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Showing 1–2 of 2 results
Advanced filters: Author: Sho Furutate Clear advanced filters

  • Polyhydroxyalkanoate copolymers of (2R,3R)-3-hydroxy-2-methylbutyrate and (R)-3-hydroxybutyrate [P(3H2MB-co-3HB)] with various comonomer compositions were biosynthesized using recombinant Escherichia coli. Furthermore, solvent fractionation of P(3H2MB-co-3HB) was performed to obtain copolymers with narrow comonomer-unit compositional distributions. The melting temperature (Tm) of P(3H2MB-co-3HB) as a function of the comonomer content indicated isodimorphism of the copolymer. The fast crystallization behavior of P(3H2MB) was maintained even when it was copolymerized with 3HB. The P(80 mol% 3H2MB-co-3HB) copolymer, with a Tm close to that of P(3HB), exhibited faster crystallization behavior than the P(3HB) homopolymer.

    • Sho Furutate
    • Hideki Abe
    • Takeharu Tsuge
    Research
    Polymer Journal
    Volume: 53, P: 1451-1457

  • The biosynthesis and characterization of a new biodegradable plastic, poly(3-hydroxy-2-methylbutyrate) [P(3H2MB)], which is a member of the bacterial polyhydroxyalkanoate (PHA) family whose members include an α-methylated monomer unit, were investigated. Biosynthesized P(3H2MB) exhibited the highest melting temperature (197 °C) among the biosynthesized PHAs and improved thermal resistance. It also exhibited improved crystallization behavior and mechanical flexibility nearly equal to those of isotactic polypropylene (iPP). The superior physical properties of P(3H2MB) have the potential to open new avenues for the production of high-performance biodegradable plastics for replacing petroleum-based bulk commodity plastics.

    • Sho Furutate
    • Junichi Kamoi
    • Takeharu Tsuge
    ResearchOpen Access
    NPG Asia Materials
    Volume: 13, P: 1-11