Thermoreversible gelation of biodegradable polyester (PHBV) in toluene

In present paper we investigate thermoreversible gelation of biodegradable polyester poly (3-hydroxybutyrate- co-3-hydroxyvalerate) (PHBV) in toluene. Hot PHBV solutions became transparent gels after cooling to room temperature. This physical gelation process was followed by light scattering and vis...

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Bibliographic Details
Published in:Polymer (Guilford) 2006-01, Vol.47 (2), p.553-560
Main Authors: Pich, Andrij, Schiemenz, Nadine, Boyko, Volodymyr, Adler, Hans-Juergen P.
Format: Article
Language:English
Subjects:
Applied sciences
Biodegradable polymer films
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
Thermoreversible gelation
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Summary:In present paper we investigate thermoreversible gelation of biodegradable polyester poly (3-hydroxybutyrate- co-3-hydroxyvalerate) (PHBV) in toluene. Hot PHBV solutions became transparent gels after cooling to room temperature. This physical gelation process was followed by light scattering and viscosity measurements for solutions of different PHBV concentrations. It has been found that gelation temperature increases with increasing polymer concentration in toluene. PHBV films have been prepared by gelation process followed by solvent removal on solid substrates. It has been demonstrated that PHBV concentration in the solution influences the surface morphology of obtained films. Homogeneous PHBV films with increased surface roughness can be obtained by means of developed technique. Hydrolytic degradation studies indicate that surface morphology of obtained PHBV layers changes considerably with degradation time.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2005.11.070