Reconsidering the relation of the JG β-relaxation to the α-relaxation and surface diffusion in ethylcyclohexane

Microscopic Observation of the Anisotropy of the Johari–Goldstein-β Process in Cross-Linked Polybutadiene on Stretching by Time-Domain Interferometry

“…In epoxy resin, the fracture toughness is enhanced by the presence of the JG-β process. , In polycarbonate block copolymers, the brittle-to-ductile transition temperature depends on the mobility of the JG-β relaxation . The importance of JG-β process on the failure strength has also been reported for other materials, such as metallic glasses, where the activation energy for brittle-to-ductile transition and that for JG-β process coincide. , However, the microscopic origin of the JG-β process remains unknown. − …”