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›› 2004, Vol. 4 ›› Issue (4): 347-351.

• 材料专栏 • 上一篇    下一篇

PVC的微发泡处理及PVC/CaCO3的原位复合

熊传溪,董丽杰,汪庆刚,王涛,鲁圣军,向妮娅   

  1. 武汉理工大学材料学院
  • 出版日期:2004-08-20 发布日期:2004-08-20

Preparation of Microporous PVC and in Situ Composite Technology of PVC/CaCO3

XIONG Chuan-xi,DONG Li-jie,WANG Qing-gang,WANG Tao,LU Sheng-jun,XIANG Ni-ya   

  1. School of Materials Science and Engineering, Wuhan University of Technology
  • Online:2004-08-20 Published:2004-08-20

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被引次数

29

摘要： 研究了用原位生成法制备PVC/纳米CaCO3复合母粒的过程. 首先利用混合溶剂将PVC粉料溶胀，同时带入发泡剂偶氮二异丁腈，在112oC下进行固相微发泡. 利用已发泡的PVC，采用原位生成法制备了纳米CaCO3/PVC复合母粒. 通过扫描电镜观察，发现已发泡PVC颗粒表面布满微孔，纳米级CaCO3填充在PVC孔洞里. PVC/纳米CaCO3复合母粒同时起到了增韧增强的作用.

关键词: 聚氯乙烯, 复合母粒, 微孔PVC/纳米CaCO3

Abstract: This article describes the preparation of PVC/nanometer CaCO3 composite particles by an in situ method. Porous polyvinyl chloride (PVC) particles were swelled by compound solvent with foaming agent 2,2￠-azo- bis-iso-butyronitrile (AIBN). When heated at 112oC, PVC particles were foamed because AIBN decomposed to gas. When the volume percentage of cyclohexanone in compound solvent reaches 11.7%, the porosity of microporous PVC increases to the maximum of 35.9%. Microporous PVC, Ca(OH)2 and some additives were dispersed uniformly in water and then aerated with CO2, thus PVC/nano-CaCO3 composite particles was prepared by this in situ method. Chemical analysis indicated that the maximal content of synthesized CaCO3 reached 20%. SEM micrographs show that microporous PVC particles had many cavities and nanometer CaCO3 were filled in these cavities at the same time. It is inferred that nanometer CaCO3/PVC mixture toughens and reinforces PVC.

Key words: PVC, composite particle, microporous PVC/nanometer CaCO3