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Effect of the elongation rate on the biodegradation of oriented polycaprolactone films by a pure strain of micro-organisms isolated from an industrial compost for house-hold refuse

par Lefevre, C.;David, Christiane ;Villers, Didier
Référence Macromolecular chemistry and physics, 200, 6, page (1374-1379)
Publication Publié, 1999-06

Article révisé par les pairs

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Résumé :

It has been demonstrated that unidirectional orientation of semi-crystalline polycaprolactone (PCL) films strongly affects their degradation behaviour in the presence of micro-organisms. For films of the same final thickness (300 μm), elongated using strain rates between 1.6 and 0.02 min-1, the rate of oxygen consumption is similar for all samples during the first 200 h of degradation. After that time the rate becomes strongly dependent on the elongation conditions. After 700 h of incubation, the weight loss is 99 and 25% for samples obtained with strain rates of 1.6 and 0.02 min-1 respectively. When compared with the non-orientated sample, the 1.6 min-1 sample degrades faster while the others degrade more slowly. The results are discussed in terms of models proposed in the literature for oriented films. © Wiley-VCH Verlag GmbH, 1999.