文献类型：期刊文献

英文题名：Synergistic toughening of polypropylene with ultra-high molecular weight polyethylene and elastomer-olefin block copolymers

作者：Qi, Lucheng[1];Wu, Lei[1];He, Ren[3];Cheng, Hui[1];Liu, Boping[2];He, Xuelian[1]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[2]South China Agr Univ, Coll Mat & Energy, Guangzhou 510642, Guangdong, Peoples R China;[3]Daqing Petrochem Res Ctr PetroChina, Daqing 163714, Peoples R China

年份：2019

卷号：9

期号：41

起止页码：23994

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20193307299846);WOS:【SCI-EXPANDED(收录号:WOS:000478947000062)】；

基金：This work is financially supported by the National Natural Science Foundation of China (No. 51573048) and Natural Science Foundation of Shanghai (No. 16R1407300).

语种：英文

外文关键词：Nonmetallic matrix composites - Crystallinity - Plastic products - Impact strength - Nucleation - Olefins - Elastomers - Polypropylenes - Molecular weight - Block copolymers

摘要：Blends of polypropylene (PP) and ultra-high molecular weight polyethylene (UHMWPE) with elastomer-olefin block copolymers (OBC) were prepared using an ultrasonic twin-screw extruder, and the mechanical, thermal, and rheological properties of the blends were investigated. The interfacial interactions among PP, OBC, and UHMWPE showed that the PP/OBC/UHMWPE blends formed a core-shell structure with UHMWPE as the core and OBC as the shell. The crystallization temperature and the crystallinity of the blends were improved for the heterogeneous nucleation between PP- and OBC-covered UHMWPE particles. Moreover, the mechanical and thermal properties of PP/UHMWPE blends have also been greatly improved by adding OBC. Furthermore, it was evident that the OBC-covered HHMWPE particles became smaller under the application of ultrasonic irradiation, so the interfacial interactions between the particles and the PP matrix were enhanced and the impact strength of the blends was improved.