Bio-poly ester-urethane s

The most common bio-aliphatic polyesters are poly(lactic acid) (PLA), poly(lactic-co-glycolic acid) (PLGA), polyfe-caprolactone) (PCL), and poly(3-hydroxybutyrate) (PHB). While PLA, PLGA, and PHB are bio-based, PCL is obtained from the chemical conversion of crude oil. But all of them are biodegradable and biocompatible. Thus, they attract increasing attention in biomedical applications. However, the biopolyesters present poor thermal stability with respect of traditional oil-based polyesters. 

Many practical modifications have been proposed to improve biopolyesters thermal stability such as blending with other biopolymers, reinforcing with natural as well as inorganic fillers. Likewise, the development of bio-based poly(ester-urethane)s has gain considerable attention to improve biodegradable polymers thermal stability. 

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However, in this chapter, we will focus the attention on vegetable oil-based PU and on the bio-poly(ester urethane)s as the most common and useful bio-based PU in the main industrial applications. 

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