Synthesis of polyimides in supercritical carbon dioxide

One-step polycyclization reaction in supercritical carbon dioxide has been carried out for the first time and a thereby set of polyimides has been synthesized. Diphenyl-2,2-hexafluoropropane-3,3′,4,4′-tetracarboxylic acid dianhydride (dianhydride 6F), 4,4′-diaminodiphenyl-2,2-hexafluoropropane (diam...

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Published inThe Journal of supercritical fluids Vol. 27; no. 1; pp. 121 - 130
Main Authors Said-Galiyev, Ernest E., Vygodskii, Yakov S., Nikitin, Lev N., Vinokur, Rostislav A., Gallyamov, Marat O., Pototskaya, Inna V., Kireev, Vyacheslav V., Khokhlov, Alexei R., Schaumburg, Kjeld
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.09.2003
Subjects
Polycyclization reaction
Polyimides
Supercritical carbon dioxide
Synthesis
Polycyclization reaction
Supercritical carbon dioxide
Synthesis
Polyimides
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Summary:One-step polycyclization reaction in supercritical carbon dioxide has been carried out for the first time and a thereby set of polyimides has been synthesized. Diphenyl-2,2-hexafluoropropane-3,3′,4,4′-tetracarboxylic acid dianhydride (dianhydride 6F), 4,4′-diaminodiphenyl-2,2-hexafluoropropane (diamine 6F) and 9,9-bis(4-aminophenyl)fluorene were used as monomers. Maximum inherent viscosity of the synthesized polymers is 0.56 dl/g. It is supposed that carbon dioxide act as an acidic catalyst for the reaction in the presence of water admixture.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0896-8446
1872-8162
DOI:10.1016/S0896-8446(03)00146-3