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Thermal strain of high strength polyethylene fiber in low temperature
Author(s) -
Yamanaka Atsuhiko,
Kitagawa Tooru,
Tsutsumi Masayuki,
Kashima Toshihiro,
Fujishiro Hiroyuki,
Ema Kimiko,
Izumi Yoshinobu,
Nishijima Shigehiro
Publication year - 2004
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.20890
Subject(s) - materials science , thermal expansion , composite material , crystallinity , polyethylene , fiber , modulus , ultimate tensile strength , atmospheric temperature range , young's modulus , thermomechanical analysis , elastic modulus , amorphous solid , thermodynamics , crystallography , chemistry , physics
High strength polyethylene fiber (Toyobo, Dyneema® fiber: hereinafter abbreviated to DF) has a negative thermal expansion coefficient. Relation between fiber structure and thermal strain of DF used as reinforcement of DF reinforced plastic (DFRP) for cryogenic use was investigated. The crystallinities and orientation angles of several kinds of polyethylene fibers having different modulus from 15 to 134Gpa (herein after abbreviated to DFs) were measured by NMR and X‐ray. We obtained the parameters of the mechanical series‐parallel model composed of crystal and amorphous by crystallinity and modulus. Thermal expansion coefficients of DFs were estimated by mechanical series‐parallel model. All DFs having different modulus showed negative thermal expansion coefficients in the temperature range from 180 to 300K, and absolute values of those markedly increased by increasing tensile modulus of DF. The estimated thermal expansion coefficients showed negative values, and thermal strains showed a similar curve to observed ones mostly. Average thermal expansion coefficients in the temperature range from 180 to 300K estimated by mechanical model agreed with the observed ones. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 2918–2925, 2004