文献类型：期刊文献

英文题名：In Situ Compatibilization of Isotactic Polypropylene and High-Density Polyethylene by a Melt Cobranching Reaction

作者：Wang, Jun Yang, Le Li, Xiaolong Luo, Zhu Li, Jianjun Xia, Xiaosong Linghu, Changkai

第一作者：Wang, Jun

通信作者：Luo, Z[1];Li, JJ[2]

机构：[1]Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China;[2]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China;[3]Kingfa Sci & Technol Co Ltd, Guangzhou 510665, Peoples R China

第一机构：Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China;corresponding author), Kingfa Sci & Technol Co Ltd, Guangzhou 510665, Peoples R China.

年份：2022

卷号：30

期号：3

起止页码：1127-1140

外文期刊名：JOURNAL OF POLYMERS AND THE ENVIRONMENT

收录：;EI(收录号：20213410803039);Scopus(收录号：2-s2.0-85113137189);WOS:【SCI-EXPANDED(收录号:WOS:000687009900001)】；

基金：This study was funded by the National Key R & D Plan of China (2019YFC1908200).

语种：英文

外文关键词：iPP; HDPE; Long-chain branching copolymer; In situ compatibilization

摘要：Incompatible polypropylene (PP) and polyethylene (PE) are difficult to separate in mixed recycling streams such as waste plastic packaging, which makes polyolefin mixtures unsuitable for high-quality products. In this work, based on the free radical branching reaction, a co-branching reaction of isotactic polypropylene (iPP) and high-density polyethylene (HDPE) blends was carried out in the presence of the peroxide, free radical regulator and multifunctional acrylate monomer, and a star-like long-chain branching (LCB) copolymer was obtained. The effect of in situ compatibilization on the structures and mechanical properties of iPP/HDPE was investigated, and the compatibilization mechanism was discussed. Results showed that the mechanical properties of the modified blends were largely improved, and efficient in-situ compatibilization of iPP and HDPE could be taken place in a wide process window. Moreover, the sizes of the dispersed phase in the modified blends were clearly decreased, and the interfacial thickness increased. Compared with the pure iPP/HDPE blend, the initial crystallization temperature of iPP in the modified iPP/HDPE blend was increased, and long branched chains of the LCB copolymers were physically entangled with the chemical identical homopolymers or even participated in the crystallization of iPP and HDPE. Thanks to the in situ compatibilization strategy, the compatibility of iPP/HDPE was significantly improved.