Heterogeneity at the Glass Transition: Translational and Rotational Self-Diffusion

by: I Chang, H Sillescu

J. Phys. Chem. B, Vol. 101, No. 43. (23 October 1997), pp. 8794-8801.

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DOI, American Chem. Soc. Publications

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Abstract

Abstract: Self-diffusion coefficients, D, have been measured in the glass forming liquids salol, glycerol, phenolphthaleine dimethyl ether (PDE), cresolphthaleine dimethyl ether (CDE), and -trinaphthylbenzene (TNB) in the supercooled regime. The NMR static magnetic field gradient technique was applied where D >10-14 m2 s-1 can be attained. The results are similar to previous diffusion experiments where an enhancement of translational diffusion was found in comparison with rotational diffusion and shear viscosity. Various models of spatial heterogeneity are related to a phenomenological environmental fluctuation model in view of recent diffusion and relaxation data close to the glass transition.

@article{citeulike:1995949, abstract = {Abstract: Self-diffusion coefficients, D, have been measured in the glass forming liquids salol, glycerol, phenolphthaleine dimethyl ether (PDE), cresolphthaleine dimethyl ether (CDE), and -trinaphthylbenzene (TNB) in the supercooled regime. The NMR static magnetic field gradient technique was applied where D >10-14 m2 s-1 can be attained. The results are similar to previous diffusion experiments where an enhancement of translational diffusion was found in comparison with rotational diffusion and shear viscosity. Various models of spatial heterogeneity are related to a phenomenological environmental fluctuation model in view of recent diffusion and relaxation data close to the glass transition.}, address = {Institut f\"{u}r Physikalische Chemie, Johannes Gutenberg-Universit\"{a}t Mainz, D-55099 Mainz, Germany}, author = {Chang, I. and Sillescu, H. }, citeulike-article-id = {1995949}, doi = {10.1021/jp9640989}, journal = {J. Phys. Chem. B}, keywords = {glass, heterogeneity, rotation}, month = {October}, number = {43}, pages = {8794--8801}, posted-at = {2008-03-04 20:54:52}, priority = {2}, title = {Heterogeneity at the Glass Transition: Translational and Rotational Self-Diffusion}, url = {http://dx.doi.org/10.1021/jp9640989}, volume = {101}, year = {1997} }

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TY - JOUR ID - citeulike:1995949 L3 - citeulike-article-id:1995949 TI - Heterogeneity at the Glass Transition: Translational and Rotational Self-Diffusion JF - J. Phys. Chem. B VL - 101 IS - 43 SP - 8794 EP - 8801 AD - Institut für Physikalische Chemie, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany N2 - Abstract: Self-diffusion coefficients, D, have been measured in the glass forming liquids salol, glycerol, phenolphthaleine dimethyl ether (PDE), cresolphthaleine dimethyl ether (CDE), and -trinaphthylbenzene (TNB) in the supercooled regime. The NMR static magnetic field gradient technique was applied where D >10-14 m2 s-1 can be attained. The results are similar to previous diffusion experiments where an enhancement of translational diffusion was found in comparison with rotational diffusion and shear viscosity. Various models of spatial heterogeneity are related to a phenomenological environmental fluctuation model in view of recent diffusion and relaxation data close to the glass transition. KW - glass KW - heterogeneity KW - rotation AU - Chang, I AU - Sillescu, H PY - 1997/10/23/ UR - http://dx.doi.org/10.1021/jp9640989 ER -

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