文献类型：期刊文献

英文题名：Study on synergistic toughening of polypropylene with high-density polyethylene and elastomer-olefin block copolymers under ultrasonic application

作者：He, Xuelian[1];Shi, Jiaji[1];Wu, Lei[1];Jiang, Pingkai[2];Liu, Boping[3]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Dept Polymer Sci & Engn, Shanghai Key Lab Elect Insulat & Thermal Aging, Shanghai 200240, Peoples R China;[3]South China Agr Univ, Coll Mat & Energy, Guangzhou 510642, Guangdong, Peoples R China

年份：2018

卷号：161

起止页码：115

外文期刊名：COMPOSITES SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20181705038428);WOS:【SCI-EXPANDED(收录号:WOS:000433642800015)】；

基金：The financial support by the National Natural Science Foundation of China (Grant number: 51573048), and the special funding from the National Priority Basic Research of China (Grant number: 2014CB239503) and the National Basic Research Program of China (973 Program, 2014CB239503) are all highly acknowledged.

语种：英文

外文关键词：Polypropylene; High density polyethylene; Elastomer-olefin block copolymers; Interfacial interaction; Ultrasonic

摘要：In this study, we prepared the blends of polypropylene (PP) and high-density polyethylene (HDPE) with elastomer-olefin block copolymers (OBC) using an ultrasonic twin-screw extruder and investigated the mechanical, thermodynamic, and rheological properties of the blends. We examined the interfacial interactions among PP, OBC, and HDPE and observed that the PP/OBC/HDPE blends formed a core-shell structure with HDPE as the core and OBC as the shell. The crystallization temperature as well as the crystallinity of the blends were improved thanks to the heterogeneous nucleation between PP- and OBC-covered HDPE particles. Moreover, the impact strength of PP/OBC/HDPE blends was increased by three times as compared with PP because of the addition of 10 phr OBC and 15 phr HDPE; however, the viscosity increased slightly. Furthermore, it was evident from the fracture surface morphologies of PP/OBC/HDPE blends that the OBC-covered HDPE particles became smaller under the application of ultrasonic irradiation; hence, the interfacial interactions between the particles and the PP matrix were enhanced and the impact strength of the blends was improved.