Viscosity Behavior of Glass-forming Liquids and Fluid ity Equation

A glass forming liquid is kno wn to not forming crystals upon cooling a nd undergoes a liquid – glass tr ansition. When the tem perature of a liquid d ecreases its viscosity increases and below th e melting point (Tm), in the cas e of a sup ercooled liq uid, near to the glass transition temperatur e (Tg), the viscosity continues increasing until the liquid solidifies. Some information about th e nature of the glas s transition can be attained by surveying th e manner in which t he viscosit y approaches to a lim iting value in the solid state. Rec ently, we h ave developed a new equation for the temperature dependent viscosity of ionic liquids [۱]. In this investigation, we e xamined th e applica bility of this equation for the conventional glass-forming liquids including Į-phenyl-o-cresol, salol and tri-Į-napht hylbenzene. Also dynamic crossover pheno menon as a commo n behavior for glassy liquids is investigated

کلیدواژه ها:

Glass-formers ، Co rrelation ، Dynamic cr ossover ، Fl uidity equation