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Effect of humidity and elevated temperatures on physical properties of UV‐cured polymers
Author(s) -
Bolon Donald A.,
Lucas Gary M.,
Olson Daniel R.,
Webb Karen K.
Publication year - 1980
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.1980.070250402
Subject(s) - humidity , ultimate tensile strength , materials science , polymer , glass transition , composite material , moisture , relative humidity , polymer chemistry , chemical engineering , meteorology , physics , engineering
Many UV‐cured acrylates, epoxides, and thiol‐enes suffer a dramatic, reversible loss of tensile strength during exposure to moisture and/or elevated temperatures. Certain formulations are especially sensitive and lose up to 95% of their dry tensile strength in a humid environment. Glass transition temperatures of these materials are also much lower in high humidity than they are in low humidity. It is proposed that these losses of physical properties in high humidity are due to reduced intersegmental attractions of polymer chains caused by preferential hydrogen bonding to water.