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
Effects of Nano-CaCO3 Addition on Foamed Effect and Mechanical Properties of Polypropylene Composite Modified by Nano-CaCO3
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16 MPa和37 kJ·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。
纳米碳酸钙
复合材料
发泡效果
力学性能
polypropylene (PP)
nano-CaCO3
composite
foamed effect
mechanical property
Abstract
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 rheological 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-CaCO3 addition at 250 ℃.
中图分类号 TQ328.9
所属栏目 材料性能及其应用
基金项目 国家自然科学基金资助项目(51167017)
收稿日期 2012/12/27
修改稿日期 2013/11/14
网络出版日期
作者单位点击查看
备注孙初锋(1977-), 男, 山东威海人, 副教授, 博士。
引用该论文: SUN Chu-feng,WANG Yan-bin,ZENG Liang,WANG Ai-jun. Effects of Nano-CaCO3 Addition on Foamed Effect and Mechanical Properties of Polypropylene Composite Modified by Nano-CaCO3[J]. Materials for mechancial engineering, 2014, 38(2): 68～71
孙初锋,王彦斌,曾亮,王爱军. 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[J]. 机械工程材料, 2014, 38(2): 68～71
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【3】卢子兴,邹波,李忠明,等.空心微珠填充聚氨酯泡沫塑料的力学性能［J］.复合材料学报, 2008, 25(6): 175-180.
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【7】NAM P H, MAITI P, OKAMOTO M, et al. Foam processing and cellular structure of polypropylene/clay nanocomposites［J］.Polymer Engineering＆Science,2002,42(9):1907-1918.
【8】MARK A T, JAMES P O. Processing of polypropylene-clay nanocomposites: single-screw extrusion with in-line supercritical carbon dioxide feed versus twin-screw extrusion［J］.Journal of Applied Polymer Science,2007,103(2):884-892.
【9】HUANG H X, WANG J K. Improving polypropylene microcellular foaming through blending and the addition of nano-calcium carbonate［J］. Journal of Applied Polymer Science,2007,106(1):505-513.
【10】JIANG X L, BAO J B, LIU T, et al. Microcellular foaming of polypropylene/clay nanocomposites with supercritical carbon dioxide ［J］. Journal of Cellular Plastics,2009,45(6):515-538.
【11】MARCELO A, IGNACIO V J, VERA R, et al. Study of the cellular structure heterogeneity and anisotropy of polypropylene and polypropylene nanocomposite foams［J］.Polymer Engineering＆Science,2009,49(12):2400-2413.
【12】ZHU B, ZHA W, YANG J, et al. Layered-silicate based polystyrene nanocomposite microcellular foam using supercritical carbon dioxide as blowing agent［J］.Polymer,2010,51(10):2177-2184.
【13】曹太山,何力,张纯, 等.纳米蒙脱土对聚丙烯微孔发泡行为的影响［J］.塑料, 2009, 38(6): 28-30.
【14】许忠斌, 吴舜英, 黄步明, 等.微孔塑料注射成型机理及其技术发展动向［J］.轻工机械,2003(4):24-28.
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