Dilatometric studies of physical aging of polyetherimide

J. W. Sobieski, S. L. Simon, D. J. Plazek

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1 Scopus citations

Abstract

Physical aging of polyetherimide (PEI) was studied using a bellows dilatometer based on Zoller's design. A linear variable differential transformer (LVDT) is used to measure the displacement of the bellows. The voltage output of the LVDT is interfaced to a computer for automated data collection. Isothermal aging experiments were carried out at temperatures near the glass temperature (206-209°C) using a constant temperature oil bath maintained at the desired aging temperature. The time required to reach equilibrium and the reduced curve produced by aging time-temperature superposition are given. The results compare well with data obtained by capillary dilatometry for the same material.

Original languageEnglish
Pages (from-to)455-460
Number of pages6
JournalJournal of Thermal Analysis
Volume49
Issue number1
DOIs
StatePublished - 1997

Keywords

  • Glass
  • Physical aging
  • Polyetherimide
  • Volume recovery

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