Mechanical Properties of Poly(3-hydrobutyrate-co-hydroxyvalerate)/ Biodegradable Hyperbranched Poly(ester amide) Blends

Abstract:

Biodegradable composites were prepared by adding hyperbranched poly (ester amide) (HBPs) into poly (3-hydroxybutyrate-co-3-hydrovalerate) (PHBV) through melt blending method. It was found that the tensile strength and toughness of PHBV were simultaneously enhanced by the addition of HBPs. Compared with neat PHBV, the tensile strength of the composite increased about 23% from 20.96 to 25.87 MPa for the content of 2.5 wt.% HBPs, and more remarkable enhancement in tensile elongation at break can be achieved by about 88% for 5 wt.% HBPs. The influences of HBPs on crystallization, thermal and fracture morphologies of PHBV were further evaluated by using differential scanning calorimeter and scanning electron microscope, respectively. The decrease in the crystallinity of PHBV and high dispersion of the HBPs in PHBV matrix were observed, which should contribute to the improvement on the mechanical properties of PHBV.

• Periodical: Materials Science Forum (Volumes 745-746)
• Pages: 436-441
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.745-746.436
• Online since: February 2013
• Authors: Pei Liu, Long Chen, Jun Xu, Mei Fang Zhu, Zong Yi Qin
• Keywords: Hyperbranched Poly(ester amide), Mechanical Property, Melt Blending, Poly(3-hydroxybutyrate-co-3-hydrovalerate)

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