High-grafting density cyclic comb shaped polymer and preparation method therefor

Abstract

A high-grafting density cyclic comb shaped polymer and its preparation method therefor. The method comprises the following steps: 1) synthesizing linear poly(pentafluorophenyl 4-vinylbenzoate) (l-PPF4VB); 2) performing photo-induced cyclization on the linear polymer to prepare the cyclic polymer (c-PPF4VB); 3) performing post modification on the cyclic polymer c-PPF4VBby using small molecules to prepare a functionalized cyclic polymer (c-P1); 4) then performing polymer post modification on the cyclic polymer (c-P1) by using an efficient click reaction to construct the high-grafting density cyclic comb shaped polymer (c-P1--PS); and 5) directly performing polymer post modification on the cyclic polymer c-PPF4VBby using macromolecules to construct a high-grafting density cyclic comb shaped polymer (c-PPF4VB-g-PEG), the obtained cyclic comb shaped polymer still remaining the characteristic of a narrow molecular weight distribution.