中国塑料 ›› 2012, Vol. 26 ›› Issue (03): 88-91 .DOI: 10.19491/j.issn.1001-9278.2012.03.017

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PS-EG插层复合物制备及其改性聚苯乙烯的研究

侯桂香 姚少巍 桑晓明 唐 鹏 蒋 丽   

  1. 河北理工大学 河北联合大学
  • 收稿日期:2011-10-15 修回日期:2011-12-13 出版日期:2012-03-26 发布日期:2012-03-26

Preparation of Polystyrene-expanded Graphite Intercalated Complex and Its Modification on Polystyrene

Guixiang HOU Shaowei YAO Xiaoming SANG   

  • Received:2011-10-15 Revised:2011-12-13 Online:2012-03-26 Published:2012-03-26
  • Contact: Guixiang HOU

摘要: 通过化学氧化、高温处理将天然鳞片石墨制成膨胀石墨(EG),采用原位聚合法制备了聚苯乙烯-膨胀石墨(PS-EG)插层复合物,并将PS-EG复合物与PS进行熔融共混,研究了PS-EG复合物含量对PS结构及性能的影响。结果表明,PS-EG的加入,使得PS的冲击强度和热性能提高,而拉伸强度下降;当PS-EG含量为9 %(质量分数,下同)时,PS的冲击强度提高了63.4 %;EG在复合材料中呈蠕虫状分布;PS-EG复合物的存在增加了复合材料的界面效应,冲击断面呈现孔洞式结构。

关键词: 膨胀石墨, 聚苯乙烯, 原位聚合, 插层, 复合材料

Abstract: Expandable graphite was prepared from natural flake graphite via chemical oxidation and high temperature processing. Via situ polymerization of styrene in presence of expanded graphite polystyrene-expanded graphite (PS-EG) composites were obtained. Melt blending PS-EG with neat polystyrene leading to polystyrene/polystyrene-expanded (PS/PS-EG) composites. The mechanical properties, thermal stability, and the microstructure of the composites were studied. The impact strength,thermal stability were improved with the adding of PS-EG. Compared with the neat polystyrene, the impact strength of PS/PS-EG composites was improved 63.4 %, when the content of PS-EG was 9 %, however the tensile strength showed a large decreasing. Micro-analysis showed that expanded graphite dispersed homogeneously in the form of vermiculate in the composites, and the existence of PS-EG increased the interface effect of the PS/PS-EG composite, the cross section of composites displayed a pinhole structure.

Key words: expanded graphite, polystyrene, in situ polymerization, intercalation, composite

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