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Tetraphenylethane iniferters: Polyurethane‐polystyrene multiblock copolymers through “living” radical polymerization
Author(s) -
Tharanikkarasu K.,
Radhakrishnan Ganga
Publication year - 1997
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19971121)66:8<1551::aid-app16>3.0.co;2-6
Subject(s) - polyurethane , copolymer , polymer chemistry , isocyanate , styrene , polystyrene , materials science , thermal stability , polymerization , toluene diisocyanate , radical polymerization , polymer , chemistry , organic chemistry , composite material
Toluene diisocyanate‐based polyurethane iniferters containing tetraphenyl‐ethane groups in between polyurethane blocks were prepared by the reaction of isocyanate‐terminated prepolymers and 1,1,2,2‐tetraphenyl‐1,2‐ethanediol. When these iniferters were decomposed in the presence of styrene, polyurethane‐polystyrene multiblock copolymers were obtained through a “living” radical mechanism. The effect of changing polyol on the T g , thermal stability, and molecular weight of polyurethane iniferters as well as block copolymers was studied. The molecular weight of the block copolymers increased with increasing both polymerization time and conversion. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 1551–1560, 1997