中国塑料 ›› 2016, Vol. 30 ›› Issue (10): 14-19 .DOI: 10.19491/j.issn.1001-9278.2016.10.003

• 材料与性能 • 上一篇    下一篇

聚碳酸亚丙酯/纳米二氧化硅共混体系流变及发泡性能研究

汪扬烨,何亚东,信春玲,杨兆平,康凯   

  1. 北京化工大学
  • 收稿日期:2016-07-11 修回日期:2016-08-24 出版日期:2016-10-26 发布日期:2016-10-26

RheologicalProperties and Foaming Performance of PPC/Nano-SiO2 Systems

  • Received:2016-07-11 Revised:2016-08-24 Online:2016-10-26 Published:2016-10-26

摘要: 通过同向双螺杆挤出机对聚碳酸亚丙酯/纳米二氧化硅(PPC/nano-SiO2)体系共混造粒,利用旋转流变仪对其流变性能进行了表征,并采用间歇发泡装置进行发泡实验,研究了nano-SiO2含量对PPC流变及发泡性能的影响。结果表明,当nano-SiO2添加量为5份(质量份,下同)时,nano-SiO2与PPC之间形成了逾渗网络,并且此时发泡样品泡孔平均直径最小,达到9.65μm;泡孔密度最大,达到2.37×10^9个/cm3;泡孔直径分布最窄且泡孔结构均匀。

关键词: 聚碳酸亚丙酯, 纳米二氧化硅, 流变性能, 发泡

Abstract: The compounding systems based on propylene carbonate(PPC) and silica nanoparticles (nano-SiO2) were fabricated by usinga co-rotating twin-screw extruder, and their rheological properties werecharacterized by dynamic rheometer. The batch foaming process was conducted toinvestigate the effect of nano-SiO2 content on the rheological andfoaming properties of PPC/nano-SiO2 systems. The results indicatedthat a percolated network was formed at a nano-SiO2 content of 5phr, which led to the finest cell diameter of 9.65μm, the highestcell density of 2.37×10^9cells/cm3, the narrowest distribution of cell diameter, and the mostuniform cell structure.

Key words: propylene carbonate, silicon nanoparticle, rheological behavior, foaming