Characterization of temperature-dependent moisture diffusivity in PMR-15 resin

Yunn Tzu Yu, Kishore Pochiraju

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The temperature-dependent moisture diffusion behavior of high-temperature polyimide resin, PMR15, is presented. Adsorption and high temperature desorption tests are used to experimentally determine moisture diffusivity at several temperatures. Diffusivity is determined from the weight change based on the initial slope and using a nonlinear regression technique with Fickian diffusion assumption. The basic test procedures and diffusivity values are presented in this study. The results also include the relative humidity (RH) dependent equilibrium moisture concentration and a relationship between the RH and equilibrium moisture concentration. As direct measurement at typical operating temperature may be precluded by blistering, an Arrhenius-type temperature-diffusivity relationship is used to estimate the temperature-dependent moisture diffusivity for the PMR-15 resin. The moisture diffusivity of PMR-15 tested is estimated to be 6.64 E -10 m2/s at 288°C.

Original languageEnglish
Pages (from-to)1281-1290
Number of pages10
JournalJournal of Applied Polymer Science
Volume106
Issue number2
DOIs
StatePublished - 15 Oct 2007

Keywords

  • Adsorption
  • Desorption
  • Fickian
  • Moisture diffusivity
  • PMR-15

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