Glass Transition Temperature in Microcellular Foaming Process with Supercritical Carbon Dioxide: A Review

In microcellular foaming process, the glass transition temperature (T_g) of polymer determines foaming temperature and has an effect on the other physical properties of polymer. In thisstudy, an evaluation of the current state of understanding for T_g was reviewed. Inaddition, we focused on the establishment and advancement of three main widely-used models that predict T_g (i.e. Chow model, Cha-Yoon model and Condo - Sanchez model). The comparisons of the three T_g-prediction models, with attention being given to their ownadvantages, disadvantages and scopes of application provide a reference for the further study.