文献类型：期刊文献

英文题名：Improved cell nucleating effect of partially melted crystal structure to enhance the microcellular foaming and impact properties of isotactic polypropylene

作者：Fu, Long[1];Shi, Qiankun[1];Ji, Youxin[1];Wang, Guanglong[2];Zhang, Xiaoli[1];Chen, Jingbo[1];Shen, Changyu[1];Park, Chul B.[3]

第一作者：Fu, Long

通讯作者：Zhang, XL[1]

机构：[1]Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 45000, Peoples R China;[2]Xinxiang Univ, Coll Mech & Elect Engn, Xinxiang 453003, Henan, Peoples R China;[3]Univ Toronto, Dept Mech & Ind Engn, Microcellular Plast Mfg Lab, Toronto, ON M5S 3G8, Canada

第一机构：Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 45000, Peoples R China

通讯机构：[1]corresponding author), Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 45000, Peoples R China.

年份：2020

卷号：160

外文期刊名：JOURNAL OF SUPERCRITICAL FLUIDS

收录：;EI(收录号：20200808202740);Scopus(收录号：2-s2.0-85079680988);WOS:【SCI-EXPANDED(收录号:WOS:000528903900011)】；

基金：This work was financially supported by the National Natural Science Foundation of China (11872338), and the Henan Province Natural Science Project of China (192102210024, 19B430011, 20A430028).

语种：英文

外文关键词：Isotactic polypropylene; Partially melted crystal structure; Microcellular foam; Cell nucleating; Impact strength

摘要：The effects of a partially melted crystal structure (PMCS) on enhancing the cell nucleating behavior, as well as on the related foaming behavior of isotactic polypropylene (iPP), were investigated. The incorporation of PMCS and the corresponding effects were characterized by rheological, thermal and X-ray testing methods. The microcellular foaming results revealed that the addition of PMCS could dramatically increase the melt strength and the cell nucleating sites of the matrix. The synergistic effects of the PMCS and high melt strength polypropylene (HMSPP) could decrease the average cell size to approximately 2 mu m and increase the cell density to 1.49x10(11) cells/cm(3). Additionally, the gradual melting of the PMCS could also prove its enhancing effect on the melt strength and cell nucleating ability. The uniform microcellular cells obtained could positively affect the notched impact strength of the foamed iPP-HMSPP blends. (C) 2020 Elsevier B.V. All rights reserved.