Citation: Cui-ping Lia, Rong Huanga, Jia-qiang Wanga, Zan Liub. BRANCHING GENERATION DURING THE FREE RADICAL COPOLYMERIZATION OF p-VINYL BENZENE SULFONYL CHLORIDE WITH STYRENE[J]. Chinese Journal of Polymer Science, ;2013, 31(10): 1404-1414. doi: 10.1007/s10118-013-1305-9 shu

BRANCHING GENERATION DURING THE FREE RADICAL COPOLYMERIZATION OF p-VINYL BENZENE SULFONYL CHLORIDE WITH STYRENE

1.
Department of Applied Chemistry, Key Laboratory of Medicinal Chemistry for Natural Resource, College of Chemistry Science and Engineering, Yunnan University, Yunnan 650091, China
2.
Kunming Cable Co., Ltd, Yunnan 650100, China

Received Date: 30 October 2012
Revised Date: 23 January 2013

Fund Project: National Natural Science Foundation of China (No. 51003091), the Education Research Foundation of Yunnan Province (No. 2010Y240), the Research Foundation of Yunnan University (No. 2009B06Q), the Backbone Teacher Training Program of Yunnan University (No. 21132014).

The branching generation during the free radical copolymerization of chain transfer monomer p-vinyl benzene sulfonyl chloride (VBSC) with styrene was investigated by a simple mathematic model. Chain transfer constant of VBSC was determined to be around 0.3 by fitting the 1H-NMR monitored experimental results with a mathematic model. According to the theoretical analysis, the obtained poly(VBSC) and its copolymers were substantiated to have a grafting-like main chain with residual pendent sulfonyl chloride groups after consuming most of the vinyl groups. The copolymerization results of VBSC with styrene at varied feed ratios demonstrated that conversion of sulfonyl chloride groups was lower than that of the monomer, which was in agreement with the theoretical results. The glass transition temperature, number average molecular weight and distribution of those obtained polymers were primarily investigated. Comparing with other chain transfer monomers, VBSC has a chain transfer constant much closer to unity therefore a more branched polymer is expected. Additionally, the branched polystyrene with residual sulfonyl chloride groups is hopefully to be further used as ATRP macroinitiators or reactive intermediates to synthesize functional polymers with complex structure.
- Branched polystyrene,
- Chain transfer constant,
- Chain transfer monomer,
- p-Vinyl benzene sulfonyl chloride,
- Radical polymerization
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