Prepregs with long service life. 2. Rheokinetic selection of industrial types of epoxy resins and curing agents

摘要

The potential for primary kinetic selection of binder components for prepregs with a long service life using an isothermic calorimeter has already ben dmeonstrated [1]. This method enabled the reactivity of binder components at prepreg storage temperatures T_store to be evaluated from the initial rates of the curing process. It does not, however, allow the maximum kinetic service life [tau~20_gel), linked to the gelation time for the binder at T_store [2], to be forecast, because the latter also depends on the functional properties of the components.