纳米CaCO_3添加量对其改性聚丙烯复合材料发泡效果及力学性能的影响  

Effects of Nano-CaCO_3 Addition on Foamed Effect and Mechanical Properties of Polypropylene Composite Modified by Nano-CaCO_3

作　　者：孙初锋[1,2] 王彦斌[1] 曾亮[1] 王爱军[1] 

机构地区：[1]西北民族大学化工学院,兰州730030 [2]中科院兰州化学物理研究所固体润滑国家重点实验室,兰州730000

出　　处：《机械工程材料》2014年第2期68-71,共4页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(51167017)

摘　　要：采用超临界流体技术制备出纳米CaCO3改性聚丙烯复合材料,研究了纳米CaCO3添加量对复合材料发泡效果、力学性能以及CaCO3和聚丙烯共混物流变性能的影响。结果表明:随纳米CaCO3添加量的增多,复合材料的发泡效果先变好再变差,而拉伸强度和冲击韧度均先升后降,当纳米CaCO3质量分数为5%时,复合材料的发泡效果最佳,拉伸强度和冲击韧度最大,分别为16MPa和37kJ·m-2;在250℃时,随着纳米CaCO3添加量的增大,共混物的表观黏度逐渐减小。Nano-CaCO3 modified polypropylene composites were prepared using supercutical fluid technology, and the effects of nano-CaCO3 on foamed effect and mechanical properties of the composite, and on the theological property of blend including CaCO3 and polypropylene were studied. The results show that the foamed effect of the composite was first good and then poor, and the tensile strength and impact toughness all increased and then decreased with the increase of nano-CaCO3 addition. When the addition of nano-CaCO3 was 5wt%, the composite had the best foamed effect and mechanical properties, the tensile strength and impact toughness were 16 MPa and 37 kJ· m-2 , respectively. The apparent visconsity of the blend decreased gradually with the increase of the nano- CaCOa addition at 250 ℃.

关 键 词：聚丙烯 纳米碳酸钙 复合材料 发泡效果 力学性能 

分 类 号：TQ328.9[化学工程—合成树脂塑料工业]