纳米CaCO3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

机械工程材料, 2014, 38(2): 68-71.

纳米CaCO3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

孙初锋 ^1, , 王彦斌 ^2, , 曾亮 ^3, , 王爱军 ^4,

1.西北民族大学化工学院,兰州730030;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

2.西北民族大学化工学院,兰州730030

3.西北民族大学化工学院,兰州730030

4.西北民族大学化工学院,兰州730030

基金项目: 国家自然科学基金资助项目(51167017)

关键词：聚丙烯 , 纳米碳酸钙 , 复合材料 , 发泡效果 , 力学性能

Effects of Nano-CaCO3 Addition on Foamed Effect and Mechanical Properties of Polypropylene Composite Modified by Nano-CaCO3

SUN Chu-feng ^1, , WANG Yan-bin ^2, , ZENG Liang ^3, , WANG Ai-jun ^4,

1.西北民族大学化工学院,兰州730030;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

2.西北民族大学化工学院,兰州730030

3.西北民族大学化工学院,兰州730030

4.西北民族大学化工学院,兰州730030

Keywords： polypropylene (PP) , nano-CaCO3 , composite , foamed effect , mechanical property

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16 MPa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.

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