Dynamics of Poly(ethylene oxide) around Its Melting Temperature
Artikel i vetenskaplig tidskrift, 2013
This study has focused on the ionic conductivity (of impurities) and the changes in relaxation behavior of semicrystalline poly(ethylene oxide) (PEO) around its melting temperature of the crystalline regions. Our main aim was to understand the implications of nucleation and growth of spherulitic structures on the general dynamical properties of the polymer chains and how these dynamical alterations affect the ionic conductivity. Impedance data have been scaled and analyzed under conductivity and modulus formalisms over wide ranges of frequency and temperature. The analysis of the scaled formalisms indicates that both the conductivity and the structural relaxation mechanisms are temperature independent above the melting point of PEO. However, below the melting, point, the slow crystallization of PEO leads to growth of spherulites and also to the formation of "interphase" regions. These morphological changes result in a hindered long-range dc conductivity, which, in turn, leads to a decoupling of the dc conductivity and the structural relaxation below the melting point of PEO.
1971
SPECTROSCOPY
1962
1994
1990
PLI R
P395
MACROMOLECULES
AC CONDUCTIVITY
IONICALLY CONDUCTING GLASSES
DISORDERED-SYSTEMS
1983
POLYMER
P1491
KAHASH.Y
V9
DIELECTRIC-RELAXATION
V55
ELECTROLYTES
P672
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
RTER CH
1973
POLYMER BULLETIN
V31
ENG SZD
IMPEDANCE
SOLID ELECTROLYTES
POLYETHYLENE OXIDE
P845
CRYSTAL AMORPHOUS INTERPHASE
P260
V4
POLYMER
MACROMOLECULES
V6
P589
RHARDT R
V57
JOURNAL OF POLYMER SCIENCE
ICE FP
Författare
Benson Koch Money
Chalmers, Teknisk fysik, Kondenserade materiens fysik
Jan Swenson
Chalmers, Teknisk fysik, Kondenserade materiens fysik
Macromolecules
00249297 (ISSN) 15205835 (eISSN)
Vol. 46 17 6949-6954Ämneskategorier
Polymerkemi
DOI
10.1021/ma4003598