文献类型：期刊文献

英文题名：Synthesis of polystyrene with high melting temperature through BDE/CuCl catalyzed polymerization

作者：Wan, X.[1]; Ni, B.[1]; Liu, Y.[1]; Ying, S.[1]

机构：[1]E China Univ Chem Technol, Lab Living Polymerizat, Shanghai 200237, Peoples R China

年份：2001

卷号：44

期号：1

起止页码：68

外文期刊名：SCIENCE IN CHINA SERIES B-CHEMISTRY

收录：;EI(收录号：2001326607942);WOS:【SCI-EXPANDED(收录号:WOS:000167310000010)】；

语种：英文

外文关键词：polystyrene; "living"/controlled polymerization; synthesis; bis(dimethylaminoethyl) ether

摘要：No matter what the polymerization manner was, polystyrene with unique high T-m (T-m = 170-285 degreesC) was obtained through polymerization of styrene if the amount of BDE/CuCl catalyst was highly increased (mol ratio: St:CuCl = 25:1-2.5:1), Partial crystallinity of the PSt was observed by characterizations of X-ray diffraction and DSC. Spectra of H-1-NMR and C-13-NMR showed that syndiotactic structure contained in the obtained PSt was 5% more than that in aPSt (atactic polystyrene). According to the proposed "coordinated radical cage" mechanism, the coordinated state between radical and catalyst center metal Cu should be more closely packed with increasing the BDE/CuCl catalyst amount, which was induced to partial stereospecific polymerization in the coordinated radical polymerization of St.