Study of the dielectric relaxation of poly(phenylpropyl acrylate) and poly(phenylpropyl methacrylate): effect of slight differences in chemical structure

Abstract

WileyOrtiz Serna, MP.; Sanchis Sánchez, MJ.; Redondo Foj, MB.; Carsí Rosique, M.; Díaz Calleja, R.; Leiva, A.; Gargallo, L.... (2015). Study of the dielectric relaxation of poly(phenylpropyl acrylate) and poly(phenylpropyl methacrylate): effect of slight differences in chemical structure. Polymer International. 64 (12) one glass-rubber transition (T g ) for the P3Ph1PA and two for the P3Ph1PM samples, which evidences the great effect of the methyl groups on the segmental motions of the polymer. Phenomenological analysis of the data has been carried out in order to establish the strength, width, and fragility parameters of the glass-rubber transitions. In the case of the P3Ph1PA, the strength was found to be larger than for the P3Ph1PM, pointing out that the methyl group disturbs the mobility. Conductive processes dominate the dielectric spectra at high temperatures and low frequencies.

Synthesis of poly(3-hexylthiophene)-block-poly(phenylisocyanide) copolymers and their self-assembly in solution

“…It should be noted that the P3HT blocks have good solubility in THF, while the solubility of the chiral PPI blocks containing aromatic side groups in THF decreases with an increase in the chain length. It is noted that the somewhat longer phenylpropyl side chains of relevant polymers might have an important influence, as reported previously, 45–47 because aromatic substituents might be effective to arrange regularly in their densely packed pendant array, and the yielded polymers or copolymers were partially soluble in THF. 48,49 Fig.…”

“…It is noted that the somewhat longer phenylpropyl side chains of relevant polymers might have an important influence, as reported previously, [45][46][47] because aromatic substituents might be effective to arrange regularly in their densely packed pendant array, and the yielded polymers or copolymers were partially soluble in THF. 48,49 Fig.…”