Rheological Investigations of Copolymers of N-(Substituted Maleimide)s with Styrene in Dimethylsulfoxide

作者：Morariu Simona^*; Bercea Maria; Hulubei Camelia

来源：Journal of Macromolecular Science Part B-Physics, 2008, 47(6): 1108-1116.

DOI：10.1080/00222340802403172

• substituted maleimide
• copolymers
• viscoelastic properties

The viscoelastic behavior of poly(N-(4-formylphenoxy-4'-carbonylphenyl)maleimide-co-styrene) and poly(N-(4-carboxyphenyl)maleimide-co-styrene) in dimethylsulfoxide is investigated. The rheological parameters (elastic modulus, viscous modulus, loss tangent) were determined at different temperatures in the range 20 degrees C-80 degrees C. Poly(N-(4-carboxyphenyl)maleimide-co-styrene) exhibits a Newtonian behavior in the frequency range from 0.05 to 700 rad/s at all temperatures. For poly(N-(4-formylphenoxy-4'-carbonylphenyl)maleimide-co-styrene), a shear thinning behavior was observed at temperatures below 40 degrees C (pseudoplastic behavior), whereas at higher temperatures the sample exhibits Newtonian flow throughout the studied frequencies range. The activation energies of the flow (calculated by using the zero shear viscosity values) give indications about the intensity of polymer-polymer interactions as a function of the maleimide monomer structure.

• 出版日期2008