DIELECTRIC-RELAXATION OF POLY(ESTER-ETHER-CARBONATE) MULTIBLOCK TERPOLYMERS

被引：12

作者：

ROSLANIEC, Z ^{[1
]}

EZQUERRA, TA ^{[1
]}

BALTACALLEJA, FJ ^{[1
]}

机构：

[1] CSIC,INST ESTRUCTURA MAT,E-28006 MADRID,SPAIN

来源：

COLLOID AND POLYMER SCIENCE | 1995年 / 273卷 / 01期

关键词：

DIELECTRIC RELAXATION; BLOCK COPOLYMERS; THERMOPLASTIC ELASTOMERS;

D O I：

10.1007/BF00655675

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The dielectric properties of a series of po ly(es ter-ether-carbonate) multiblock terpolymers have been investigated as a function of ether and carbonate composition in the frequency range of 10(3)-10(6) Hz. The degree of polymerization of the samples was determined by viscosimetry measurements. The weight fraction, degree of crystallinity, and melting temperatures were characterized by means of x-ray diffraction and DSC methods. Dielectric behavior has been discussed in terms of Havriliak-Negami formulation. The variation of the dielectric properties with temperature has been associated with two relaxation processes: a) the gamma-relaxation process observed at low temperature, which is associated to local motion of polar groups attached to both the soft and the hard segments, and b) the beta process assigned to long-range molecular motions above the glass transition temperature.

引用

页码：58 / 65

页数：8

共 25 条

[1] MECHANICAL RELAXATION PROCESSES IN POLYETHER BLOCK AMIDE COPOLYMERS (PEBA) [J].