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

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 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 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 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 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 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 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 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 .