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Numerical Simulation for Polymeric Foaming (2)|Homogeneous and Heterogeneous Nucleation|

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Inamori, Kohjiroh / Hayama, Kaoru / Ohshima, Masahiro / Tanigaki, Masataka

Numerical simulations were carried out on a polyethylene/N2 physical foaming process where homogeneous and heterogeneous nucleations occurred simultaneously, using Shafi's nucleation and bubble growth models to observe the effect of nucleating agent and processing conditions on the size and the number density of bubbles. The interaction between homogeneously-nucleated and heterogeneously-nucleated bubbles could be observed when the pressure was gradually released.

Key words: Physical foaming / Homogeneous nucleation / Heterogeneous nucleation / Polymeric foam

Seikei-Kakou, Vol.11, No.6, pp.471-476 (1999), Copyright (C) JSPP 1999-