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Initiating system Me 3 SiCl/AlCl 3 for cationic polymerization of 1,3‐pentadiene in toluene
Author(s) -
JianGuo Deng,
YuXing Peng
Publication year - 1998
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19980160512
Subject(s) - chemistry , cationic polymerization , polymerization , polymer , aluminium chloride , chloride , polymer chemistry , toluene , yield (engineering) , organic chemistry , aluminium , materials science , metallurgy
Cationic polymerization of 1,3‐pentadiene (PD) initiated by trimethylsilyl chloride/aluminium chloride (TMSCI/AlCl 3 ) was carried out in toluene at 30°C. The polymer yield was increased by the addition of TMSCl. However, introduction of TMSCl gave rise to a drop of the polymer molecular weight. Kinetic results demonstrated that the polymerization initiated by TMSCl/AlCl 3 was 2.8 times faster than that induced by AlCls alone. Various ethers and ketones were used to mediate the initiating system TMSCI/AICl 3 . The polymer yield and molecular weight of the polymer were decreased in the presence of ether. Ketones and ethers had different effects on the polymerization, and the polymer yield and molecular weight were lower than those initiated by AlCls alone or TMSCl/AlCl 3 . Structural evidence revealed that the polymerization was indeed initiated by AlCl 3 and HCl resulting from hydrolysis of TMSCl by adventitious water.