Thermal behaviour of films of partially neutralized poly(acrylic acid). 1: Influence of metal ions

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Abstract
A series of partially neutralized poly(acrylates) has been prepared, and reactions occurring on heating them at 250°C have been studied. It was found that different chemical processes occurred at this temperature, depending on the nature of the counter ion. Univalent cations gave films of excellent chemical resistance in which anhydride formation had occurred, followed by rapid and substantial decarboxylation. Polyvalent cations, by contrast, gave films which, though water insoluble, were of inferior chemical resistance. They were found to have undergone anhydride formation, but not subsequent decarboxylation.

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