Abstract
The addition of a brominated epoxy resin as a chain extender to di-, tri-, and tetrafunctional epoxy systems cured with diaminodiphenylsulfone has been investigated. The effect of increased BER content on the glass transition temperature of the cross-linked systems is discussed. The Tg of these systems is in the order Tg (tri) > Tg (tetra) > Tg (di). The contributions of the chemical structure and the cross-link density to the glass transition temperature are calculated. The kinetics of the reaction was followed dynamically by DSC. The overall order of the reaction and activation energies decrease with increased BER content. The thermal stability of these systems is also discussed.
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