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Effect of Oligo-Hydroxyalkanoates on Poly(3-Hydroxybutyrate-co-4-Hydroxybutyrate)-Based Systems

Macromolecular Materials and Engineering, 2015
This study presents the utilization of oligo-hydroxyalkanoates obtained from controlled degradation of poly(3-hydroxybutyrate) as additives in a poly(3-hydroxybutyrate-co-4-hydroxybutyrate) copolymer matrix (P(3HB-co-4HB)). These oligomers are compared to a conventional biobased plasticizer, used as reference, based on a monoglyceride acetate obtained ...
Meszynska, A, Pollet, Eric, Odelius, K, Hakkarainen, M, Avérous, Luc   +4 more
openaire   +4 more sources

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Production of Poly(3-Hydroxybutyrate-Co-4-Hydroxybutyrate) by Ralstonia eutropha

Biochemical Engineering Journal, 2005
Abstract Ralstonia eutropha ATCC 17699 was grown to produce poly(3-hydroxybutyrate- co -4-hydroxybutyrate) [P(3HB- co -4HB)] from fructose and γ-butyrolactone. Through flask cultures, it was found that R. eutropha cells were inhibited by high concentrations of fructose (more than 20 g/L) and γ-butyrolactone (more than 6 g/L).
Beom Soo Kim
exaly   +2 more sources

Thermal degradation behavior of poly[(R)-3-hydroxybutyrate-co-4-hydroxybutyrate]

Polymer Degradation and Stability, 2021
Abstract The thermal degradation behavior of poly[(R)-3-hydroxybutyrate-co-16 mol%-4-hydroxybutyrate] (P(3HB-co-16 mol%-4HB)) was investigated based on spectroscopic analysis of its pyrolyzates and two kinetic modeling approaches. Pyrolyzate analysis revealed that trans-crotonic acid, cis-crotonic acid, γ-butyrolactone, and their oligomers (dimers ...
Taku Omura, Tatsuya Goto, Akira Maehara, Satoshi Kimura, Hideki Abe, Tadahisa Iwata   +5 more
openaire   +2 more sources

Production of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) in recombinant Escherichia coli grown on glucose

Journal of Biotechnology, 1997
A recombinant Escherichia coli strain has been developed that produces poly(3-hydroxybutyrate-co-4-hydroxybutyrate) when grown in complex medium containing glucose. This has been accomplished by introducing into E. coli DH5 alpha separate plasmids harboring the polyhydroxyalkanoate (PHA) biosynthesis genes from Ralstonia eutropha (formerly named ...
H E, Valentin, D, Dennis
openaire   +3 more sources

Alternative Block Polyurethanes Based on Poly(3-Hydroxybutyrate-Co-4-Hydroxybutyrate) and Poly(Ethylene Glycol)

Biomaterials, 2009
A series of amphiphilic alternative block polyurethane copolymers based on poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3/4HB) and poly(ethylene glycol) (PEG) were synthesized by a coupling reaction between P3/4HB-diol and PEG-diisocyanate, with different 3HB, 4HB, PEG compositions and segment lengths. Stannous octanoate was used as catalyst.
Kaitian Xu, Zhifei Chen, Jueyu Pan
exaly   +3 more sources

Biodegradable Block Poly(Ester-Urethane)s Based on Poly(3-Hydroxybutyrate-Co-4-Hydroxybutyrate) Copolymers

Biomaterials, 2011
A series of block poly(ester-urethane)s (abbreviated as PU3/4HB) based on biodegradable poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3/4HB) segments were synthesized by a facile way of melting polymerization using 1,6-hexamethylene diisocyanate (HDI) as the coupling agent and stannous octanoate (Sn(Oct)(2)) as catalyst, with different 4HB contents ...
Kaitian Xu, Zhifei Chen, Handi Qiu
exaly   +3 more sources

Chemical Synthesis of High Molecular Weight Poly(3-Hydroxybutyrate-Co-4-Hydroxybutyrate)

Polymer, 1995
Abstract The reaction of optically active β-butyrolactone with γ-butyrolactone in the presence of a distannoxane complex as a catalyst at 100°C yielded a high molecular weight poly)(3-hydroxybutyrate-co4-hydroxybutyrate).
Yoji Hori, Akio Yamaguchi
exaly   +2 more sources