Hyperbranched poly(ester)s containing reactive end-group functionality may serve as useful platforms for the support and controlled-release of actives in several areas; agriculture, personal care, pharmaceutical formulation, food preservation, etc. A trimethylolpropane/adipic acid hyperbranched poly(ester) has been synthesized under conditions which prevent gelation and assure the presence of carboxyl end-groups. The polymer has been fully characterized using chromatographic, spectroscopic and thermal methods. The thermal stability of the polymer has been assessed using thermogravimetry and infrared spectroscopy. An initial fragmentation event is decarboxylation of carboxyl chain ends. This is followed by ester fragmentation.
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