Abstract
AbstractThe solid‐state foaming process produces microcellular foams with an outer layer of solid skin that encapsulates the cellular core. In this article, we implement a 1D model to predict the thickness of the solid skin based on the effective Tg of the polymer‐gas system for a given foaming temperature. The model is based on the understanding that bubbles nucleate when the foaming temperature exceeds the effective Tg during the foaming process. The model was validated with experimental results on the PC‐CO2 system, which showed that skin thickness decreases with increased foaming temperature. We also developed a linear correlation to accurately predict effective Tg at different CO2 concentrations. The article also explores the model sensitivity to the key input parameters related to gas diffusion.Highlights Linear correlation to accurately predict effective Tg profiles in PC‐CO2 system. Increasing foaming temperature decreases skin thickness. Model is sensitive to the input parameters related to gas diffusion.
Published Version
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