Abstract
The internal friction spectra λ = f(T) and the temperature dependence ν = f(T) of the frequency of free damping in the temperature range from –150°C to 120°C of microwave-irradiated and nonirradiated samples of polyvinyl alcohol were obtained. A theoretical analysis of nature of the peak located on the ascending branch of the α-peak of relaxation losses on the internal friction spectrum is carried out, and its disappearance after the microwave irradiation is explained. A comparison of changes in the continuous spectrum of relaxation times in the region of glass-transition temperature is performed. It is established that microwave irradiation expands the spectrum of relaxation time, and, consequently, increases the relaxation microinhomogeneity of the α-relaxation process.
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
