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Polystyrene modifications. I. Styrene copolymers
Author(s) -
Dunham K. R.,
Vandenberghe J.,
Faber J. W. H.,
Fowler W. F.
Publication year - 1963
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.1963.070070113
Subject(s) - polystyrene , copolymer , acenaphthylene , styrene , crazing , materials science , polymerization , polymer chemistry , polymer , polybutadiene , chemical engineering , chemistry , composite material , organic chemistry , naphthalene , engineering
The T g of polystyrene was raised by copolymerization with acenaphthylene. Although physical properties of S20A polymer equaled or surpassed those of polystyrene, the addition of butadiene, mineral oil, or isoprene to poly(styrene‐co‐acenaphthylene) drastically reduced the T g . The reduction of T g of S20A by the addition of butadiene was less severe when butadiene was added several hours after the polymerization had begun. The incompatible terpolymers were flexible but showed no improvement in craze resistance. Crazing has been explained as being caused by forces concentrated in regions of irregularities.