Microstructure and Rheologic Development of Polypropylene/Nano-CaCO3 Composites along Twin-Screw Extruder
Microstructure and Rheologic Development of Polypropylene/Nano-CaCO3 Composites along Twin-Screw Extruder
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双螺杆挤出机聚丙烯/纳米碳酸钙复合材料的微观结构和流变学研究
DOI：
10.1002/app.30186
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发表时间：
2009-11
影响因子：
3
通讯作者：
Huang, Han-Xiong
中科院分区：
文献类型：
--
作者：
Jiang, Guo;Huang, Han-Xiong
采用啮合式同向双螺杆挤出机制备了PP/纳米CaCO3复合材料。采用了两种不同的螺丝构型，分别用螺丝A和螺丝B表示。前者提供高分散性混合，后者提供高分散性和分散性混合。通过在螺杆A和螺杆B的4个位置取样，研究了混合方式对纳米复合材料微观结构和流变发展的影响。结果表明，在挤出机出口的样品中，螺杆A和螺杆B的当量直径小于100 nm的纳米CaCO3粒子所占比例分别为66.5%和79.0%。分别进行了分析。此外，螺杆B在四个取样点的数均直径均小于螺杆A，这意味着螺杆B提供的分散混合有利于纳米CaCO3在PP中的尺寸减小。此外，流变学结果表明，纳米复合材料的复粘度的降低与涡轮混合元件密切相关，涡轮混合元件提供了分布式混合。螺杆B制备的纳米复合材料在挤出机出口的在线熔体剪切粘度低于纯PP。这与纳米CaCO3在PP中的分散性有关。最后，分析了流变性能与微观结构的关系。©2009 Wiley期刊，Inc.《应用理工学院》，2009
Polypropylene/nano-calcium carbonate (PP/nano-CaCO3) composites were prepared by using an intermeshing, co-rotating twin-screw extruder. Two different screw configurations, denoted by screws A and B, respectively, were employed. The former provided high dispersive mixing and the later provided high dispersive and distributive mixing. Effect of mixing type on microstructure and rheologic development of nanocomposites was investigated by taking samples from four locations along screws A and B. Transmission electron microscopy results show that in the sample at the exit of extruder, the percentage of nano-CaCO3 particles with the equivalent diameter lower than 100 nm along screws A and B is 66.5 and 79.0%. respectively. Moreover, for screw B, the number-averaged diameter at four sampling locations is smaller than that for screw A. This means that the distributive mixing, provided by screw B, favors the size decrease of nano-CaCO3 in the PP matrix. In addition, rheologic results show that the decrease of complex viscosity for the nanocomposites is deeply related to turbine mixing elements, which provides distributive mixing. The online melt shear viscosity of the nanocomposite at the exit of extruder prepared by screw B is lower than that of pure PP. This is related to the dispersion of nano-CaCO3 in PP matrix. Finally, the relationship between rheologic properties and microstructure was analyzed. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009
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DOI：
10.1023/a:1016579724682
发表时间：
2002-08
期刊：
Journal of Materials Science Letters
影响因子：
--
作者：
Hai-xia Zhang;Jianfeng Chen;Hua Zhou;Guoquan Wang;J. Yun
通讯作者：
Hai-xia Zhang;Jianfeng Chen;Hua Zhou;Guoquan Wang;J. Yun
不同混合方式制备的PP/纳米CaCO3复合材料的在线剪切粘度和微观结构
影响因子：
4.5
作者：
Huang, Han-Xiong;Jiang, Guo
通讯作者：
Jiang, Guo
影响因子：
3.2
作者：
Hanxiong Huang;You-Fa Huang;Shurui Yang
通讯作者：
Hanxiong Huang;You-Fa Huang;Shurui Yang
影响因子：
4.6
作者：
W.C.J. Zuiderduin;C. Westzaan;H. Huetink;R. J. Gaymans
通讯作者：
W.C.J. Zuiderduin;C. Westzaan;H. Huetink;R. J. Gaymans
影响因子：
4.6
作者：
Jiang, L;Lam, YC;Ang, LS
通讯作者：
Ang, LS