Synergistic and Destructive Effect of Processing Additives on the Extrusion of Poly(3-hydroxybutyrate)

Le résumé fourni par la source

Polyhydroxyalkanoates have attracted academic and industrial attention owing to their promising mechanical properties, inherent biodegradability, and biobased nature. However, thermal processing of the most prevalent of these polyesters, poly(3-hydroxybutyrate) (P3HB), is challenging due to thermo-mechanical and thermo-oxidative degradation during melt processing. In this work, we explore the impact of three different additives on P3HB processing. Irganox 1010, a phenolic antioxidant, Stabaxol I, an antihydrolysis agent, and Joncryl ADR4400, a chain extender, are evaluated in isolation and combination to optimize an additive package for improved processability. Each additive improved tensile strength at yield relative to the additive-free control, with the largest improvement seen with the combination of 1 wt % Irganox 1010 and 1.25 wt % Joncryl ADR4400, while combinations of antioxidant and antihydrolysis agents were destructive in effect. Color analysis delineated a relationship between tensile strength at yield and the absolute color difference, highlighting the potential use of color analysis as a nondestructive analytical tool for predicting mechanical performance. Together, these results suggest that additives will play an important role in improving Bioplastic processing and performance.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.