中国塑料 ›› 2007, Vol. 21 ›› Issue (3): 67-72.

• 加工与应用 • 上一篇    下一篇

聚氧化乙烯改性聚甲醛力学性能及摩擦磨损性能的研究

白时兵,刘靖琳,王琪*
  

  1. 高分子材料工程国家重点实验室(四川大学),四川大学高分子研究所,四川成都610065
  • 出版日期:2007-03-26 发布日期:2021-04-20

Study of Mechanical Properties and Friction and Wear Behavior of PEO Modified POM

BAI Shi-bing,LIU Jing-lin,WANG Qi *#br#   

  1. The State Key Lab of Polymer Materials Engineering,Polymer Research Institute of Sichuan University, Chengdu 610065, China
  • Online:2007-03-26 Published:2021-04-20

摘要: 利用聚氧化乙烯( PEO)同时改善了聚甲醛( POM)的缺口冲击性能和摩擦磨损性能。实验结果表明,PEO可使POM的缺口冲击强度和断裂伸长率增加,摩擦系数和磨痕宽度减小。改善POM摩擦磨损性能的机理是在摩擦的过程中,PEO在摩擦界面形成润滑层。研究了PEO相对分子质量和添加量的影响。当PEO相对分子质量为5.0x 105、含量为5%(质量%)时,共混物有优良的综合性能,缺口冲击强度达12.9kj/m2,比纯POM增大一倍;拉伸强度下降不大;摩擦系数和磨痕宽度分别为0.18和3.5mm,比纯POM分别下降50%和35%。

关键词: 聚甲醛, 聚氧化乙烯, 力学性能, 摩擦磨损性能

Abstract: In this paper, the impact, friction and wear properties of POM were improved via blending with PEO. When PEO(molecular weight 5.0x105) content was 5%, the blend achieved a notched impact strength of 12.9kJ/m2 two-folds that of neat POM, and the friction coefficient and the wear scar width were 0.18 and 3.5 mm,about 50% and 35 % that of neat POM, respectively. It was sug gested that PEO form a surface lubricating layer on the blends and thus decreased the wear scar width and the friction coefficient.

Key words: polyoxymethylene, polyethylene oxide, mechanical property, friction and wear behavior

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