叶片挤出机制备LDPE/nano-CaCO_3复合材料的性能研究  

Study on Properties of LDPE/Nano-CaCO_3 Composites Prepared by Vane Extruder

作　　者：吴承然 瞿金平 陈荣源 贾仕奎 曹素娇 

机构地区：[1]华南理工大学聚合物成型加工工程教育部重点实验室聚合物新型成型装备国家工程研究中心,广东广州510640

出　　处：《塑料工业》2013年第1期87-90,共4页China Plastics Industry

摘　　要：利用自主研发的叶片挤出机制备低密度聚乙烯(LDPE)/纳米碳酸钙(nano-CaCO3)复合材料。探讨了叶片挤出机加工转速对复合材料的微观结构、热学性能以及力学性能的影响。结果表明,nano-CaCO3粒子在LDPE基体中的分散效果随叶片挤出机转速的增大先变好再变差,复合材料的结晶、熔融受转速的影响不大,复合材料的拉伸强度、拉伸模量和断裂伸长率则随转速的增大先增大后减小;在90 r/min时纳米粒子的分散效果最好,对应的力学性能最佳,尤其是拉伸模量增加近两倍。In this paper, nano-calcium carbonate （nano-CaCO3 ） reinibrced low density polyethylene （LDPE） composites were prepared by the novel self-made vane extruder. The effects of rotating speed on the micro structure, the thermal behaviors and the mechanical properties of LDPE/nano-CaCO 3 composites were investigated. The results showed that： the dispersion state of the nano-CaCO3 particles was improved firstly and then became poor as the vane speed increasing. The crystallization and melting of the LDPE/nano-CaCO 3 composites were affected little by vane speed. Tensile strength, tensile modulus and the b presented the same trend as the dispersion state of the nano-CaCO3 particles as the vane When the vane speed was 90 r/min, the particle dispersion and mechanical property especially the tensile modulus increased nearly two times. reaking elongation speed increasing. showed the best,

关 键 词：叶片挤出机 低密度聚乙烯 纳米碳酸钙 转速 

分 类 号：TQ320.6[化学工程—合成树脂塑料工业]