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Effect of thermal aging on impact strength acrylonitrile‐butadiene‐styrene (ABS) terpolymer
Author(s) -
Wolkowicz Michael D.,
Gaggar Satish K.
Publication year - 1981
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760210910
Subject(s) - materials science , differential scanning calorimetry , acrylonitrile butadiene styrene , composite material , copolymer , izod impact strength test , accelerated aging , brittleness , natural rubber , degradation (telecommunications) , layer (electronics) , styrene , surface layer , ultimate tensile strength , polymer , computer science , thermodynamics , telecommunications , physics
A high speed puncture impact apparatus was used to measure impact loss in thermally aged ABS (acrylonitrilebutadiene‐styrene) as a function of time and temperature. Impact energy values decreased to a low level and degraded surface layer thickness increased as a function of aging time at three aging temperatures. Systematic removal of surface layers from thermally aged samples progressively increased impact energy values to control levels. Infrared spectroscopy, differential scanning calorimetry and molecular weight data indicate that degradation occurs in the rubber, graft and rigid phases at different times during the thermal aging period. Microscopy results show a critical degraded layer thickness which causes brittle failure of the entire sample.