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Citation: DING Wei, LV Chongfu, SUN Ying, JING Hui, WEI Jijun, LUAN Hexin, YU Tao, QU Guangmiao. Single Electron Transfer Living Radical Polymerization of Styrene[J]. Chinese Journal of Applied Chemistry, ;2011, 28(9): 999-1005. doi: 10.3724/SP.J.1095.2011.00621 shu

Single Electron Transfer Living Radical Polymerization of Styrene

DING Wei ^a,, ,
LV Chongfu ^a,b ,
SUN Ying ^a,b ,
JING Hui ^a ,
WEI Jijun ^a ,
LUAN Hexin ^a ,
YU Tao ^a ,
QU Guangmiao ^a

1.
a Provincial Key Laboratory of Oil & Gas Chemical Technology, Chemistry and Chemical Engineering College of Northeast Petroleum University, Daqing 163318;
2.
b Guangfa Chemical Industry of Datong Coal Mine Group Co., Ltd, Datong

Corresponding author: DING Wei,
Received Date: 19 October 2010
Available Online: 30 December 2010
Fund Project: 国家科技重大专项(2008ZX05011) (2008ZX05011)黑龙江省自然科学基金重点项目(ZJG0507) (ZJG0507)黑龙江省自然科学基金青年基金(QC08C33)资助项目 (QC08C33)黑龙江省研究生创新科研资金(YJSCX2008-044HLJ) (YJSCX2008-044HLJ)

The polystyrene(PSt) was synthesized by a single electron transfer living radical polymerization(SET-LRP) in a binary mixture of dimethyl sulfoxide(DMSO) and water using 2,2-dibromomethyl-1,3-dibromopropane as the multifunctional initiator, Cu⁰ powder and tris-(2-dimethylamino ethyl) amine(Me₆-TREN) as catalytic system. The resulting polymers were analyzed by ¹H NMR and GPC, the results showed that the distribution of the resulting polymer was narrow(M_w/M_n=1.20, M_n^GPC=25.3×10³, 42.6% conversion) and the polymers prepared were star shape and had perfect chain ends -Br retention. In addition, the kinetic plots of polymerization were first order, which indicated a living polymerization process. The various factors which had affected the SET-LRP of St such as solvent, polymerization temperature and phase transfer catalyst(PTC) were studied, and the results showed that the H₂O content in the binary mixtures increasing form 10% to 20%(volume fraction) led to a reduction in polymerization rate, which could be revealed by the apparent polymerization rate constant(k_p^app) of 0.019 7 h^-1 reducing from 0.026 4 h^-1. Meanwhile the k_p^app increased in according with enhancing the polymerization temperature, increasing the amount of catalyst or adding the PTC. The addition of PTC or increasing the amount of catalyst could improve the control of the polymerization.
- single electron transfer living radical polymerization,
- polystyrene,
- phase transfer catalyst,
- star polymer
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