Verifying the Approximate Coinvariance of the α and Johari-Goldstein β Relaxation Times to Variations of Pressure and Temperature in Polyisoprene
Sign Up to like & getrecommendations! Published in 2018 at "Macromolecules"
DOI: 10.1021/acs.macromol.8b00811
Abstract: From dielectric spectroscopy measurements on polyisoprene performed at ambient and elevated pressures, we show that the secondary relaxation has properties of the supposedly universal Johari–Goldstein β-relaxation. These properties include approximate (i.e., in order of magnitude… read more here.
Keywords: johari goldstein; relaxation; goldstein relaxation; approximate coinvariance ... See more keywords
Clarifying the nature of the Johari-Goldstein β-relaxation and emphasising its fundamental importance
Sign Up to like & getrecommendations! Published in 2020 at "Philosophical Magazine"
DOI: 10.1080/14786435.2020.1781276
Abstract: ABSTRACT Since 1998 the primitive relaxation time τ 0(T,P) of the Coupling Model (CM) and the Johari-Goldstein (JG) β-relaxation time τJG (T,P) are shown approximately equal in many glass-formers. The CM relation between τ 0(T,P)… read more here.
Keywords: johari goldstein; relaxation time; relaxation; goldstein relaxation ... See more keywords