Results 111 to 120 of about 6,874 (158)
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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 ...
Wenfeng, Ou +3 more
openaire +2 more sources
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 ...
Wenfeng, Ou +3 more
openaire +2 more sources
Journal of Biomedical Nanotechnology, 2019
Nanofibers as niche-biomimetic scaffolds exhibit potential in bone tissue engineering (BTE). Here, poly(3-hydroxybutyrate-co-4-hydroxybutyrate) co-polymer (P34HB)/poly(ethylene glycol) (PEG) nanofiber membranes with a high hydrophilicity and mechanical properties were fabricated by introducing PEG to P34HB via electrospinning. The P34HB/PEG nanofibrous
Zetao, Wang +10 more
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Nanofibers as niche-biomimetic scaffolds exhibit potential in bone tissue engineering (BTE). Here, poly(3-hydroxybutyrate-co-4-hydroxybutyrate) co-polymer (P34HB)/poly(ethylene glycol) (PEG) nanofiber membranes with a high hydrophilicity and mechanical properties were fabricated by introducing PEG to P34HB via electrospinning. The P34HB/PEG nanofibrous
Zetao, Wang +10 more
openaire +2 more sources
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.
Jueyu, Pan +5 more
openaire +2 more sources
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.
Jueyu, Pan +5 more
openaire +2 more sources
Journal of Thermal Analysis and Calorimetry, 2011
Crystallization behaviors and spherulitic morphology of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) [P(3HB-co-4HB)] with different 4-hydroxybutyrate (4HB) molar fraction were investigated by differential scanning calorimetry and polarized optical microscopy.
Xing Wen +4 more
openaire +1 more source
Crystallization behaviors and spherulitic morphology of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) [P(3HB-co-4HB)] with different 4-hydroxybutyrate (4HB) molar fraction were investigated by differential scanning calorimetry and polarized optical microscopy.
Xing Wen +4 more
openaire +1 more source
Chemical synthesis of high molecular weight poly(3-hydroxybutyrate-co-4-hydroxybutyrate)
Polymer, 1995Abstract 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 +2 more
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Enzymatic degradation of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) by commercial lipases
Polymer Degradation and Stability, 2012Abstract Polyhydroxyalkanoates (PHAs) are biocompatible and biodegradable polymers utilized in a wide range of applications. Among these applications, low-molecular-mass (LMW) PHAs are currently being applied in different studies such as amphiphilic block copolymer synthesis.
Alejandra Rodríguez-Contreras +2 more
openaire +1 more source
Effect of Oligo-Hydroxyalkanoates on Poly(3-Hydroxybutyrate-co-4-Hydroxybutyrate)-Based Systems
Macromolecular Materials and Engineering, 2015© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.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)).
Anna Meszynska +4 more
openaire +3 more sources
International Journal of Biological Macromolecules, 2017
This study reports the production of P(3HB-co-4HB) [Poly(3-hydroxybutyrate-co-4-hydroxybutyrate)] in possession of high molecular weight and elastomeric properties by Cupriavidus sp. USMAA1020 in single-stage mixed-substrate cultivation system. 1,4-butanediol and 1,6-hexanediol are found to be efficient substrate mixture that has resulted in high ...
Kai-Hee, Huong +2 more
openaire +2 more sources
This study reports the production of P(3HB-co-4HB) [Poly(3-hydroxybutyrate-co-4-hydroxybutyrate)] in possession of high molecular weight and elastomeric properties by Cupriavidus sp. USMAA1020 in single-stage mixed-substrate cultivation system. 1,4-butanediol and 1,6-hexanediol are found to be efficient substrate mixture that has resulted in high ...
Kai-Hee, Huong +2 more
openaire +2 more sources
International Journal of Biological Macromolecules, 1994
Comamonas acidovorans DS-17 was isolated from activated sludge and found to produce copolymers of 3-hydroxybutyrate (3HB) and 4-hydroxybutyrate (4HB) at 30 degrees C under growth-limited conditions. When 1,4-butanediol or 4-hydroxybutyric acid was used as the sole carbon source, a P(4HB) homopolymer was produced.
Y. Saito, Y. Doi
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Comamonas acidovorans DS-17 was isolated from activated sludge and found to produce copolymers of 3-hydroxybutyrate (3HB) and 4-hydroxybutyrate (4HB) at 30 degrees C under growth-limited conditions. When 1,4-butanediol or 4-hydroxybutyric acid was used as the sole carbon source, a P(4HB) homopolymer was produced.
Y. Saito, Y. Doi
openaire +2 more sources
Journal of Materials Science, 2010
Isothermal crystallization kinetics and morphology of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) [P(3HB-co-4HB)] with different 4-hydroxybutyrate (4HB) molar fraction were investigated by differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD), and polarized optical microscopy (POM).
Xiuping Lu, Xing Wen, Di Yang
openaire +1 more source
Isothermal crystallization kinetics and morphology of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) [P(3HB-co-4HB)] with different 4-hydroxybutyrate (4HB) molar fraction were investigated by differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD), and polarized optical microscopy (POM).
Xiuping Lu, Xing Wen, Di Yang
openaire +1 more source