Abstract
The slow molecular mobility in high-cis poly (1,4-isoprene) has been studied by the dielectric technique of thermally stimulated currents. Three different kinds of motional processes have been identified: the Johari–Goldstein relaxation, the main or α-process and a mobility appearing above Tg that has been ascribed to the normal mode process. The temperature location of these relaxations was respectively at −85 to −80°C, at −73°C and at −65°C. The fragility or steepness index was found to be mα=60 and mn=37, respectively for the α and the normal mode processes, in excellent agreement with the results obtained by dielectric relaxation spectroscopy (DRS).
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
