Cured polyesters based upon bisacid A2: Water absorption,toluene resistance,and resistance to 5% aqueous HNO3 and NaOH

Earlier papers have described the preparation and purification of bisacid A2,^1,2 the preparation and cure of crosslinkable polyesters,³ the thermal properties of cast sheet,⁴ and the mechanical properties of glass fiber laminates⁵ which were made from reactants that included bisacid A2 in two series of cocondensates. The present paper details the water absorption and the long-term effects (up to 12 months) of toluene, 5% aq. HNO₃, and 5% aq. NaOH. The effects of the last two were found to be negligible, but the water absorption and the toluene resistance appeared to be capable of correlation with the known composition and the inferred structure of the copolyesters.