Abstract
The reaction kinetics of commercial high-performance matrices has been characterized by differential scanning calorimetry (DSC). Standard and new toughened epoxy matrix prepregs based on tetraglycidyl diamino diphenyl methane-diamino diphenyl sulfone (TGDDM-DDS) formulations have been studied. The toughened epoxy matrix prepreg, modified by addition of a second thermoplastic phase, is characterized by a lower reactivity, probably affected by the presence of the second non-reactive thermoplastic phase. The effect of diffusion control phenomena on the reaction kinetics, associated with evolution of the glass transition temperature as a function of the degree of polymerization and crosslinking, has been considered in the formulation of a modified nth-order kinetic model. This describes incomplete reactions in isothermal tests and the heating rate dependence of dynamic test results, and can thus be used to describe the behaviour of the reactive matrix during processing under complex thermal conditions.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
