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Bridging the PE lifetime under fatigue and creep conditions with its crystallization behavior
Author(s) -
Kadota K.,
Chum S.,
Chudnovsky A.
Publication year - 1993
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.1993.070490512
Subject(s) - creep , materials science , crystallization , kinetics , composite material , scaling , polyethylene , thermodynamics , mathematics , physics , geometry , quantum mechanics
The service lifetime for several linear polyethylene copolymers was studied by fatigue‐type accelerated tests. The material morphology and crystallization behavior were correlated with the lifetime and the failure modes. The correlation is based on the rate constant of material degradation (RCMD) recently introduced by the authors within a mathematical model for crack layer growth kinetics. RCMD is found to depend on the loading conditions (e.g., creep or fatigue) and on material morphology reflected in crystallization kinetics. The ratio of RCMDs for fatigue and creep is a scaling factor that allows one to correlate fatigue and creep lifetimes. The dependence of the RCMD's ratio on the morphological features associated with the primary and secondary crystallization kinetics is also reported in this paper. © 1993 John Wiley & Sons, Inc.