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‘Living’ Radical Polymerization of Styrene Using Tetraphenylethane-based Polyurethane Iniferter

✍ Scribed by Tharanikkarasu, Kannan; Radhakrishnan, Ganga

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
418 KB
Volume
43
Category
Article
ISSN
0959-8103

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✦ Synopsis

A novel polyurethane iniferter synthesized from 1,1,2,2-tetraphenyl-1,2ethane diol and toluene diisocyanate has been used to polymerize styrene through a "livingÏ radical mechanism. A rate equation (R p P [styrene]1Õ1 [polyurethane iniferter]0Õ93) and overall activation energy (E a \ 99 kJ mol~1) have been deduced from the kinetic results. The molecular weight of the polystyrene increased with increasing polymerization time and conversion. When the polystyrene was post-polymerized in the presence of styrene and methyl methacrylate, a high molecular weight polystyrene and polystyreneÈpoly(methyl methacrylate) block copolymer were obtained, respectively.

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