文献类型：期刊文献

英文题名：In-Situ Visualization of the Cell Formation Process of Foamed Polypropylene under Different Foaming Environments

作者：Deng, Rong Jiang, Tuanhui Zhang, Chun Zeng, Xiangbu Liu, Bujin Yang, Jingkui Li, Shengnan Gu, Jun Gong, Wei He, Li

第一作者：Deng, Rong

通信作者：Gong, W[1];He, L[1];He, L[2];Gong, W[3]

机构：[1]Guizhou Univ, Coll Mat Sci & Met Engn, Guiyang 550025, Peoples R China;[2]Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China;[3]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China;[4]Guizhou Normal Univ, Sch Mat & Architectural Engn, Guiyang 550025, Peoples R China

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

通信机构：corresponding author), Guizhou Univ, Coll Mat Sci & Met Engn, Guiyang 550025, Peoples R China;corresponding author), Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China;corresponding author), Guizhou Normal Univ, Sch Mat & Architectural Engn, Guiyang 550025, Peoples R China.

年份：2021

卷号：13

期号：9

外文期刊名：POLYMERS

收录：;EI(收录号：20212010347052);Scopus(收录号：2-s2.0-85105578913);WOS:【SCI-EXPANDED(收录号:WOS:000650717600001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 51863003, No. 52063008), Foundation of Guizhou Scientific Research Institute (No. [2018]4010), the Natural Science Foundation Funding Projects of Guizhou Province (No. [2019]1176, No. ZK [2021]050) and the Hundred Talents Project of Guizhou Province (No. [2016]5673).

语种：英文

外文关键词：polypropylene; foaming; dynamic foaming process; cell formation

摘要：In this paper, the dynamic foaming process of micro-foaming polypropylene (PP) in different foaming environments in real time was obtained via a visualization device. The relationship curve between cell number (n) and foaming time (t) was plotted, and then the nucleation kinetics of foam cells was analyzed. Results showed that the formation rate of cells changed obviously with the variation of melt temperature and the content of the foaming agent. The n-t curves presented a typical "S" shape, which indicated that the appearance of the cell number increased slowly in the initial foaming period, then increased rapidly in a short time, and finally maintained a certain value. When a certain pressure was applied to the PP melt, the external force had a great influence on the n-t curve. With the increasing external force, the rate of cell formation increased rapidly, and the shape of the n-t curve changed from "S" to "semi-S" without an obvious slow increase. The investigation of the n-t relationship in the PP dynamic foaming process under different foaming environments could provide effective bases for improving the foaming quality of injection molding foaming materials.