Effect of Thermal Oxidative Aging on the Structure and Properties of Poly(ether-ether-ketone)

被引：0
|
作者：
Ding R. [1 ,2 ]
Cao D. [3 ]
Xu L. [1 ]
Wang Z. [1 ]
Li J. [3 ]
Ma H. [1 ]
机构：
[1] Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai
[2] University of Chinese Academy of Sciences, Beijing
[3] CGN-DELTA (Taicang) Testing Technology Co., Ltd., Suzhou
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2021年 / 37卷 / 04期
关键词：
Chemical structure; Crystallization behavior; Poly(ether-ether-ketone); Thermal oxidative aging; Thermal stability;
D O I：
10.16865/j.cnki.1000-7555.2021.0108
中图分类号：
学科分类号：
摘要：
Poly(ether-ether-ketone) (PEEK) is widely used as engineering material in many fields. It is of great significance for its service optimization to study the thermal oxidative aging of PEEK. Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), differential scanning calorimetry (DSC) and a universal tension machine were used to test the variation of different time of thermal oxidative aging on the chemical structure and properties of PEEK sheets at 310℃. The results show that no new infrared absorption peaks appear in the FT-IR spectra within the aging time range; XPS spectra show that oxidation products were formed on the surface of the samples and the oxidation degree reaches the maximum after aging time for 168 h. The crystallization temperature, melting enthalpy and crystallinity of the samples decrease with the increasing aging time, and the crystallinity decreases to 9.7% after aging time for 504 h. The elongation at break of the samples decreases with the increasing aging time. The tensile stress increases within the range of 96 h of thermal oxidative aging, and then decreases gradually. ©2021, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：121 / 127
页数：6
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