Bulk polymerization of styrene with diethyl 2,3-dicyano-2,3-di(p-tolyl)-succinate as a thermal iniferter
文献类型： 外文期刊
作者： Qin, SH 1 ; Qin, DQ 2 ; Qiu, KY 2 ; Westmoreland, DG 2 ; Lau, W 2 ; Wu, SG 2 ; Swift, G 2 ;
作者机构： 1.Peking Univ, Dept Polymer Sci & Engn, Beijing 100871, Peoples R China
2.Peking Univ, Dept Polymer Sci & Engn, Beijing 100871, Peoples R China; Rohm & Haas Co, Spring House, PA 19477 USA
期刊名称：JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY （ 影响因子：0.749； ）
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收录情况： SCI
摘要： The bulk polymerization of styrene (St) was investigated using diethyl 2,3-dicyano-2,3-di(p-tolyl)succinate (DCDTS), a hexa-substituted ethane compound, as an initiator. The polymerization data show that DCDTS behaves as a thermal iniferter, and the polymerization proceeds by a "living" radical polymerization mechanism with a reversible deactivation. The polymerization can be carried out at quite low temperatures (such as 65-85 degreesC) and the final conversions are high. The PSt possessed high molecular weights and molecular weight distributions (M-w/M-n in the range of 1.4 to 1.6). End-group analysis by H-1 NMR spectroscopy reveals that the resultant PSt contains the fragments of DCDTS at its chain ends. This polymer with an omega -penta-substituted C-C bond end group could be used as a macroinitiator to carry out chain-extension reaction with St and could also block copolymerization with methyl methacrylate. [References: 24]
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