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Aging of pressure‐sensitive adhesives III. Studies of surface oxidation with multidetector size exclusion chromatography
Author(s) -
Harrison Daniel J.,
Yates W. Ross,
Johnson Julian F.
Publication year - 1986
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.1986.070310523
Subject(s) - isoprene , copolymer , adhesive , styrene , size exclusion chromatography , degradation (telecommunications) , materials science , oxygen , induction period , surface pressure , chemical engineering , polymer chemistry , chemistry , composite material , organic chemistry , polymer , catalysis , layer (electronics) , telecommunications , physics , computer science , mechanics , engineering , enzyme
The use of multidetector size exclusion chromatography is described for studying oxidation in styrene‐isoprene‐styrene block copolymer films. It is shown that exposure of these films to atmospheric oxygen causes surface oxidation of the isoprene midblocks and that the antioxidant system used is incapable of preventing this. Higher temperature exposure initially merely accelerates the surface reaction but is followed after an induction period by severe bulk‐phase degradation. The implications of ambient temperature surface oxidation of SIS‐based pressure‐sensitive adhesives are discussed.