摘要
通过原位悬浮聚合法制备聚苯乙烯(PS)/纳米二氧化铈(CeO2)复合材料。红外光谱分析表明,复合材料中CeO2粒子的红外吸收存在蓝移现象。采用凝胶渗透色谱仪、差示扫描量热仪、热失重仪和毛细管流变仪等对PS/纳米CeO2复合材料的分子量、玻璃化转变温度、热稳定性及流动性能进行了表征。研究发现,随着纳米CeO2用量的增加,复合材料的分子量呈先升高后降低的趋势,玻璃化转变温度及熔体表观粘度有所升高,热稳定性得到很大提高。
Polystyrene/nano-CeO_~2 composites are produced by in situ suspension polymerization. FT-IR results show that the absorption band of CeO_~2 becomes blue shift. The molecular weight, glass transition temperature (T_g), thermal stability and rheology properties of polystyrene/nano-CeO_~2 composites are also characterized by means of GPC, DSC, TGA and capillary rheometer respectively. Testing results show that increasing the content of nano-CeO_~2 in the composites results in the raising of T_g and melt apparent viscosity, while the molecular weight increases at first and then decreases. In addition, the thermal stability of the composites is greatly improved.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2005年第3期57-60,共4页
Engineering Plastics Application
基金
国家"863"计划项目(2002AA302616)
上海市纳米科技研究开发与产业化专项(0219nm039)
