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

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

Zweifel, Lucian (University of Applied Sciences and Arts Northwestern Switzerland)
Brauner, Christian (University of Applied Sciences and Arts Northwestern Switzerland)
Teuwen, Julie J.E. (TU Delft Aerospace Manufacturing Technologies)
Dransfeld, C.A. (TU Delft Aerospace Manufacturing Technologies)

2022

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.

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

http://resolver.tudelft.nl/uuid:dbb8d5a8-a84e-48e3-8c47-27aa26878299

https://doi.org/10.3390/polym14030435

2073-4360

Polymers, 14 (3)

Institutional Repository

journal article

© 2022 Lucian Zweifel, Christian Brauner, Julie J.E. Teuwen, C.A. Dransfeld