A nonlinear regression approach to model the physical aging of poly(ether imide)

Eamor Woo, Sen Maw Kuo

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Differential scanning calorimetry (DSC) was used to measure the relaxation enthalpy of glassy amorphous poly(ether imide) (PEI) at three high isothermal aging temperatures between 190 and 200°C. A three-parameter model based on the Williams-Watts relaxation function was utilized to describe the aging process of PEI, and nonlinear regression approach was used to estimate the model parameters. The prediction according to this model was found to be more accurate in comparison with the two-parameter model based on the same Williams-Watts relaxation function. Furthermore, the peculiar aging behavior at the highest aging temperature of 200°C was explained from the molecular view point of transition from sub-Tg β-relaxation to α-relaxation near Tg.

Original languageEnglish
Pages (from-to)173-177
Number of pages5
JournalPolymer Engineering and Science
Volume37
Issue number1
DOIs
Publication statusPublished - 1997 Jan 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'A nonlinear regression approach to model the physical aging of poly(ether imide)'. Together they form a unique fingerprint.

Cite this