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Prediction of mechanical behavior of plastics undergoing decomposition from the combined effects of environmental exposure and stress
Author(s) -
Goldfein S.
Publication year - 1966
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.1966.070101112
Subject(s) - materials science , composite material , polyester , degradation (telecommunications) , chemical decomposition , stress (linguistics) , decomposition , cellulose , glass fiber , chemistry , organic chemistry , telecommunications , linguistics , philosophy , computer science
A study was made to determine whether the behavior of plastics undergoing breakdown from the effects of stress, elevated temperatures, and chemical attack could be predicted by means of a mechanical‐chemical equation of state. Five systems were studied, the first four of which were tested for retention of strength at room temperature after environmental exposure: ( a ) glass‐reinforced polyester laminate exposed to an alkaline medium at elevated temperatures; ( b ) cellulose laminate exposed to elevated temperatures, resulting in oxidative degradation; ( c ) paper‐phenolic laminate exposed to elevated temperatures, resulting in further crosslinking followed by oxidative degradation; ( d ) heat‐resistant glass fiber polyester resin laminate exposed to very high degradative temperatures; and ( e ) same material and treatment as ( d ) except that the specimens were under stress during the exposure (stress rupture). It is concluded that the effects of the various environments on the mechanical properties of the plastics under study can be predicted accurately by use of a parameter of the equation of state representing a second‐order chemical reaction.