Abiotic aging of water- soluble 3- hydroxybutyric acid oligomers as monitored by capillary zone electrophoresis |
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Authors: | Audrey Athlan Christian Braud Michel Vert |
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Institution: | (1) CRBA-URA CNRS 1465, Faculté de Pharmacie, Université de Montpellier 1, France;(2) Faculté de Phar-macie, 15 avenue Charles Flahault, 34060 Montpellier, France |
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Abstract: | Oligomers of poly(3-hydroxybutyric acid) (P(3-HB)) were prepared by partial degradation of high molecular weight P(3-HB) dissolved
in 1,2-dichloroethane/water mixture in the presence of p-toluene sulfonic acid (p-TSA). The water-soluble fraction of the
resulting oligomers was extracted from the mixture with neutral sodium phosphate buffer. Capillary zone electrophoresis showed
that the aqueous extracts were composed of two series of oligomers. The first one was composed of one to seven P(3-HB) oligomers
(O(3-HB)). In contrast, the second series was composed of four oligomers characterized by the presence of a terminal C=C bond
O’(3-HB)]. Both series of oligomers behaved differently insofar as their fate in aqueous medium was concerned. The 0(3-HB)
compounds were stable over a period of 2 months. On the other hand, the population of the O’(3-HB) oligomers varied, the proportion
of oligomers increasing with aging time. |
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Keywords: | Capillary zone electrophoresis poly(3-hydroxybutyric acid) oligomers water solubility stability degradation |
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