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Characterization of Poly(Diethylene Glycol Adipate -co- Neopentylglycol Adipate) as a New Plasticizer for Poly(Lactic Acid)

A new poly (diethylene glycol adipate -co- neopentylglycol adipate) (PDNA) was synthesized from diethylene glycol adipate (DEAP) with neopentylglycol adipate (NPAP). The chemical structure of PDNA was characterized by 1H-NMR. PLA was plasticized by various amount of PDNA to obtain biodegradable blends. The effects of both temperature and shear rate on the rheologies of PLA/PDNA blends were evaluated by a parallel plate rheometer.