Biodegradation study on polycaprolactone with bimodal molecular weight distribution

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F12%3APU99253" target="_blank" >RIV/00216305:26310/12:PU99253 - isvavai.cz</a>
Result on the web
<a href="http://onlinelibrary.wiley.com/doi/10.1002/app.38078/abstract" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1002/app.38078/abstract</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Biodegradation study on polycaprolactone with bimodal molecular weight distribution
Original language description
Polycaprolactone (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 degree Celsius, and those produced in situ by Bacillus subtilis in nutrient medium at30 degree Celsius 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 wit 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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Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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