Visual observation and Numerical Studies of bubble formation of polypropylene chemical foaming system in the different injection foaming environment

In this paper, polypropylene (PP) and chemical foaming agent (AC) were taken as the research objects, and the influence of different injection molding foaming environment on the bubble formation process was studied by using the visualization device. And the mathematical model formula was used to fit...

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Bibliographic Details
Published in:Journal of polymer research 2022-09, Vol.29 (9), Article 363
Main Authors: Deng, Rong, Jiang, Tuanhui, Liu, Bujin, Yang, Jingkui, Zeng, Xiangbu, Li, Shengnan, Gong, Wei, Zhang, Chun, He, Li
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Correlation coefficients
Curve fitting
Foaming agents
Industrial Chemistry/Chemical Engineering
Injection molding
Mathematical analysis
Mathematical models
Nucleation
Original Paper
Polymer Sciences
Polypropylene
Visual observation
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Summary:In this paper, polypropylene (PP) and chemical foaming agent (AC) were taken as the research objects, and the influence of different injection molding foaming environment on the bubble formation process was studied by using the visualization device. And the mathematical model formula was used to fit the curve of bubble number ( N ) with time ( t ) in the foaming process. Among them, the change of injection temperature and foaming agent content only changed the bubble formation rate and the final bubble number. With the increase of injection temperature, the foaming agent decomposed in advance in the barrel. The change of injection pressure had the most obvious effect on the nucleation process. Through the nonlinear fitting of N-t curves under different foaming environments, the correlation coefficient R 2 was always greater than 0.98, indicating that the process of foaming nucleation could be described intuitively through the mathematical model.
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-022-03183-3