Application of time–temperature–stress superposition principle on the accelerated physical aging test of polycarbonate |
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| Authors: | Chengkai Jiang Han Jiang Zhongmeng Zhu Jianwei Zhang Shaoyun Guo Ying Xiong |
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| Affiliation: | 1. School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, China;2. State Key Laboratory of Polymer Materials Engineering, Polymer Institute of Sichuan University, Chengdu, China |
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| Abstract: | 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 |
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