 1 -R 3 and R 5 each selected from hydrogen or C1-C4 alkyl, R 4 Is C1-C4 alkylene, M is hydrogen, sodium or potassium; R 6 -R 9 Each is a C1-C4 alkyl group, n is an integer of 1-10, and m is an integer of 2-6. The prepared acrylamide copolymer has ultra-high molecular weight viscosity-increasing properties, excellent solubility, temperature and salt resistance, and good surface / interface activity.

The invention discloses a polyacetylene amide compound as well as a preparation method and application thereof. The preparation method comprises the following steps that: under the inert gas atmosphere, water, a bifunctional terminal alkyne monomer and a bifunctional isonitrile monomer are subjected to a polymerization reaction in an organic solvent under the combined action of a catalyst and a ligand, and after the reaction is finished, the product is purified and dried to obtain the polyacetylene amide compound. The method is mild in condition, and the polymerization monomer is simple and easy to obtain. The polyacetylene amide compound obtained by the method has relatively good solubility and relatively high thermal stability, and has potential application in the field of self-assembly.

The invention relates to an ultra-high molecular weight poly(4-alkoxystyrene) and a preparation method thereof. The ultra-high molecular weight poly(4-alkoxystyrene) is of a structure as shown in a formula (I), wherein R is methyl or ethyl; and the weight-average molecular weight is not less than 1 million. The provided ultra-high molecular weight poly(4-alkoxystyrene) has the weight-average molecular weight of not less than 1 million, and better mechanical properties, thermal stability, and hydrophilic properties are realized comparing with commercial polystyrene .