Structural and Tribological Properties of Polytetrafluoroethylene Composites Filled with Glass Fiber and Al2O3 in Atomic Oxygen Environment

被引：5
作者：
Liu, Baixing [1 ,2 ]
Pei, Xianqiang [1 ]
Wang, Qihua [1 ]
Wang, Tingmei [1 ]
Sun, Xiaojun [1 ]
机构：
[1] Chinese Acad Sci, State Key Lab Solid Lubricat, Lanzhou Inst Chem Phys, Lanzhou 730000, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
来源：
JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS | 2012年 / 51卷 / 11期
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
atomic oxygen; degradation; polytetrafluoroethylene; tribological properties; LOW-EARTH-ORBIT; SPACE ENVIRONMENT; IRRADIATION; RADIATION; SURFACE; DEGRADATION; ULTRAVIOLET; POLYIMIDE; FRICTION; BEHAVIOR;
D O I：
10.1080/00222348.2012.669692
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Effects of atomic oxygen (AO) irradiation on the structural and tribological behaviors of polytetrafluoroethylene (PTFE) composites filled with both glass fibers and Al2O3 were investigated in a ground-based simulation facility, in which the average energy of AO was about 5 eV and the flux was 5.0 x 10(15)/cm(2) s. It was found that AO irradiation first induced the degradation of PTFE molecular chains on the sample surface, and then resulted in a change of surface morphology. The addition of Al2O3 filler significantly increased the AO resistance property of PTFE composites. Friction and wear tests indicated that AO irradiation affected the wear rate and increased the friction coefficient of specimens. The PTFE composite containing 10% Al2O3 exhibit the best AO resistance and lower wear rate after long time AO irradiation.
引用
收藏
页码：2245 / 2254
页数：10
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