Mechanical properties and structure of injection molded poly(hydroxybutyrate‐co‐hydroxyvalerate)/poly(butylene adipate‐co‐terephthalate) (PHBV/PBAT) blends

Abstract

Blending poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) and poly(butylene adipate-co-terephthalate) (PBAT) presents an effective approach to fabricate fully biodegradable polymer blends with tailored mechanical properties. This study investigated the composition on the mechanical properties and structure of PHBV/PBAT blend. The remarkable enhancement in elongation of the PHBV/PBAT blends was shown due to the ductile PBAT. The fracture behavior of the PHBV/PBAT specimens transited from brittle to ductile with the increase of the PBAT in the blends. Two different phases as a co-continuous microstructure with a large interpenetrating structure indicate immiscibility between PHBV and PBAT in the PHBV/PBAT (50:50) specimen. The miscibility, intermolecular interaction, and mechanical properties of PHBV/PBAT blends were also investigated by molecular dynamics simulation. The results showed the immiscibility of PHBV and PBAT. The degradation temperature

Shrink-Resistant Poly(butylene adipate-co-terephthalate) Foam Reinforced with Crystalline Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Particles

“…The melting temperature ( T m ) and crystallinity (χ c ) are listed in Table , which indicated a substantial reduction in crystallinity for both PBAT and PHBV after blending. This reduction can be attributed to the interaction between the molecular chains of PHBV and PBAT, which hindered the crystallization process . The substantial decline in crystallinity for both polymers after blending further confirmed the compatibility between PHBV and PBAT, consistent with the SEM results.…”

“…This reduction can be attributed to the interaction between the molecular chains of PHBV and PBAT, which hindered the crystallization process. 34 The substantial decline in crystallinity for both polymers after blending further confirmed the compatibility between PHBV and PBAT, consistent with the SEM results. Figure 4c presents the DSC profiles of the 80PBAT/20PHBV samples before and after the foaming process.…”

“…As a result, the stiffness of the cell walls was significantly improved, leading to enhanced dimensional stability. PHBV stands out as an exceptionally promising candidate, with a crystallinity of up to 60% and T c (118.98 °C) matching well with PBAT foaming temperature, while also exhibiting medium compatibility with PBAT. − …”