BLAZHNOV, I. V., MALOMUZH, N. P. and LISHCHUK, S. V. (2004). Temperature dependence of density, thermal expansion coefﬁcient and shear viscosity of supercooled glycerol as a reﬂection of its structure. The Journal of Chemical Physics, 121 (13), 6435-6441.Full text not available from this repository.
The relationship of the microstructure of supercooled, highly viscous glycerol to the temperature dependence of its density, thermal expansion coefﬁcient, and shear viscosity are discussed. The character of this temperature dependence at the transition from low viscosity state to the solid amorphous state solidiﬁed state without nuclei is described with help of function psi, which can be interpreted as the effective number of degrees of freedom responsible for the change of viscosity of glycerol over a broad range; these degrees of freedom are those related to the alpha-relaxation process. It is shown that the change in effective activation energy of the viscosity is completely determined by the parameter psi. The change in the shear viscosity of glycerol due to the inﬂuence of the solid-phase nuclei is considered. It is shown that the introduction of the parameter phi, equal to the speciﬁc volume occupied by the nuclei of the solid phase, together with psi provides a natural explanation of the temperature dependence of density and thermal expansion coefﬁcients of glycerol in its liquid, solid amorphous, glassy, and crystal states. The peculiarities of the temperature dependence of phi(T) and psi(T) for glycerol and o-terphenyl are compared.
|Research Institute, Centre or Group:||Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology|
|Depositing User:||Sergey Lishchuk|
|Date Deposited:||15 Mar 2010 17:07|
|Last Modified:||15 Mar 2010 17:07|
Actions (login required)
Downloads per month over past year