Biodegradation study on poly(epsilon-caprolactone) with bimodal molecular weight distribution

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F12%3A00189966" target="_blank" >RIV/62156489:43210/12:00189966 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/app.38078" target="_blank" >http://dx.doi.org/10.1002/app.38078</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/app.38078" target="_blank" >10.1002/app.38078</a>

Result language
angličtina
Original language name
Biodegradation study on poly(epsilon-caprolactone) with bimodal molecular weight distribution
Original language description
Poly(epsilon-caprolactone) (PCL) of bimodal molecular weight distribution was exposed to the action of enzymes-lipases from Aspergillus oryzae in phosphate buffer at pH 7 and 37°C, and those produced in situ by Bacillus subtilis in nutrient medium at 30°C for 42 days. The occurrence of biodegradation is proved on the basis of the weight loss, decrease of molecular weight, carbonyl index, crystallinity, and development of cracks on the PCL surfaces. In the case of Bacillus subtilis, the degradation (10 wt % loss of PCL) proceeds faster in comparison with lipase from Aspergillus oryzae (2.6 wt % loss of PCL), where the degradation process seems to stop during 14 days of experiment. The gel permeation chromatography results reveal that preferential degradation of lower molecular portion did not occur but it is assumed that PCL chains were cleaved in accordance with particular degradation mechanism that depends significantly on biological agent.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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