文献类型：期刊文献

中文题名：超声场对高密聚乙烯/硫酸钙复合材料混炼过程和性能的影响

英文题名：Reinforcement of Ultrasonic Field on Mixing Process of HDPE/CaSO4Composite Material

作者：洪敏[1];谢林生[1];马玉录[1];李果[1];罗日萍[1];陈欣[1];叶云和[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2014

卷号：30

期号：1

起止页码：91

中文期刊名：高分子材料科学与工程

外文期刊名：Polymer Materials Science & Engineering

收录：CSTPCD;;EI(收录号：20141217496754);Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金资助项目(51273065)

语种：中文

中文关键词：混炼;超声场;复合材料;高密度聚乙烯

外文关键词：mixing process; ultrasonic field; composites; HDPE

摘要：首次在双转子连续混炼过程中引入超声场作用,利用自行设计的超声混炼加工一体化设备制备了高密度聚乙烯/硫酸钙(HDPE/CaSO4)复合材料。通过差示扫描量热(DSC)分析、旋转流变仪、扫描电子显微镜(SEM)、万能拉伸试验仪,研究了超声功率对于复合材料晶体结构、流变性能、分散相的分散程度以及力学性能的影响。研究发现,在超声功率为0W^180W的范围内,结晶度随超声功率的增加而增大,当超声功率为270W时,结晶度有降低;超声作用有效地改善了CaSO4颗粒的团聚现象,使其在HDPE基体中分布更加均匀,提高了HDPE/CaSO4复合材料的力学性能,当超声功率为180W时,其综合力学性能最优,拉伸强度、断裂强度及断裂伸长率分别提高了10.5%、21.7%、8.4%;超声作用有效地降低了HDPE/CaSO4复合材料的黏度,当超声功率为90W时,其黏度下降程度最大,超声场有效的改善了其加工性能。
The ultrasonic field effect was introduced into twin-rotor continuous mixing process for the first time, HDPE/CaSO4 composites was prepared by self-designed ultrasonic mixing device. The effect of ultrasonic field on crystal structure, rheological properties, dispersion degree and mechanical property of HDPE/CaSO4 composites were studied through DSC, rotary rheometer, SEM and universal tensile tester. The results show that when the ultrasonic power is during 0W- 180W, the crystallinity of HDPE/CaSO4 composites increases along with the increase of ultrasonic power. When the ultrasonic power is 270W, the crystallinity decreases slightly. The ultrasonic field prevents the agglomeration of CaSO4 particles and makes them distribute more uniformly in HDPE matrix, which improves the mechanical properties of HDPE/CaSO4 composites. When the ultrasonic power is 180W, the comprehensive mechanical properties turn out to be optimal, tensile strength, breaking strength and elongation at break of HDPE/CaSO4 composites increase by 10.5 %, 21.7 % and 8.4 % respectively. Ultrasonic field reduces the viscosity of HDPE/CaSO4 composites effectively, improves its processing performance. When the ultrasonic power is 90W, the viscosity drops by the largest degree.