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A kind of aqueous solution open environment anionic polymerization method

An anionic polymerization, aqueous solution technology, applied in the polymer field, can solve problems such as weak activity, and achieve the effect of mild conditions, environmental friendliness, and mild reaction conditions

Active Publication Date: 2020-07-14
COLORTECH SUZHOU BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Alternatively, other nucleophiles such as R 3 N and R 3 P, etc. can also trigger the formation of zwitterions from monomers, but its activity is weak, and it can only trigger the polymerization of very active monomers.

Method used

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  • A kind of aqueous solution open environment anionic polymerization method
  • A kind of aqueous solution open environment anionic polymerization method
  • A kind of aqueous solution open environment anionic polymerization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: With tripolyethylene glycol monomethyl ether vinyl sulfone (M-EG 3 -VS) as initiator, sulfobetaine methacrylate (SBMA) as monomer to prepare polysulfobetaine methacrylate (pSBMA)

[0040] M-EG 3 -VS, SBMA monomer and 1-methylimidazole were dissolved in 12mL of HEPES buffer (pH 8.0) at a concentration ratio of 2mM: 100mM: 10mM, reacted at 35°C for 48 hours, and then added hydrochloric acid until the solution was acidic to terminate the reaction. Use ultrafiltration membrane with a molecular weight cut-off of 3000Da and lyophilize after dialysis, use 1 HNMR and aqueous GPC characterization, such as figure 1 , figure 2 shown.

[0041] From the H NMR spectrum ( figure 1 ) as can be seen, the reaction product peak corresponds to the methyl peak at the h position at 1.00 ppm; a new peak appears at 1.94 ppm, corresponding to the methylene peak at the pSBMAg position after the polymerization of the SBMA monomer; the peak at 2.20 ppm corresponds to the methyl...

Embodiment 2

[0042] Embodiment 2: with tripolyethylene glycol monomethyl ether vinyl sulfone (M-EG 3 -VS) is an initiator, and hydroxyethyl methacrylate (HEMA) is a monomer to prepare polyhydroxyethyl methacrylate (pHEMA)

[0043] M-EG 3 -VS, HEMA monomer and 1-methylimidazole were dissolved in 12mL HEPES buffer (pH 8.0) according to the concentration ratio of 2mM: 100mM: 10mM, reacted at 35°C for 48 hours, then added hydrochloric acid until the solution was acidic to terminate the reaction, and freeze-dried , characterized using aqueous GPC. From image 3 It can be seen that the polymerization reaction occurs, and the number average molecular weight (Mn) of the product obtained by the reaction is 1291, and the dispersibility index (PDI) is 1.072.

Embodiment 3

[0044] Embodiment 3: with tripolyethylene glycol monomethyl ether vinyl sulfone (M-EG 3 -VS) as initiator, N,N-dimethylacrylamide as monomer to prepare poly N,N-dimethylacrylamide

[0045] M-EG 3 -VS, N,N-dimethylacrylamide monomer and 1-methylimidazole were dissolved in 12mL HEPES buffer solution (pH 8.0) according to the concentration ratio of 2mM: 100mM: 10mM, reacted at 35°C for 48 hours and then added hydrochloric acid to The solution was acidic to terminate the reaction, freeze-dried, and characterized by aqueous GPC. From Figure 4 It can be seen that the polymerization reaction occurs, and the number average molecular weight (Mn) of the product obtained by the reaction is 1266, and the dispersibility index (PDI) is 1.022.

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Abstract

The invention discloses an anionic polymerization method in an aqueous solution open environment. The method comprises the following steps: taking a vinyl sulfone compound as an initiator, taking an organic base as a catalyst, reacting at a temperature of 25-100 DEG C for 1-72 hours, thereby realizing aqueous solution environment anionic polymerization of olefins containing alpha-electron-withdrawing groups. The method is wide in substrate application range, wide in reaction conditions and high in controllability, does not need any water-free and oxygen-free operation, and is an aqueous solution environment anionic polymerization method with huge potential.

Description

technical field [0001] The invention belongs to the field of macromolecules, and in particular relates to an anion polymerization method in an open environment in an aqueous solution. [0002] technical background [0003] Polymer materials are widely used in people's daily life and research in various fields. Polymer materials are usually prepared from monomers through polymerization reactions. Common polymerization reactions include free radical polymerization, cationic polymerization and anionic polymerization. Anionic living polymerization has the characteristics of no termination and no chain transfer, and is an ideal method for preparing polymer standards with uniform molecular weight, block copolymers and telechelic polymers with special corona groups. [0004] Anionically polymerized olefin monomers usually have electron-withdrawing properties, so that the double bond has a certain degree of electropositivity and electrophilicity. Anion active centers are formed with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F297/02
CPCC08F297/02C08F297/026
Inventor 程昉刘鸿鑫王汉奇王华楠
Owner COLORTECH SUZHOU BIOTECHNOLOGY CO LTD
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