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Preparation of polystyrene‐block‐(ethylene oxide)s and characterization of the products
Author(s) -
Uyanik Nurseli,
Baysal Bahattin M.
Publication year - 1990
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/app.1990.070410905
Subject(s) - copolymer , ethylene oxide , isocyanate , polymer chemistry , polystyrene , materials science , oxide , characterization (materials science) , ethylene , polyurethane , radical polymerization , polymerization , infrared spectroscopy , chemistry , organic chemistry , polymer , catalysis , composite material , metallurgy , nanotechnology
Block copolymers containing segments of poly(ethylene oxide) and polystyrene were synthesized. Dihydroxyl‐terminated polyethers (PEG‐4000 and PEG‐20,000) were reacted with an aliphatic diisocyanate (3‐isocyanatomethyl‐3,5,5‐trimethyl‐cyclohexyl‐isocyanate) and with an aliphatic hydroperoxide ( t ‐butyl hydroperoxide). The resulting polymeric peroxycarbamates were used as free radical initiators for vinyl polymerization. Formation of block copolymers was illustrated by several characterization methods such as chemical and UV analysis, infrared spectroscopy, and DSC thermograms. Mechanical characterization of the copolymers was made on the basis of the stress—strain curves obtained from a mechanical testing instrument (Tensilon).