Dynamic mechanical and dielectric relaxations in poly(monoethylphenyl itaconate)

Relaxational Study of Poly(2-chlorocyclohexyl methacrylate) by Thermally Stimulated Current, Dielectric, and Dynamic Mechanical Spectroscopy

“…Usually the additivity of each one of the contributions to the relaxations is assumed . According to this procedure, the following equation to represent the empirical data is proposed: …”

Characterization of low temperature dielectric processes in Poly(dicyclohexyl-itaconate)

“…In fact, itaconic acid can be selectively esterified, to obtain mono-and di-itaconates and eventually the corresponding polymers. The structural versatility of these polymers gives rise to a complex relaxational behavior, due to the large number of degrees of freedom of its chain [1][2][3][4][5][6][7][8][9]. However, in the case of poly(di-itaconates), steric hindrance to the rotations of the lateral chains as a whole should appear because of the presence of two side groups per repeating unit.…”

Dielectric Relaxations in Poly(di-n-alkyl itaconate)s

“…In this present paper, we continue our investigations into the di- n -alkyl system and examine the dynamic behavior using dielectric spectroscopy. Diaz-Calleja et al have previously reported the dielectric responses of several monoester, dicycloalkyl/diaryl, and lower dialkyl polymers, − but these workers concentrated their analysis on isochronal sub- T g events associated with the side groups. In contrast to QENS, which returns information from all parts of a relaxing molecule, dielectric spectroscopy is of course primarily sensitive to modes involving dipolar units, and it is hoped by systematically examining the series poly(dimethyl itaconate) to poly(di- n -octyl itaconate) that this rather specific probe will provide further information on these intriguing polymers.…”