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Mechanical behavior of some lightly crosslinked rubbers
Author(s) -
Nielsen Lawrence E.
Publication year - 1964
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.1964.070080134
Subject(s) - creep , materials science , swelling , composite material , natural rubber
The creep and dynamic mechanical properties of rubbers with a wide range of degree of crosslinking have been correlated with the swelling properties of the rubbers. Both butyl and styrene–butadiene rubbers were studied. Mechanical damping steadily decreases as the crosslinking increases. A damping test could replace the usual swelling tests as a measure of the tightness of the network structure. Lightly crosslinked rubbers have a minimum in the damping‐temperature curve while highly crosslinked rubbers do not. Very small degrees of crosslinking dramatically decrease the creep rate, however, even for highly crosslinked rubbers, creep does not completely stop. The Nutting equation often gives a very good correlation between damping and creep rate.