Molecular theory of physical aging in polymer glasses

Research output: Contribution to journalArticlepeer-review


A molecular level theory for the physical aging of polymer glasses is proposed. The nonequilibrium time evolution of the amplitude of long wavelength density fluctuations, and its influence on activated barrier hopping, plays an essential role. The theory predicts temperature-dependent apparent power-law aging of the segmental relaxation time and logarithmic aging of thermodynamiclike properties, in good accord with experiments. A physical origin for the quantitative nonuniversal aspects based on the amplitude of quenched density fluctuations is suggested.

Original languageEnglish (US)
Article number167802
JournalPhysical review letters
Issue number16
StatePublished - Apr 20 2007

ASJC Scopus subject areas

  • General Physics and Astronomy


Dive into the research topics of 'Molecular theory of physical aging in polymer glasses'. Together they form a unique fingerprint.

Cite this