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。
Expandable graphite was prepared from natural flake graphite via chemical oxidation and high temperature processing. Via in-situ polymerization of styrene in presence of expanded graphite polystyrene-expanded graphite （PS-EG） composites were obtained. Melt blending PS-EG with neat polystyrene leaded to polystyrene/polystyrene-expanded （PS/PS-EG） composites. The mechanical properties, thermal stability, and the microstructure of the composites were studied. The impact strength, and 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 PS/PS-EG composite, the cross section of the composites displayed a pinhole structure.
出处
《中国塑料》
CAS
CSCD
北大核心
2012年第3期88-91,共4页
China Plastics
关键词
聚苯乙烯
膨胀石墨
原位聚合
插层
复合材料
polystyrene
expanded graphite
in situ polymerization
intercalation
composite
