| http://www.w3.org/ns/prov#value | - In a thermoplastic polymer composition comprising a linear aromatic polyester of a bisphenol and a dicarboxylic acid, the improvement wherein the polyester contains, in admixture, a minor proportion based on the weight of the polyester of a compound of the formula: ##STR7## wherein M is hydrogen, alkali metal, ammonium, alkyl-substituted ammonium, or mixture thereof,n' is 4, 5 or 6, R is an alkyl
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