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Application of time–temperature–stress superposition principle on the accelerated physical aging test of polycarbonate
Author(s) -
Jiang Chengkai,
Jiang Han,
Zhu Zhongmeng,
Zhang Jianwei,
Guo Shaoyun,
Xiong Ying
Publication year - 2015
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.24106
Subject(s) - materials science , superposition principle , polycarbonate , time–temperature superposition , arrhenius equation , composite material , stress (linguistics) , accelerated aging , term (time) , tensile testing , ultimate tensile strength , elongation , polymer , activation energy , mathematics , mathematical analysis , linguistics , philosophy , chemistry , organic chemistry , physics , quantum mechanics
The effect of physical aging on the polymer mechanical properties is very important for long‐term safety assessment of engineering application. In this paper, the physical aging tests of polycarbonate (PC) were conducted systemically under different temperature and uniaxial tensile stress level. It was shown that both temperature and stress have obvious accelerated effect on the physical aging of PC. The higher the temperature and stress level are, the faster the aging process is. To predict the long‐term behavior after physical aging using the short‐term test results of PC, the elongation‐at‐break was chosen as the index of the severity of physical aging. An Arrhenius‐type time–temperature–stress superposition principle (TTSSP) was proposed to evaluate long‐term performance using short‐term test data. Using the proposed method, time and cost can be dramatically reduced for the assessment of long‐term physical aging performance of polymeric material. POLYM. ENG. SCI., 55:2215–2221, 2015. © 2015 Society of Plastics Engineers