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A kind of amphiphilic hybrid arm graft polymer and its preparation method and application based on one-pot method

A graft polymer and amphiphilic technology, which is applied in the field of amphiphilic hybrid arm graft polymer and its preparation based on a one-pot method, can solve the problems of troublesome operation and many reaction steps, and the method is simple and easy to operate , mild reaction conditions, good reproducibility

Active Publication Date: 2021-04-06
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of synthesizing this hetero-arm graft polymer is mostly to modify the side group functional group of the polymer matrix to obtain the initiating active center that can initiate two different mechanism reactions. The common one is the ATRP active center that initiates the polymerization of vinyl monomers. And the hydroxyl group that initiates ring-opening of cyclic monomers, this method has many reaction steps and is cumbersome to operate, and there is no report on the direct one-pot method of initiating hetero-arm grafted polymer chains on the polymer matrix

Method used

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  • A kind of amphiphilic hybrid arm graft polymer and its preparation method and application based on one-pot method
  • A kind of amphiphilic hybrid arm graft polymer and its preparation method and application based on one-pot method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) Synthesis of P(MMA 40 -co-HEMA 60 ) random copolymer:

[0027] Add MMA (0.40g, 4.0mmol), HEMA (0.78g, 6.0mmol), EBiB (19.50mg, 0.1mmol), PMDETA (20.60mg) and 3mL to a 50mL Schlenk bottle equipped with magnets isopropanol, then "freeze and vacuum-thaw" twice, then add CuBr (14.40mg, 0.1mmol) under the condition of nitrogen, and then freeze and pump for 2 minutes, thaw, put the Schlenk bottle into the set Temperature of the oil bath, the reaction 12h. After the reaction was completed, the Schlenk bottle was placed in the lower layer of the refrigerator for 5 minutes, and then the reaction mixture was diluted with 20 mL of tetrahydrofuran. Immediately afterwards, the diluted reaction mixture was passed through a column filled with neutral alumina, and the liquid was collected; then most of the solvent was removed with a rotary evaporator, and the remaining solvent was added to petroleum ether to obtain a white precipitate, which was vacuum-dried. get P(MMA 40 -co-...

Embodiment 2

[0039] Synthesize P(MMA in step (1) 40 -co-HEMA 60 ) in the process of random copolymer change reaction solvent isopropanol into tetrahydrofuran (THF), other implementation conditions and embodiment 1 synthetic P (MMA 40 -co-HEMA 60 ), we characterized the resulting polymer P(MMA 40 -co-HEMA 60 ) random copolymer, the number-average molecular weight of the polymer is the same as the design value, but the molecular weight distribution rises more, which is 1.26, and the synthetic graft polymer needs the matrix polymer to have a molecular weight distribution as narrow as possible, so tetrahydrofuran is the reaction solvent Not suitable.

Embodiment 3

[0041] Synthesize P(MMA in step (1) 40 -co-HEMA 60 ) in the process of random copolymer change reaction solvent Virahol into acetonitrile, other implementation conditions and embodiment 1 synthetic P (MMA 40 -co-HEMA 60 ), we characterized the resulting polymer P(MMA 40 -co-HEMA 60 ) random copolymer, the number-average molecular weight of the polymer is the same as the design value, but the molecular weight distribution rises more, which is 1.28. Synthetic graft polymer requires the matrix polymer to have as narrow a molecular weight distribution as possible, so acetonitrile is the reaction solvent Not suitable.

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Abstract

The invention belongs to the technical field of polymer synthesis, and discloses an amphiphilic heteroarm graft polymer and its preparation method and application based on a one-pot method. The polymer has a structure represented by the following formula (I). Methyl methacrylate and hydroxyethyl methacrylate are prepared by ATRP polymerization to obtain P (MMA-co-HEMA) random copolymer; P (MMA-co-HEMA) random copolymer, phosphazene base , Octamethylcyclotetrasiloxane and tert-butyl methacrylate mixed reaction, with the hydroxyl group on the P(MMA-co-HEMA) random copolymer as initiator, with phosphazene base as catalyst, initiate octamethyl Ring-opening polymerization of cyclotetrasiloxane and anionic polymerization of tert-butyl methacrylate; add trifluoroacetic acid to react, remove tert-butyl group on polymethacrylic acid in the polymer, and obtain amphiphilic hetero-arm junction branch polymer.

Description

technical field [0001] The invention belongs to the technical field of polymer synthesis, and in particular relates to an amphiphilic heteroarm graft polymer and its preparation method and application based on a one-pot method. Background technique [0002] Graft copolymer refers to the grafting of one polymer to another polymer chain or solid surface to form a copolymer that resembles a comb shape. The entire polymer molecule forms a brush-like configuration, which is different from the random coil conformation of general polymer chains, so its physical and chemical properties are also different from general polymers. So far, grafting technology has developed into one of the basic methods for modifying polymer materials, and the grafting objects almost cover the entire polymer field. Both natural polymers (such as starch, wool, silk and natural rubber, etc.) and synthetic polymers (including various synthetic rubbers, synthetic fibers and plastics, etc.) can be grafted. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/12C08F265/04C08F220/06C08F220/14C08F220/20C08G77/442C08G77/04C08G77/06
Inventor 陈扬肖文昊蔡志鹏许进宝雷彩红
Owner GUANGDONG UNIV OF TECH