Study of the Behavior of Some Polyheteroarylenes Treated with Supercritical Carbon Dioxide

• Published in: High performance polymers Vol. 21; no. 5; pp. 562 - 578
• Main Authors: Ronova, Inga A., Nikitin, Lev N., Sokolova, Ekaterina A., Sava, Ion, Bruma, Maria
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01-10-2009
• Subjects: polyheteroarylenes; free volume; Supercritical carbon dioxide; glass transition temperature; hydrogen bonds; conformational rigidity
• ISSN: 0954-0083; 1361-6412
• DOI: 10.1177/0954008309339331

Various polyheteroarylenes have been studied with regard to their physical properties before and after treatment with supercritical carbon dioxide (sc-CO 2). Thus, the study of dependence of glass transition temperature and free volume of polymer matrix on the conformational rigidity showed that the process of swelling in sc-CO2 is influenced by the residual solvent and by the formation of possible hydrogen bonds between CO2 and amide groups in the polymer chain.