Syntheses of well-defined macro-monomers by living  readical polymerization

Abstract

A novel monomer-iniferter, allyl 2-N,N-diethyldithiocarbamylacetate (ADCA), has been successfully synthesized. It was used as a photoiniferter to initiate methyl methacrylate (MMA) and styrene (St) polymerization, respectively, under UV light irradiation at ambient temperature. The polymerizations exhibit the living radical polymrization characteristics, i. e., the molecular weight of the obtained polymers increases linearly with the increasing monomer conversion. In all cases, the number of the averatge end group of diethyldithiocarbamyl (DC) in polymers is about 1. 1^H NMR analyses show that the obtained polymers are macro-monomers functionalized with an α-allyloxycarbonylmethylene group and an ω-DC group. ESR studies reveal that polymerization mechanism is based on a reversible termination of propagating radical by DC group.

Key words: FREE REDICAL POLYMERIZATION, METHYLMETHACRYLATE, STYRENE, PROTON MAGNETIC RESONANCE SPECTROMETRY, REACTION MECHANISM, ELECTRON SPIN RESONANCE

CLC Number:

O631.3

Cite this article

Qin Shuhui;Qiu Kunyuan. Syntheses of well-defined macro-monomers by living readical polymerization[J]. Acta Chimica Sinica, 2001, 59(10): 1776-1782.

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通过活性自由基聚合制备结构精致的大分子单体

Syntheses of well-defined macro-monomers by living readical polymerization

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