文献类型：期刊文献

英文题名：The solid-state mixing characteristic of two rotor continuous mixer and its influence on microstructure of HDPE/CaCO3 composite

作者：Chen, Xin[1];Zhang, Hui[1];Chen, Tao[1];Zhao, Haili[1];Ji, Huajian[1];Ma, Yulu[1];Sha, Jin[1];Xie, Linsheng[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：40

期号：8

起止页码：3296

外文期刊名：POLYMER COMPOSITES

收录：;EI(收录号：20190506453943);WOS:【SCI-EXPANDED(收录号:WOS:000478616300033)】；

基金：Contract grant sponsor: The National Natural Science Foundation of China; contract grant number: No. 51273065.

语种：英文

外文关键词：Surface properties - Shear thinning - Calcite - Mixers (machinery) - Particle size - Thermogravimetric analysis - Fourier transform infrared spectroscopy - Plastic products - Contact angle - Fillers - Microstructure - Mixing - Morphology - High density polyethylenes - Particle size analysis

摘要：In this article, the solid-state mixing characteristics of two rotor continuous mixer were studied by revealing the change of CaCO3 particles size and its surface properties. High-density polyethylene/calcium carbonate (HDPE/CaCO3) composites were fabricated for the study. The characterized CaCO3 particles samples were taken from different axial positions of solid-state mixing zone. Particle size and morphology of CaCO3 particles were investigated by laser particle sizer and scanning electrical microscope (SEM). The decrease of CaCO3 particles size indicated that fillers deagglomerated along the solid-state mixing zone. The surface properties of CaCO3 particles were studied by Fourier transform infrared spectroscopy (FTIR), water contact angle and thermogravimetric analysis. The appearance of HDPE characteristic peaks in the FTIR spectrum of CaCO3 particles showed that the filler surface was coated by HDPE during solid-state mixing, which made CaCO3 particles less hydrophilic. Deagglomeration and surface coating amount of CaCO3 particles were influenced by process parameters, and the best results were obtained at feed rate 1.58 kg/h and rotor speed 700 rpm. Furthermore, SEM and dynamic rheology measurement of HDPE/CaCO3 composites were conducted to investigate the composite microstructure. Higher complex viscosity and more obvious shear thinning behavior were the indications of improved CaCO3-HDPE compatibility and filler-filler interaction after solid-state mixing process. POLYM. COMPOS., 40:3296-3305, 2019. (c) 2019 Society of Plastics Engineers