Some previously unexplained relaxation phenomena were here explained quantitatively in terms of the defect diffusion model. These included widely differing pre-exponentials, exponents and thus fragility. The defect diffusion model was used to give a qualitative explanation of many of the properties which glasses and liquids exhibited. These included interpretations of the glass transition, the liquid–liquid transition, the crystalline melting temperature and the differing values of the characteristic temperature that some materials exhibited for different types of physical measurement. Qualitative explanations were also given for the origin of secondary relaxations such as the excess wing and the β-relaxation. The boson peak was considered in terms of the defect diffusion model. It was pointed out that, in the defect diffusion model, universality was embodied within the defects, via free volume.

The Defect Diffusion Model and the Properties of Glasses and Liquids. J.T.Bendler, J.J.Fontanella, M.F.Shlesinger: Journal of Non-Crystalline Solids, 2006, 352[42-49], 4835-42