In Situ Characterization of the Reaction-Diffusion Behavior during the Gradient Interphase Formation of Polyetherimide with a High-Temperature Epoxy System

Lucian Zweifel*, Christian Brauner, Julie Teuwen, Clemens Dransfeld

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)
64 Downloads (Pure)

Abstract

This study presents two novel methods for in situ characterization of the reaction-diffusion process during the co-curing of a polyetherimide thermoplastic interlayer with an epoxy-amine thermoset. The first method was based on hot stage experiments using a computer vision point tracker algorithm to detect and trace diffusion fronts, and the second method used space-and time-resolved Raman spectroscopy. Both approaches provided essential information, e.g., type of transport phenomena and diffusion rate. They can also be combined and serve to elucidate phenomena occurring during diffusion up to phase separation of the gradient interphase between the epoxy system and the thermoplastic. Accordingly, it was possible to distinguish reaction-diffusion mechanisms, describe the diffusivity of the present system and evaluate the usability of the above-mentioned methods.

Original languageEnglish
Article number435
Number of pages19
JournalPolymers
Volume14
Issue number3
DOIs
Publication statusPublished - 2022

Keywords

  • Characterization
  • Interphase formation
  • Optical proper-ties/techniques
  • Raman spectroscopy
  • Reaction-diffusion
  • Thermoplastic
  • Thermoset resin

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