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The
Modification and Processing of Polymers with Supercritical Carbon Dioxide
Shigeo NISHIKAWA
Material Process Group, Electric & Engineered Materials Laboratory,Mitsui
Chemicals, Inc
Nippon Gomu Kyokaishi,(2004),77(10),343-347 General Review in Japanese
Abstract
Supercritical carbon dioxide is an environmentally
friendly material and has great potential for the modification and
processing of polymers. Addition of supercritical carbon dioxide to
various polymers may lower the glass transition temperature, melt
viscosity, and interfacial tensions. The aim of this study is to contribute
to the development of the new processes and new products of high value
and conserving the global environment. We have studied processes of
foaming, reactive processing, and impregnation using supercritical
carbon dioxide. The results from our work indicate that the solubility
and diffusivity of carbon dioxide in polymers are key parameters for
control of these processes.
Keywords:
Supercritical carbon dioxide, Foaming, Reactive processing, Impregnation,
Solubility, Diffusion
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