DYNAMIC-MECHANICAL AND LIGHT-SCATTERING STUDY OF THE GLASS-TRANSITION OF POLY(VINYLACETATE) AND A POLY(VINYLACETATE) PLUS POLY(4-HYDROXYSTYRENE) BLEND

被引：13

作者：

LUENGO, G

ORTEGA, F

RUBIO, RG

REY, A

PROLONGO, MG

MASEGOSA, RM

机构：

[1] UNIV COMPLUTENSE,FAC CIENCIAS QUIM,DEPT QUIM FIS,E-28040 MADRID,SPAIN

[2] UNIV POLITECN MADRID,ETSI AERONAUT,DEPT MAT & PROD AEROESPACIAL,E-28040 MADRID,SPAIN

[3] UNIV POLITECN MADRID,EUIT AERONAUT,DEPT TECNOL ESPECIALES APLICADAS AERONAUT,E-28040 MADRID,SPAIN

来源：

JOURNAL OF CHEMICAL PHYSICS | 1994年 / 100卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1063/1.466416

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 dynamics of poly(vinylacetate) (PVAc) and of a blend of PVAc and 20% in weight of poly(4-hydoxystyrene) have been studied in the glass transition region using dynamic-mechanical and photon-correlation spectroscopies. Both kinds of data show the overlapping of the main alpha relaxation with a faster one. The complex part of the elastic modulus shows the existence of a beta' sub-T-g transition overlapping with the alpha and beta transitions. As a consequence, at least two Kohlraush-Williams-Watts terms are needed to describe the relaxation functions. The results show a good agreement with the predictions of the mode coupling theory except for the fact that the calculated critical temperature seems to be lower than the calorimetric glass transition temperature.

引用

页码：3258 / 3267

页数：10

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[1] DYNAMIC MECHANICAL STUDY OF 4 AMORPHOUS POLYMERS AROUND AND ABOVE THE GLASS-TRANSITION - BREAKDOWN OF THE TIME TEMPERATURE SUPERPOSITION PRINCIPLE IN THE FRAME OF THE COUPLING MODEL [J].