DIELECTRIC-RELAXATION STUDIES ON PHENYL AND CHLOROPHENYL ESTERS OF POLY(ACRYLIC ACID)

被引:20
作者
DIAZCALLEJA, R
RIANDE, E
SANROMAN, J
机构
[1] UNIV POLITECN VALENCIA,ETSII,TERMODINAM LAB,E-46071 VALENCIA,SPAIN
[2] CSIC,INST CIENCIA & TECNOL POLIMEROS,E-28006 MADRID,SPAIN
关键词
D O I
10.1021/ma00001a040
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Dielectric measurements have been made on phenyl and chlorophenyl esters of poly(acrylic acid). Phenomenological analysis of the data indicates that the strength of the beta-subglass process for both poly(phenyl acrylate) (PPA) and poly(p-chlorophenyl acrylate) (PPCPA) is weak in comparison with the strength of this process for poly(o-chlorophenyl acrylate) (POCPA) and poly(m-chlorophenyl acrylate) (PMCPA). The latter two polymers exhibit a relatively strong-beta-process compared with the alpha-glass-rubber relaxation. Information on the intramolecular and intermolecular correlation factors was obtained from the values of the mean-square dipole moments determined from dielectric measurements in solution and in the bulk. The alpha-relaxation is governed by the free volume, and the coupling model gives a good account of this process. Attempts are made to explain the molecular origin of the subglass relaxations.
引用
收藏
页码:264 / 269
页数:6
相关论文
共 24 条
[1]   RELAXATION PROCESSES IN CRYSTALLINE POLYMERS - EXPERIMENTAL BEHAVIOR - A REVIEW [J].
BOYD, RH .
POLYMER, 1985, 26 (03) :323-347
[2]   RELAXATION PROCESSES IN CRYSTALLINE POLYMERS - MOLECULAR INTERPRETATION - A REVIEW [J].
BOYD, RH .
POLYMER, 1985, 26 (08) :1123-1133
[3]   SUBGLASS RELAXATION PROCESSES - DIELECTRIC-RELAXATION IN METHYL ACRYLATE ETHYLENE COPOLYMERS [J].
BUERGER, DE ;
BOYD, RH .
MACROMOLECULES, 1989, 22 (06) :2694-2699
[4]   SUBGLASS RELAXATION PROCESSES - DIELECTRIC-RELAXATION IN VINYL-ACETATE ETHYLENE COPOLYMERS [J].
BUERGER, DE ;
BOYD, RH .
MACROMOLECULES, 1989, 22 (06) :2699-2705
[5]   Dispersion and absorption in dielectrics I. Alternating current characteristics [J].
Cole, KS ;
Cole, RH .
JOURNAL OF CHEMICAL PHYSICS, 1941, 9 (04) :341-351
[6]   STUDIES IN NEWTONIAN FLOW .5. FURTHER VERIFICATION OF THE FREE-SPACE VISCOSITY EQUATION [J].
DOOLITTLE, AK ;
DOOLITTLE, DB .
JOURNAL OF APPLIED PHYSICS, 1957, 28 (08) :901-905
[7]  
Ferry JD., 1980, VISCOELASTIC PROPERT
[8]  
Frohlich H., 1959, THEORY DIELECTRICS
[9]   A COMPLEX PLANE REPRESENTATION OF DIELECTRIC AND MECHANICAL RELAXATION PROCESSES IN SOME POLYMERS [J].
HAVRILIA.S ;
NEGAMI, S .
POLYMER, 1967, 8 (04) :161-&
[10]  
KOHLRAUSCH R, 1847, ANN PHYS, V12, P3931