摘要
采用熔融共混法制备PMMA接枝改性纳米CaCO3增韧PVC(PVC/CaCO3)复合材料,并研究了复合材料的力学性能。结果表明,通过表面PMMA的接枝改性,可以显著提高纳米CaCO3增韧聚氯乙烯复合材料的拉伸强度和拉伸模量,在纳米CaCO3颗粒表面PMMA包覆层厚度为2 nm时,复合材料的拉伸强度和拉伸模量达到极大值。对比于未处理纳米CaCO3和钛酸酯偶联剂处理纳米CaCO3,PMMA接枝改性纳米CaCO3增韧PVC复合材料的拉伸强度得到较大幅度提高。SEM显示,经过PMMA接枝改性后的碳酸钙在PVC基体中分散均匀,与基体界面结合良好。
Nano-CaCO3 particle reinforced PVC composites were prepared by filling CaCO3 nanoparticles which had been graft-modifed with PMMA in PVC matrix by melt-blend of methods, and their mechanical properties were analyzed. The results indicated that there was a critical coating thichenss 2 nm when CaCO3 was modified with PMMA. Compared to composites prepared by filling CaCO3 untreated or treated with titanate coupling agent in PVC, tensile strength of PVC/ CaCO3 composites filled PMMA graft modified nano-CaCO3 increased much more. The nano-CaCO3 can disperse uniformity in PVC in nano scale, investigated by SEM.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2005年第3期378-382,共5页
Journal of Functional Polymers
基金
上海市重大基础研究项目(04DZ14002)
国家自然科学基金重点(20236020)
国家基础研究重大项目前期研究专项(2002CCA02200)
上海市重点实验室专项基金(04DZ05622)
上海市纳米科技专项等支持
