摘要
将纳米碳酸钙（Nano-CaCO3）颗粒先从水相中转移至醇相中,再通过甲基丙烯酸处理,在颗粒表面包覆了既具离子键又具聚合反应活性的表面层.在稍高于100℃温度下,经该项处理后的纳米CaCO3固含量大于80%的滤饼能均匀分散于苯乙烯单体中,用原位本体聚合法制得纳米CaCO3/PS（聚苯乙烯）原位复合材料.TEM分析表明,原位复合材料中纳米CaCO3颗粒能均匀分散于基体中,粒径在100 nm以内,并由此提出分散相呈集散形貌的结构模型.纳米碳酸钙能对复合材料基体起到较好的增韧作用,含7%～8%纳米CaCO3的原位复合材料的冲击强度比纯PS提高158%.
CaCO3 nano-particles transferred from water phase into ethanol were treated by methacrylic acid to form reactive interface by ionic bonding. Well dispersed CaCO3 nano-particles in styrene obtained from the filtermass of treated CaCO3 nano-particles with solids content more than 80% at a temperature slightly higher than 100 ℃ were polymerized via in-situ bulk polymerization to produce nano-CaCO3/polystyrene composite. TEM images show that CaCO3 nano-particles with the sizes less than 100 nm were distributed homogeneously in polymer matrix. CaCO3 nano-particles can play a positive role to increase the toughness of composite material matrix, and the toughness of the composite with 7%-8% CaCO3 nano-particles can be improved up to 258% of pure polystyrene. The structure model of pool dispersion was proposed and used to explain the relationship between toughness and structure of the composite.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2007年第4期790-795,共6页
The Chinese Journal of Process Engineering
基金
上海市科委纳米专项基金资助项目(编号:0352nm045
0652nm039)
