新型非对称双螺杆挤出制备PPC/PTFE共混物及其超临界CO2发泡行为研究

doi:10.19491/j.issn.1001-9278.2017.12.015

中国塑料 ›› 2017, Vol. 31 ›› Issue (12): 84-89.DOI: 10.19491/j.issn.1001-9278.2017.12.015

新型非对称双螺杆挤出制备PPC/PTFE共混物及其超临界CO₂发泡行为研究

李哲星¹,彭响方¹,陈凤朗¹,范显琪¹,徐百平²,陈斌艺¹

1. 华南理工大学
2. 广东轻工职业技术学院广东高效高分子材料加工工程技术开发中心

收稿日期:2017-07-21 修回日期:2017-08-08 出版日期:2017-12-26 发布日期:2017-12-29
基金资助:
国家自然科学基金项目;广州市科技计划项目;广东省科技计划项目; 广东省高等职业院校珠江学者岗位计划资助项目;华南理工大学中央高校面上项目

Preparation of Poly(propylene carbonate)/Polytetrafluoroethylene Blends and Their Foaming Behaviors through Supercritical CO₂

Received:2017-07-21 Revised:2017-08-08 Online:2017-12-26 Published:2017-12-29

摘要/Abstract

摘要： 采用新型同向非对称双螺杆挤出机制备了聚碳酸亚丙酯（PPC）/聚四氟乙烯（PTFE）共混物，分析了PTFE在PPC基体中的分散性，并通过超临界流体发泡技术，探讨了PTFE填料对PPC发泡材料泡孔结构的影响。结果表明，新型同向非对称双螺杆挤出机的高效混合特性有利于增强PTFE在PPC基体中的分散；PTFE作为成核剂，可减小复合材料微孔发泡的泡孔尺寸，增加泡孔密度，当PTFE含量为3 %（质量分数，下同）时，泡孔密度比纯PPC大幅度提高，达到4.75×107个/cm3，平均泡孔直径约为2 μm。

Abstract: Poly(propylene carbonate)(PPC)/polytetrafluoroethylene(PTFE) blends were prepared by using an asymmetrical co-rotating twin-screw extruder. Dispersion of PTFE in the PPC matrix was analyzed. Then, the PPC/PTFE blending foams were prepared by using supercritical CO2 as a forming agent, and their foaming behaviors were studied. The results indicated that the dispersion of PTFE was improved significantly due to the utilization of such a new type of twin-screw extruders. PTFE could also act as a nucleating agent to reduce the cell size and increase the cell density remarkably when the blending foams were prepared. The blending foams containing 3 wt % PTFE achieved a minimum cell size of 2 μm and a maximum cell density of 4.75×107 cells/cm3.

李哲星彭响方陈凤朗范显琪徐百平陈斌艺. 新型非对称双螺杆挤出制备PPC/PTFE共混物及其超临界CO₂发泡行为研究[J]. 中国塑料, 2017, 31(12): 84-89.

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新型非对称双螺杆挤出制备PPC/PTFE共混物及其超临界CO₂发泡行为研究

Preparation of Poly(propylene carbonate)/Polytetrafluoroethylene Blends and Their Foaming Behaviors through Supercritical CO₂

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