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Designing Issues in Polymer Foaming with Supercritical Fluids
Author(s) -
Tsivintzelis Ioannis,
Panayiotou Costas
Publication year - 2013
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201300064
Subject(s) - materials science , supercritical fluid , foaming agent , polymer , porosity , softening , methyl methacrylate , blowing agent , composite material , glass transition , softening point , phase (matter) , chemical engineering , chemistry , polymerization , organic chemistry , polyurethane , engineering
Summary Various foaming routes were used in order to produce poly(methyl methacrylate) porous structures. The focus was, primarily, on the temperature‐induced phase separation method and the effect of foaming temperature was, first, investigated. It was observed that the pore size decreases with increase of foaming temperature up to the glass transition region, where the softening of the polymer matrix results in the increase of the average pore diameter with further increase of the foaming temperature. Subsequently, different porous structures were obtained using identical initial and final conditions, but varying the foaming route. The role of the intermediate foaming steps (which define the foaming route) on the final porous structure is discussed.