Physical aging is ubiquitous in glassy materials and originates from their out-of-equilibrium nature. This phenomenon is of great technological and fundamental interest and it is especially relevant in glassy polymers. Here, we summarize the main aspects of the phenomenology of physical aging: (1)...
Increasing concentration of cross-linked agents in polymer samples to 11.2 mol.% is accompanied with degeneration of high-temperature component of relaxation, and complete relaxation of plastic deformation proceeds via low-temperature component. The effect of cross-linking on temperature-induced relaxation...
For various polymer glasses, the temperature-induced recovery of residual deformation was studied. The ratio between the low-temperature and high-temperature recovery components is controlled by the difference between deformation temperature and glass transition temperature Tg of polymer samples independently ...
Physical aging of polymers 1995, Progress in Polymer Science Show abstract Influence of physical ageing on the yield response of model DGEBA/poly(propylene oxide) epoxy glasses 1992, Polymer Show abstract Mechanical rejuvenation in polymer glasses: Fact or fallacy? 2003, Journal of Physics Condensed ...
Understanding and controlling physical aging, that is, the spontaneous temporal evolution of out-of-equilibrium systems, represents one of the greatest tasks in material science. Recent studies have revealed the existence of a complex atomic motion in metallic glasses, with different aging regimes in ...
Relaxation transitions in epoxy oligomers of various chemical nature and three-dimensional polymer networks on their basis are considered. Additional facto
Huang, Y.; Wang, X.; Paul, D. R. Physical aging of thin glassy polymer films: free volume interpretation.J. Membr. Sci.2226,277, 219–229. Google Scholar Cowie, J. M. G.; Ferguson, R. Physical aging studies in poly(vinyl methyl ether). 1. Enthalpy relaxation as a function of ...
Residual stresses are pervasive in most modern plastics. Here, the authors show that they promote the migration of low-molecular-weight amorphous polymer and additives from bulk plastics and release micropollutants into water. Dunzhu Li Peijing Li ...
pain in rehabilitation routines. Virtual reality provides distraction and adherence to the therapy, and in the literature has been implemented frequently. However, the systems analyzed in the literature have generally been limited to visual and auditory feedback using monitors or directly VR glasses. ...
obtained. Because of different rates of segmental motions in the intermolecular environment of a chemically distinct neighboring chain, one expects that physical aging changes the thermal features of a polymer blend with respect to the unmixed state. A recent review on the physical aging of polymer ...