Premium
Dielectric and viscoelastic relaxations in poly(dicyclohexyl itaconate)
Author(s) -
DíazCalleja Ricardo,
Gargallo Ligia,
Radic Deodato
Publication year - 1992
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990290302
Subject(s) - relaxation (psychology) , polarizability , viscoelasticity , dielectric , activation energy , materials science , permittivity , cole–cole equation , chemical physics , thermodynamics , range (aeronautics) , absorption (acoustics) , polymer chemistry , chemistry , composite material , molecule , physics , organic chemistry , optoelectronics , psychology , social psychology
The relaxation spectrum of poly(dicyclohexyl itaconate) (PDCHI) was studied by dynamic mechanical, DC dielectric and thermally stimulated current measurements. Four relaxations, α, β, γ and δ, were obtained. The only method by which all four peaks were observed is that of dynamic dielectric measurements because of the broad range of frequencies employed. The β, γ and δ relaxations were characterized by the activation energy in a relaxation map. A tentative explanation of the molecular origin of each absorption is proposed. In the case of the α relaxation we have used two transformations, one from the permittivity to polarizability and the second from compliance to deformability in order to make evident the existence of this relaxation.