摘要
采用超声辐照原位乳液聚合方法制备了聚苯乙烯(PS)包覆多壁碳纳米管(MWNTs)复合材料.用TEM,FTIR,UV,XPS,GPC和TGA研究了复合材料的结构和性能.结果表明,MWNTs对苯乙烯聚合过程具有抑制作用,聚苯乙烯包覆MWNTs,两者之间有较强的相互作用,使复合材料的热性能得到改善,起始分解温度从388℃提高到422℃.
Polystyrene-encapsulated multi-walled carbon nanotubes （MWNTs） composites were prepared by ultrasonically initiated in situ emulsion polymerization. The structure and properties of the obtained composites were investigated by TEM, FTIR, UV, XPS and GPC etc.. The results show that the in situ formed PS layers were encapsulated on the surface of MWNTs and there were strong interactions between them. Element oxygen was found to be introduced onto the surface of MWNTs during the polymerization process. Meanwhile, MWNTs also consumed the macromolecular free radicals generated nearby, leading to the transfer of PS macromolecular chains onto the surface of MWNTs and the termination of polymerization process. As a result, the relatively lower molecular weight and broader molecular weight distribution of the formed PS occurred in the obtained composites. TGA analyses proved that the thermal properties of the PS/MWNTs composites were greatly improved.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第3期571-574,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:50303011)
教育部优秀青年教师资助计划资助
关键词
碳纳米管
聚苯乙烯
超声波
原位乳液聚合
复合材料
Carbon nanotube
Polystyrene
Ultrasonic wave
In situ emulsion polymerization
Composite material
