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Effect of absorbed water on dynamic modulus for short fiber–CR composites
Author(s) -
Ashida Michio,
Noguchi Toru,
Mashimo Satoshi
Publication year - 1984
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.1984.070291242
Subject(s) - materials science , composite material , fiber , nylon 6 , dispersion (optics) , composite number , absorption of water , synthetic fiber , polymer , physics , optics
Short fiber–elastomer composites with 10 vol % fiber, nylon 6–CR and PET–CR composites, absorbed water either in the moisture atmosphere or in water. The effect of absorbed water on the viscoelastic properties for these composites was investigated. The temperature dependence of tan σ for the nylon–CR composite showed that the α‐dispersion peak of nylon shifted to lower temperatures with increasing absorbed water content and that after displacement of the α‐dispersion peak the additional small hump appeared at about 90°C. For the PET composite, the α‐dispersion peak of PET shifted slightly to lower temperatures and the small shoulder at 90°C diminished with increasing absorbed water. The additional dispersion probably was caused by the interface between fiber and CR matrix and was independent of fiber orientation. The results suggested that nylon fiber absorbed a larger amount of water than CR matrix, while the water absorption for PET fiber was considerably less than for nylon fiber. The absorbed water in nylon fiber bonded stronger than that in CR matrix and was only slightly diminished by heat treatment under 100°C.