Correlation between the activation energy of PLA respectively PLA/starch composites and mechanical properties with regard to differ accelerated aging conditions

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dc.date.accessioned2024-05-31T15:28:08Z
dc.date.available2024-05-31T15:28:08Z
dc.date.issued2024-02-22
dc.description.sponsorshipGefördert im Rahmen des Projekts DEALger
dc.description.sponsorshipBundesministerium für Ernährung und Landwirtschaft, Fachagentur Nachwachsende Rohstoffe e.V. (FNR). Grant Number: 2220NR089Eger
dc.identifierdoi:10.17170/kobra-2024052810231
dc.identifier.urihttp://hdl.handle.net/123456789/15799
dc.language.isoeng
dc.relation.doidoi:10.1002/bip.23571
dc.relation.projectidGrant Number: 2220NR089E
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectactivation energyeng
dc.subjectFlynn-Wall-Ozawaeng
dc.subjectnative potato starcheng
dc.subjectpolylactideeng
dc.subjectresistanceeng
dc.subjectthermal degradationeng
dc.subjectthermogravimetric analysis (TGA)eng
dc.subject.ddc500
dc.subject.ddc600
dc.subject.ddc660
dc.subject.swdAktivierungsenergieger
dc.subject.swdKartoffelstärkeger
dc.subject.swdPolymilchsäureger
dc.subject.swdTemperaturverhaltenger
dc.subject.swdDegradation <Technik>ger
dc.subject.swdThermomechanische Eigenschaftger
dc.titleCorrelation between the activation energy of PLA respectively PLA/starch composites and mechanical properties with regard to differ accelerated aging conditionseng
dc.typeAufsatz
dc.type.versionpublishedVersion
dcterms.abstractWithin this research semi-crystalline polylactide and composites with 50 wt.% native potato starch were compounded and injection molded. The material was mechanically characterized by tensile, three-point bending, and Charpy impact tests. These tests were carried out in the freshly molded state and after 332 and 792 h of storage at accelerated temperature or humidity. The respective activation energy was calculated by applying the Flynn-Wall-Ozawa method. The focus of the study was to investigate the correlation between the activation energy and the related mechanical and thermal properties. The results showed that the addition of native potato starch as a filler prevents the decrease in activation energy over the course of the experiments. Thus, the PLA/starch composite is more resistant to the two aging conditions than the pure PLA. When considering the mechanical properties, the pure PLA showed a large deviation of results compared to the initial value in a range of +63.88% to −33.96% with regard to the respective aging conditions, whereas the PLA/starch composite properties nearly always remained at the initial values. Through the investigation of the mechanical and thermal properties, it was shown that the steady activation energies are consistent with the mechanical properties, as these have shown only a small deviation of the mechanical properties during the duration of experiments for the PLA/starch composite.eng
dcterms.accessRightsopen access
dcterms.creatorReit, Margarita
dcterms.creatorZarges, Jan-Christoph
dcterms.creatorHeim, Hans-Peter
dcterms.source.articlenumbere23571
dcterms.source.identifiereissn:1097-0282
dcterms.source.issueIssue 3
dcterms.source.journalBiopolymerseng
dcterms.source.volumeVolume 115
kup.iskupfalse

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