TRANSLATIONAL AND ROTATIONAL MOLECULAR-MOTION IN SUPERCOOLED LIQUIDS STUDIED BY NMR AND FORCED RAYLEIGH-SCATTERING

被引：237

作者：

CHANG, I ^{[1
]}

FUJARA, F ^{[1
]}

GEIL, B ^{[1
]}

HEUBERGER, G ^{[1
]}

MANGEL, T ^{[1
]}

SILLESCU, H ^{[1
]}

机构：

[1] UNIV MAINZ,INST PHYS CHEM,D-55099 MAINZ,GERMANY

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1994年 / 172卷

关键词：

D O I：

10.1016/0022-3093(94)90443-X

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

It has been shown that translational diffusion coefficients, D-t, in the supercooled van der Waals liquids, orthoterphenyl, phenolphthaleindimethylether, and salol, have a weaker temperature dependence than the shear viscosity, eta, at T less than or similar to 1.2 T-g and can be described by D-t similar to eta(-xi) with xi < 1, whereas D-r similar to eta(-1) applies for the mean rotational diffusion coefficients, D-r, down to the glass transition temperature, T-g. This apparent decoupling of translational and rotational motion has been discussed in relation with possible anomalous short time diffusion, spatial heterogeneity, and cooperative molecular motions close to T-g.

引用

收藏

页码：248 / 255

页数：8

相关论文

共 31 条

[1] RELAXATION IN LIQUIDS, POLYMERS AND PLASTIC CRYSTALS - STRONG FRAGILE PATTERNS AND PROBLEMS [J].

ANGELL, CA .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1991, 131 :13-31

[2] THE GLASS-TRANSITION OF COLLOIDAL POLYSTYRENE MICRONETWORK SPHERES - A DYNAMIC LIGHT-SCATTERING STUDY [J].

BARTSCH, E ;

FRENZ, V ;

SILLESCU, H .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1994, 172 :88-97

[3] MOLECULAR-DYNAMICS OF VISCOUS-LIQUIDS - COMPARISON OF DIELECTRIC AND KERR-EFFECT RELAXATION FOR TRITOLYL PHOSPHATE, ORTHO-TERPHENYL AND THEIR MIXTURES [J].

BEEVERS, MS ;

CROSSLEY, J ;

GARRINGTON, DC ;

WILLIAMS, G .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS II, 1977, 73 :458-470

[4] COOPERATIVE MOTION IN FRAGILE LIQUIDS NEAR THE GLASS-TRANSITION - PROBE REORIENTATION IN O-TERPHENYL AND POLYSTYRENE [J].

BLACKBURN, FR ;

CICERONE, MT ;

HIETPAS, G ;

WAGNER, PA ;

EDIGER, MD .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1994, 172 (pt 1) :256-264

[5] NEW PERSPECTIVES OF NMR IN ULTRAHIGH STATIC MAGNETIC-FIELD GRADIENTS [J].

CHANG, IY ;

FUJARA, F ;

GEIL, B ;

HINZE, G ;

SILLESCU, H ;

TOLLE, A .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1994, 172 :674-681

[6] COMPARATIVE-STUDY OF THE DEBYE-WALLER FACTOR ANOMALY AT THE GLASS-TRANSITION OF ISOTOPICALLY SUBSTITUTED ORTHOTERPHENYLS [J].

DEBUS, O ;

ZIMMERMANN, H ;

BARTSCH, E ;

FUJARA, F ;

KIEBEL, M ;

PETRY, W ;

SILLESCU, H .

CHEMICAL PHYSICS LETTERS, 1991, 180 (03) :271-274

[7] TRACER DIFFUSION AT THE GLASS-TRANSITION [J].

EHLICH, D ;

SILLESCU, H .

MACROMOLECULES, 1990, 23 (06) :1600-1610

[8]

Eichler H. J., 1986, LASER INDUCED DYNAMI

[9] TRANSLATIONAL AND ROTATIONAL DIFFUSION IN SUPERCOOLED ORTHOTERPHENYL CLOSE TO THE GLASS-TRANSITION [J].

FUJARA, F ;

GEIL, B ;

SILLESCU, H ;

FLEISCHER, G .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1992, 88 (02) :195-204

[10] INFLUENCE OF DATA TREATMENT ON THE SHAPE OF H-2 NMR T(1) CURVES [J].

GEIL, B ;

HINZE, G .

CHEMICAL PHYSICS LETTERS, 1993, 216 (1-2) :51-55

← 1 2 3 4 →