Novel aspects of the degradation process of PLA based bulky samples under conditions of high partial pressure of water vapour

Kucharczyk, Pavel; Hnátková, Eva; Dvořák, Zdeněk; Sedlařík, Vladimír

dc.title	Novel aspects of the degradation process of PLA based bulky samples under conditions of high partial pressure of water vapour	en
dc.contributor.author	Kucharczyk, Pavel
dc.contributor.author	Hnátková, Eva
dc.contributor.author	Dvořák, Zdeněk
dc.contributor.author	Sedlařík, Vladimír
dc.relation.ispartof	Polymer Degradation and Stability
dc.identifier.issn	0141-3910 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued	2013
utb.relation.volume	98
utb.relation.issue	1
dc.citation.spage	150
dc.citation.epage	157
dc.type	article
dc.language.iso	en
dc.publisher	Elsevier, Ltd.	en
dc.identifier.doi	10.1016/j.polymdegradstab.2012.10.016
dc.relation.uri	https://www.sciencedirect.com/science/article/pii/S0141391012003990
dc.subject	Hydrolytic degradation	en
dc.subject	Molecular weight	en
dc.subject	Morphology	en
dc.subject	Poly(l-lactic acid)	en
dc.subject	Thermal properties	en
dc.description.abstract	This work describes differences between the degradation of poly(l-lactic acid) bulky samples in high partial pressure of a water vapour environment versus a buffered liquid medium. Analytical techniques (optical and electron microscopy, size exclusion chromatography, differential scanning calorimetry) were used to evaluate the material's morphology, molecular weight, crystallinity and thermal properties. In particular, the extent of degradation was studied separately in the core and surface of the testing specimens. The results reveal significant differences in the bulk degradation profiles and morphological changes for both environments. Degradation in the liquid medium leads to multiphase core-cortex morphology formation, while the environment with high partial pressure of water vapour provides homogeneous-like bulk degradation of the samples due to significantly different diffusion conditions on the liquid-polymer and water vapour saturated air-polymer interface. © 2012 Elsevier Ltd. All rights reserved.	en
utb.faculty	Faculty of Technology
dc.identifier.uri	http://hdl.handle.net/10563/1003081
utb.identifier.obdid	43869892
utb.identifier.scopus	2-s2.0-84871918372
utb.identifier.wok	000315171000019
utb.identifier.coden	PDSTD
utb.source	j-scopus
dc.date.accessioned	2013-01-17T00:00:56Z
dc.date.available	2013-01-17T00:00:56Z
utb.contributor.internalauthor	Kucharczyk, Pavel
utb.contributor.internalauthor	Hnátková, Eva
utb.contributor.internalauthor	Dvořák, Zdeněk
utb.contributor.internalauthor	Sedlařík, Vladimír
utb.fulltext.affiliation	Pavel Kucharczyk a,b , Eva Hnatkova c , ZdenekDvorak a,c , Vladimir Sedlarik a,b,* a Centre of Polymer Systems, Tomas Bata University in Zlin, Nam. T.G. Masaryka 5555, 760 01 Zlin, Czech Republic b Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, Nam. T.G. Masaryka 275, 76272 Zlín, Czech Republic c Department of Production Engineering, Faculty of Technology, Tomas Bata University in Zlin, Nam. T.G. Masaryka 275, 76272 Zlín, Czech Republic
utb.fulltext.dates	Received 30 July 2012 Received in revised form 3 October 2012 Accepted 18 October 2012 Available online 29 October 2012
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utb.fulltext.sponsorship	This work was supported by the Ministry of Education, Youth and Sports of the Czech Republic (project ME09072) and Operational Programme Research and Development for Innovations co-funded by the European Regional Development Fund (project CZ.1.05/2.1.00/03.0111). The authors are also grateful to the Internal Grant Agency of Tomas Bata University in Zlin (grant IGA/FT/2012/005) for co-funding.
utb.fulltext.projects	MSM ME09072
utb.fulltext.projects	CZ.1.05/2.1.00/03.0111
utb.fulltext.projects	IGA/FT/2012/005