应用化学 ›› 1995, Vol. 0 ›› Issue (6): 65-67.

• 研究论文 • 上一篇    下一篇

聚甲醛和聚氨酯共混物的微观结构与力学性能

徐卫兵, 朱士旺, 蔡琼英   

  1. 合肥工业大学化工学院, 合肥 230009
  • 收稿日期:1995-01-18 修回日期:1995-07-03 出版日期:1995-12-10 发布日期:1995-12-10
  • 基金资助:
    国家“八五”重点科技攻关项目,国家自然科学基金资助项目

Microstructure and Mechanical Pioperties of Polyoxymethylene and Polyurethane Blends

Xu Weibing, Zhu Shiwang, Cai Qiongying   

  1. Institute of Chemical Engineering, Hefei University of Technology, Hefei 230009
  • Received:1995-01-18 Revised:1995-07-03 Published:1995-12-10 Online:1995-12-10

摘要: 聚甲醛(POM)是60年代发展起来的新型工程塑料,具有高密度、高结晶性,且坚硬、耐磨、自润滑、耐疲劳等优点,广泛应用于机械、汽车、电子电器等领域,替代有色金属和合金.但其冲击强度较差,缺口敏感性大,自问世以来人们一直对POM进行增容增韧改性或成核改性,以扩大POM的应用领域.本文通过与聚氨醋弹性体的共混改性,研究其微观结构与力学性能.

关键词: 聚甲醛, 聚氨酯, 共混物, 微观结构, 力学性能

Abstract: The microstructure of polyoxymethylene(POM)/polyurethane( PU)/ethylene-vinylacetate copolymer blends were analyzed by SEM, DSC and WAXD techniques,andtheir mechanical properties were measured.The results showed that the addition of PUcaused the decrease of Tm and crystallinity of blends,the increase of the crystallite size L110 and the cell parameters of the blends,the decrease of the tensile strength and the appearanceof peak value in notched impact strength.Crystallite size L110 between 10.86nm and 14.87nmled to modified POM with good balanced mechanical properties.

Key words: polyoxymethylene, polyurethane, blend, microstructure, mechanical property