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

0024-9297 (ISSN) 1520-5835 (eISSN)

Vol. 46 17 6949-6954

Ämneskategorier

Polymerkemi

DOI

10.1021/ma4003598