中国塑料 ›› 2019, Vol. 33 ›› Issue (2): 35-39.DOI: 10.19491/j.issn.1001-9278.2019.02.007

• 材料与性能 • 上一篇    下一篇

马来酸酐接枝PS对PS/PLA共混体系发泡行为的影响

王亚桥,江翰川,霓敬越,陈剑泽,王向东*   

  1. 北京工商大学
  • 收稿日期:2018-09-28 修回日期:2018-10-14 出版日期:2019-02-26 发布日期:2019-03-26
  • 基金资助:
    国家自然科学基金;国家重点研发计划

Effect of Maleic Anhydride Grafted PS on the Foaming Behavior of PS/PLA Blends

  • Received:2018-09-28 Revised:2018-10-14 Online:2019-02-26 Published:2019-03-26
  • Supported by:
    国家自然科学基金(51673004);国家重点研发计划(2016YFB0302203、2016YFB0302205)

摘要: 通过熔融共混法制备PS/PLA共混物,研究了PLA和马来酸酐接枝PS(PS-g-MAH)含量对PS/PLA共混体系的CO2溶解度、流变行为、相态结构以及发泡行为的影响。结果表明,PLA可以有效提高PS/PLA共混体系的CO2溶解度,当PLA含量为25份(质量份,下同)时,CO2溶解度比PS提高了22 %;PS-g-MAH的加入,显著改善PS/PLA共混体系的相容性,减小分散相的粒径,以及降低PS/PLA共混体系的泡沫密度。

Abstract: PS/PLA blends were prepared by melt blending, and the effects of PLA content and maleic-anhydride (MAH)-grafted PS on the solubility of CO2, rheological behavior, phase structure and foaming behavior of the blends were investigated. The results indicated that the solubility of CO2 in PS/PLA blends was effectively improved by PLA, and its solubility increased by 22 % with the addition of 25 phr PLA compared to that in pure PS. The addition of MAH-g-PS significantly enhanced the compatibility of PLA and PS, thus reducing the particle size of dispersed phase and the foam density of PS/PLA blends.