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7738637 
Journal Article 
(CH3)(3)SiCl/TiCl4 initiating system for cationic polymerization of 1,3-pentadiene 
Deng, JG; Zhang, WC; Peng, YX 
1999 
Yes 
Chinese Journal of Polymer Science
ISSN: 0256-7679
EISSN: 1439-6203 
17 
5 
459-464 
English 
WOS:000083740100009 
Cationic polymerizations of 1,3-pentadiene (PD) initiated by trimethylsilyl chloride (TMSCl) in combination with TiCl4 were carried out in n-hexane at 30°C. The yield of polymer was greatly increased by the addition of TMSCl, indicating that the TMSCl/TiCl4 combination is an efficient initiating system for PD cationic polymerization. However, the introduction of TMSCl gave rise to a drop in the molecular weight of the polymer. Kinetic results demonstrated that the polymerization initiated by TMSCl/TiCl4 is 4.5 times faster than that induced by TiCl4 alone. Various ethers were used to mediate the TMSCl/TiCl4 initiating system. Adding diphenyl ether could increase both the yield and molecular weight of the polymer. Structural evidence illustrates that the polymerization is indeed initiated by TiCl4 in combination with HCl resulting from hydrolysis by adventitious water. © 1999 Springer-Verlag. 
1,3-pentadiene; cationic polymerization; TMSCl; TiCl4