Thermal and mechanical behavior of injection molded Poly(3-hydroxybutyrate)/Poly(epsilon-caprolactone) blends
Open Access
- 1 March 2006
- journal article
- Published by FapUNIFESP (SciELO) in Materials Research
- Vol. 9 (1), 25-28
- https://doi.org/10.1590/s1516-14392006000100006
Abstract
Aiming the development of high-performance biodegradable polymer materials, the properties and the processing behavior of poly(3-hydroxybutyrate), P(3HB), and their blends with poly(epsilon-caprolactone), PCL, have been investigated. The P(3HB) sample, obtained from sugarcane, had a molecular weight of 3.0 x 10(5) g.mol¹, a crystallinity degree of 60%, a glass transition temperature (Tg), at - 0.8 °C, and a melting temperature at 171 °C. The molecular weight of PCL was 0.8 x 10(5) g.mol-1. Specimens of 70/30 wt. (%) P(3HB)/PCL blends obtained by injection molding showed tensile strength of 21.9 (± 0.4) MPa, modulus of 2.2 (± 0.3) GPa, and a relatively high elongation at break, 87 (± 20)%. DSC analyses of this blend showed two Tg´s, at - 10.6 °C for the P(3HB) matrix, and at - 62.9 °C for the PCL domains. The significant decrease on the Tg of P(3HB) evidences a partial miscibility of PCL in P(3HB). According to the Fox equation, the new Tg corresponds to a 92/8 wt. (%) P(3HB)/PCL compositionKeywords
This publication has 12 references indexed in Scilit:
- Blendas biodegradáveis de poli(3-hidroxibutirato)/poli(e-caprolactona): obtenção e estudo da miscibilidadeMaterials Research, 2003
- Crystallization behavior and environmental biodegradability of the blend films of poly(3-hydroxybutyric acid) with chitin and chitosanCarbohydrate Polymers, 1999
- Structural effects on enzymatic degradabilities for poly[(R)-3-hydroxybutyric acid] and its copolymersInternational Journal of Biological Macromolecules, 1999
- Polyhydroxyalkanoates, biopolyesters from renewable resources: Physiological and engineering aspectsJournal of Biotechnology, 1998
- Mechanical spectroscopy study on biodegradable synthetic and biosynthetic aliphatic polyestersMacromolecular Symposia, 1997
- Polyhydroxybutyrate, Its Copolymers and BlendsJournal of Macromolecular Science, Part C: Polymer Reviews, 1995
- Physical properties of poly(β-hydroxybutyrate)-poly(ε-caprolactone) blendsPolymer, 1994
- Crystallization and thermal behaviour of poly (d(−) 3-hydroxybutyrate)/poly(epichlorohydrin) blendsPolymer, 1993
- Polymers for biodegradable medical devices: VIII. Hydroxybutyrate-hydroxyvalerate copolymers: physical and degradative properties of blends with polycaprolactoneBiomaterials, 1992
- Enzymatic degradation of binary blends of microbial poly(3-hydroxybutyrate) with enzymatically active polymersPolymer Degradation and Stability, 1992