Temperature dependence of tracer diffusion coefficients in polystyrene
1986 ◽
Vol 1
(1)
◽
pp. 202-204
◽
Keyword(s):
The temperature dependence of the tracer diffusion coefficient D* of long deuterated polystyrene (d-PS) chains of molecular weight M>Mc, where Mc is the critical molecular weight for entanglement, diffusing into highly entangled PS matrices, each of molecular weight P = 2×107, is studied using forward recoil spectrometry. It is found that the temperature dependence of D*/T, reflected primarily in the monomeric friction coefficient, is accurately described by a Vogel equation. The constants that are used to fit these results are independent of M and are the same as those used to fit the temperature dependence of the zero shear rate viscosity of polystyrene.
1985 ◽
Vol 89
(7)
◽
pp. 1066-1069
◽
2020 ◽
Vol 124
(42)
◽
pp. 22981-22992
1981 ◽
Vol 42
(7)
◽
pp. 599-603
◽
Keyword(s):