Abstract
Relaxation dynamics of low molecular glass-forming liquid triphenylomethane triglycidyl ether was studied under isothermal and isobaric conditions using dielectric spectroscopy. In addition we also carried out pressure-volume-temperature, PVT, measurements. The data enable us to examine the relaxation rate as functions of temperature, pressure and volume. Among other observed properties, it was found that temperature dependence of the α-relaxation times in vicinity of glass transition exhibit non-Arrhenius behavior even at constant volume conditions. Our findings confirm the thesis postulated by M. L. Ferrer and co-workers in J. Chem. Phys. 109, 8010 (1998) that temperature is a dominant control variable, which is responsible for the spectacular non-Arrhenius increase of relaxation rate near Tg. The pressure dependence of the glass transition temperature has also been determined both from dielectric and volumetric data. Satisfactory agreement between results obtained from the two methods has been found.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
