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Degradation of polystyrene by shear stress in isopropylphenyl phosphate solution
Author(s) -
Netopilík Miloš,
Kubín Miroslav,
Vohlídal Jiří,
Kössler Ivo,
KratochvíL Pavel
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.1990.070400704
Subject(s) - polystyrene , degradation (telecommunications) , chain scission , phosphate , chain (unit) , stress (linguistics) , shear (geology) , materials science , shear stress , chemistry , polymer chemistry , composite material , physics , organic chemistry , polymer , computer science , telecommunications , linguistics , philosophy , astronomy
The molecular weight distribution functions of polystyrene degraded by shear stress in isopropylphenyl phosphate solution were compared with the calculated ones, obtained by assuming that up to a certain distance from each chain end the probability of bond scission is zero. Two phenomenological models were proposed for the probability of degradation in the central part of the chain. A comparison with experimental data suggests that the probability of degradation increases towards the center of the chain. Branched fractions formed by degradation in the presence of air were found to be present by the GPC method with on‐line viscometric detection.