Mechanical properties of comonomer-compositionally fractionated poly[(3-hydroxybutyrate)-co-(3-mercaptopropionate)] with low 3-mercaptopropionate unit content.
The mechanical properties, such as Young's modulus, yield strength, and the elongation at breakage, were investigated for several sulfur-containing biopolymers P(3HB-co-3MP). A series of P(3HB-co-3MP) samples with 3MP unit content ranging from 6.6 to 39.1 mol-% was biosynthesized by fermentation using the PHA-synthesizing bacteria Cupriavidus necator. For comparison, the bacterially synthesized P(3HB) and P(3HB-co-3HP) with the 3HP unit content ranging from 13.1 to 21.1 mol-% were also investigated. It was found that the sulfur-containing P(3HB-co-3MP) is much more durable to stretching. Notably, P(3HB-co-3MP) with the 3MP unit content of only 6.6 mol-% was found to show excellent mechanical properties.
Yu
Fang
F
Department of Biomolecular Engineering, Tokyo Institute of Technology, Nagatsuta 4259-B-55, Yokohama 226-8501, Japan.
Dong
Tungalag
T
Zhu
Bo
B
Tajima
Kouichirou
K
Yazawa
Kouji
K
Inoue
Yoshio
Y
D015097:3-Mercaptopropionic Acid / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D002849:Chromatography, Gas; D020118:Cupriavidus necator / Q000737:chemistry; D006885:Hydroxybutyrates / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011091:Polyesters / Q000737:chemistry*; D013718:Tensile Strength; D014961:X-Ray Diffraction
D006885:Hydroxybutyrates; D011091:Polyesters; D015097:3-Mercaptopropionic Acid