TY - JOUR
T1 - Translation-rotation paradox for diffusion in glass-forming polymers
T2 - The role of the temperature dependence of the relaxation time distribution
AU - Hall, David B.
AU - Dhinojwala, Ali
AU - Torkelson, John M.
PY - 1997
Y1 - 1997
N2 - Comparisons are made of the translational and rotational diffusion of small-molecule probes in a polymer near its glass transition temperature, Tg. In the rubbery state, 1. 1Tg > T > Tg, translational diffusion is much less temperature dependent than rotational reorientation; in a “quenched” glass, translation and rotation have similar temperature dependencies. This is explained to be a consequence of the fact that in the rubbery state near Tg the breadth of the polymer relaxation distribution is strongly temperature dependent, while in the quenched glass it is temperature invariant.
AB - Comparisons are made of the translational and rotational diffusion of small-molecule probes in a polymer near its glass transition temperature, Tg. In the rubbery state, 1. 1Tg > T > Tg, translational diffusion is much less temperature dependent than rotational reorientation; in a “quenched” glass, translation and rotation have similar temperature dependencies. This is explained to be a consequence of the fact that in the rubbery state near Tg the breadth of the polymer relaxation distribution is strongly temperature dependent, while in the quenched glass it is temperature invariant.
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U2 - 10.1103/PhysRevLett.79.103
DO - 10.1103/PhysRevLett.79.103
M3 - Article
AN - SCOPUS:3743107779
SN - 0031-9007
VL - 79
SP - 103
EP - 106
JO - Physical review letters
JF - Physical review letters
IS - 1
ER -