Abstract
A general relation between the temperature shift factor a T and reduced volume ṽ, based on the Doolittle viscosity-volume equation, is considered. The shift factor and the specific volume are assumed to be continuous functions of the temperature T above, at, as well as below the glass transition region. A specific a T(T) formula is obtained by using the Guggenheim-Lu-Ruether density equation; knowledge of the characteristic volume v ∗ is not needed. Precise a T(T) values for a structural adhesive obtained by Kenner, Knauss and Chai have been represented before by two W-L-F equations, one above and the other below the glass transition temperature. The same set of the shift factor values is now represented by a single equation with good accuracy. Accurate data on the temperature dependence of specific volume, v(T), have been obtained from a T(T) values.
Sign-in/Register to access full text options 
Free) 
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
