Prepreg resin isothermal cure

Figure Changes in Prepreg Resin Composition During Isothermal Cure at 90°C.

The isothermal cure kinetics of the prepreg has characteristics similar to those reported for th.e neat resin (5). Rutocatalysis and diffusion control are observed and similar heats of reaction and activation energies are determined. The extents of reaction at the gel point estimated by DSC and torsional braid analysis of the neat resin(s) correspond to values determined gravlmetrlcally in this study. The low value of the reaction ratio dlcy/enoxy at the lower curing temperatures would explain the unreacted dicy noted by Schneider et. al ( ). [Pg.244]

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