Relaxation spectra in poly(methylmethacrylate): Comparison of acoustic attenuation and light scattering data

被引：29

作者：

Caliskan, G ^{[1
]}

Kisliuk, A ^{[1
]}

Novikov, VN ^{[1
]}

Sokolov, AP ^{[1
]}

机构：

[1] Univ Akron, Dept Polymer Sci, Akron, OH 44325 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2001年 / 114卷 / 22期

关键词：

D O I：

10.1063/1.1370392

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：

Relaxation processes in polymethylmethacrylate were investigated using light scattering and mechanical relaxation techniques. The acoustic attenuation data cover the frequency range from 1 Hz to 17 GHz and the light scattering from 0.5 to 10 000 GHz. Analysis of the data in a broad temperature range (80-350 K) shows that the model of the asymmetric double-well potentials, traditionally used for description of the acoustic attenuation in glasses, cannot describe all the data consistently. It is shown that assuming an additional relaxation in GHz region with a constant loss spectrum provides a good agreement of the model with experimental data. (C) 2001 American Institute of Physics.

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收藏

页码：10189 / 10195

页数：7

相关论文

共 30 条

[1] The merging of the dielectric α- and β-relaxations in poly(methyl methacrylate) [J].

Bergman, R ;

Alvarez, F ;

Alegría, A ;

Colmenero, J .

JOURNAL OF CHEMICAL PHYSICS, 1998, 109 (17) :7546-7555

[2] Examining noise sources at the single-molecule level:: 1/f noise of an open maltoporin channel [J].

Bezrukov, SM ;

Winterhalter, M .

PHYSICAL REVIEW LETTERS, 2000, 85 (01) :202-205

[3]

Bottcher C. J. F., 1978, THEORY ELECT POLARIZ, VII

[4] Light-scattering study of a supercooled epoxy resin [J].

Comez, L ;

Fioretto, D ;

Palmieri, L ;

Verdini, L ;

Rolla, PA ;

Gapinski, J ;

Pakula, T ;

Patkowski, A ;

Steffen, W ;

Fischer, EW .

PHYSICAL REVIEW E, 1999, 60 (03) :3086-3096

[5] DYNAMIC MECHANICAL BEHAVIOR OF SOME HIGH POLYMERS AT TEMPERATURES FROM 6 DEGREES K - POLYETHYLENE NYLON 66 POLYPROPYLENE POLY(VINYL CHLORIDE) POLY(D,L-PROPYLENE OXIDE) POLYBUTENE-1 POLY(4-METHYL-PENTENE-1) POLY(METHYL METHACRYLATE) POLY(ETHYL METHACRYLATE) POLY-U-METHYLPENTENE-I E) [J].

CRISSMAN, JM ;

SAUER, JA ;

WOODWARD, AE .

JOURNAL OF POLYMER SCIENCE PART A-GENERAL PAPERS, 1964, 2 (12PA) :5075-&

[6] Electronic density fluctuations in disordered systems .1. Effect of thermal treatments on the dynamics and local microstructure of poly(methyl methacrylate) [J].

Faivre, A ;

David, L ;

Vassoille, R ;

Vigier, G ;

Etienne, S ;

Geissler, E .

MACROMOLECULES, 1996, 29 (26) :8387-8390

[7] ULTRASONIC STUDIES OF SOME POLYMERS AT LOW-TEMPERATURES [J].

FEDERLE, G ;

HUNKLINGER, S .

JOURNAL DE PHYSIQUE, 1982, 43 (NC-9) :505-508

[8] Spectrum of fast dynamics in glass forming liquids: Does the "knee'' exist? [J].

Gapinski, J ;

Steffen, W ;

Patkowski, A ;

Sokolov, AP ;

Kisliuk, A ;

Buchenau, H ;

Russina, M ;

Mezei, F ;

Schober, H .

JOURNAL OF CHEMICAL PHYSICS, 1999, 110 (05) :2312-2315

[9] AN ASYMMETRIC DOUBLE-WELL POTENTIAL MODEL FOR STRUCTURAL RELAXATION PROCESSES IN AMORPHOUS MATERIALS [J].

GILROY, KS ;

PHILLIPS, WA .

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1981, 43 (05) :735-746

[10]

Jackle J., 1981, AMORPHOUS SOLIDS LOW