Side chain functional polymer and preparation method thereof

Abstract

The invention discloses a side chain functional polymer and a preparation method thereof. A polymerization system consists of a monomer, an initiator, a chain transfer agent, a catalyst, a coordination agent and a coupling component, wherein the monomer is undecyl azidomethacrylic ester; the catalyst is copper; the coordination agent is N,N,N',N'',N''-pentamethyldiethylenetriamine; the coupling component is 4-methyoxyl-4'-propynyloxy azobenzene; single electron transfer (SET) is adopted for initiation to produce a free radical; polymerization reaction of the monomer is performed by a method for performing chain propagation in a reversible addition fragmentation chain transfer (RAFT) mode; meanwhile, click chemical reaction is performed; and monovalent copper is used for catalyzing an azide group and an alkynyl group in the coupling component to perform cycloaddition reaction so as to obtain the side chain functional polymer. Since the SET-RAFT method and the click chemical method are combined, the side chain functional polymer can be obtained by only one-step reaction; and thus, the reaction steps are reduced, the waste rate of the raw materials is reduced, rational utilization ofthe resources is realized, side reaction is basically avoided, and troublesome purification operation is avoided.

Description

technical field [0001] The present invention relates to a simple and controllable preparation method of a side chain functionalized polymer, in particular to a method for generating free radicals induced by single electron transfer and carrying out chain growth (SET-RAFT) polymerization in the form of reversible addition-fragmentation chain transfer Simultaneously performing click chemistry reactions allows for a controlled approach to the preparation of polymers. Background technique [0002] Click Chemistry (Click Chemistry) is a class of chemical reactions proposed by Professor K.Barry Sharpless in 2001, which has the characteristics of high efficiency, high selectivity, high adaptability to solvents and functional groups, and mild reaction conditions. A widely used class of click chemistry techniques is the copper-catalyzed cycloaddition of azides and alkynes (CuAAC). In terms of polymer chemistry, a series of functional polymer materials, including dendrimers, hydrogel...

AI Technical Summary

Problems solved by technology

This technology realizes the ATRP polymerization of azide monomer, but in the late stage of polymerization (when the monomer conversion rate is high, the polymerization is out of control, and the molecular weight distribution index of the polymer is greater than 1.5), and it needs to be synthesized by CuAAC reaction to synthesize side chain functionalized polymer. Two-step method, the synthesis steps are complicated, and the polymer needs to be separated and purified in multiple steps

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