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Styrene polymerization with a macroinitiator having siloxane units
Author(s) -
Baysal Bahattin M.,
Uyanik Nurseli,
Hamurcu E. Elif,
Cvetkovska Maja
Publication year - 1996
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(19960531)60:9<1369::aid-app12>3.0.co;2-y
Subject(s) - copolymer , isophorone diisocyanate , siloxane , polymer chemistry , styrene , materials science , polystyrene , polymerization , radical polymerization , contact angle , polyurethane , polymer , composite material
Block copolymers containing segments of poly(dimethylsiloxane) (PDMS) and polystyrene were synthesized. Dihydroxy terminated PDMS M n 2500 g/mol, was reacted with an ali‐phatic diisocyanate (isophorone diisocyanate) and an aliphatic hydroperxide ( t ‐butyl hy‐droperoxide). The resulting polymeric peroxycarbamate having siloxane units (a new mac‐roinitiator) was used as free radical initiator for vinyl polymerization of styrene. Formation of block copolymers was illustrated by several characterization methods such as chemical and spectroscopic analysis, fractionation, and GPC. Mechanical and thermal characterization of the copolymers were made by stress–strain tests and DSC. The surface properties and the morphology of the block copolymers were investigated by contact angle measurements and SEM. © 1996 John Wiley & Sons, Inc.