Synthesis of polystyrene with high melting temperature through BDE/CuCI catalyzed polymerization  

Synthesis of polystyrene with high melting temperature through BDE/CuCl catalyzed polymerization

作　　者：万小龙 倪百兵 刘燕飞 应圣康 

出　　处：《Science China Chemistry》2001年第1期68-73,共6页中国科学（化学英文版）

基　　金：the National Natural Science Foundation of China (Grant No. 29634010-2).

摘　　要：No matter what the polymerization manner was, polystyrene with unique highT m (T m = 170–285°C) 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 of1H-NMR and13C-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.No matter what the polymerization manner was, polystyrene withunique high Tm (Tm = 170-285℃) 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 1H-NMR and 13C-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.

关 键 词：POLYSTYRENE “living”/controlled polymerization synthesis bis(dimethylaminoethyl) ether 

分 类 号：TQ325[化学工程—合成树脂塑料工业]