应用化学 ›› 1998, Vol. 0 ›› Issue (4): 49-53.

• 研究论文 • 上一篇    下一篇

EAA增容LLDPE/SAN共混物的形态及力学性能

徐胜清, 刘卫东, 董丽杰, 黄葆同   

  1. 中国科学院长春应用化学研究所 长春 130022
  • 收稿日期:1997-10-22 修回日期:1998-02-16 出版日期:1998-08-10 发布日期:1998-08-10
  • 基金资助:
    国家自然科学基金;中国科学院长春应用化学研究所高分子物理开放实验室科研基金

Studies on Morphology and Mechanical Properties of LLDPE/SAN Blend Compatibilized by EAA

Xu Shengqing, Liu Weidong, Deng Lijie, Huang Baotong   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1997-10-22 Revised:1998-02-16 Published:1998-08-10 Online:1998-08-10

摘要: 采用SEM及力学性能测试等方法,研究了乙烯-丙烯酸共聚物(EAA)含量对其增容线性低密度聚乙烯(LLDPE)/苯乙烯-丙烯腈共聚物(SAN)共混物形态及性能的影响.发现少量的EAA可使共混物中SAN相的相尺寸减小,共混物模量、拉伸强度及断裂伸长率提高.当EAA的含量增加至11.7%时,它在共混物中两相界而的分布达到饱和,即增容剂饱和浓度Cs=11.7%;此时,共混物形态及性能的变化趋势出现明显转折.明显过量的EAA主要起增韧作用.EAA的增容机理为,它与LLDPE组分的非晶区可部分相容,同时又与SAN相存在着分子间特殊作用.

关键词: 线性低密度聚乙烯, 苯乙烯-丙烯腈共聚物, 共混物, 乙烯-丙烯酸共聚物, 增容作用

Abstract: The influence of the amount of ethylene-acrylic acid random copolymer(EAA) onchanical properties measurements.The results show that the addition of a small amount ofEAA leads to a decrease in domain size of the SAN phase and an increase in modulus, tensilestrength and elongation at break.When the amount of EAA(c) is up to about 11.7% (massfraction), the saturated concentration(c.), that is, the POint of inter facial saturation on the SAN phase, is reached.When c is much higher than Cs, the excess EAA acts mainly as atoughening agent of the LLDPE/SAN blends.The compatibilizing effect of EAA is due topartial compatibility of the amorphous phases of EAA and LLDPE, and the specific interaction between EAA and SAN.

Key words: linear low-density polyethylene, styrene-acrylonitrile copolymer, blend, ethyleneacrylic acid copolymer, compatibilization