The role of nanofillers on the degradation behavior of polylactic acid

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dc.contributor.author Kontou, E en
dc.contributor.author Georgiopoulos, P en
dc.contributor.author Niaounakis, M en
dc.date.accessioned 2014-03-01T02:14:50Z
dc.date.available 2014-03-01T02:14:50Z
dc.date.issued 2012 en
dc.identifier.issn 02728397 en
dc.identifier.uri http://hdl.handle.net/123456789/30137
dc.subject.other Aging behavior en
dc.subject.other Amorphous regions en
dc.subject.other Degradation behavior en
dc.subject.other Degradation effect en
dc.subject.other Environmental conditions en
dc.subject.other Experimental techniques en
dc.subject.other Exposure-time en
dc.subject.other Nano-fillers en
dc.subject.other Nano-sized fillers en
dc.subject.other Nanofiller en
dc.subject.other Poly lactic acid en
dc.subject.other Reverse effects en
dc.subject.other Strain at break en
dc.subject.other Weight fractions en
dc.subject.other Young's Modulus en
dc.subject.other Clay minerals en
dc.subject.other Degradation en
dc.subject.other Differential scanning calorimetry en
dc.subject.other Dynamic analysis en
dc.subject.other Dynamic mechanical analysis en
dc.subject.other Scanning electron microscopy en
dc.subject.other Silica en
dc.subject.other Stress-strain curves en
dc.subject.other Tensile testing en
dc.subject.other Yield stress en
dc.subject.other Nanocomposites en
dc.title The role of nanofillers on the degradation behavior of polylactic acid en
heal.type journalArticle en
heal.identifier.primary 10.1002/pc.21258 en
heal.identifier.secondary http://dx.doi.org/10.1002/pc.21258 en
heal.publicationDate 2012 en
heal.abstract This study examines the effect of type and content of various nanofillers on the aging behavior of polylactic acid (PLA)/nanocomposites compared with that of pristine PLA, under specific environmental conditions, namely 80% relative humidity, 40°C temperature, and exposure time up to 6 months. Two different types of nanosized fillers (silica and montmorillonite, MMT) at three different weight fractions as well their mixtures were used for this purpose. The role of the various nanofillers on the aging of pristine PLA and its nanocomposites was investigated in terms of several experimental techniques including Scanning Electron Microscopy (SEM), Differential Scanning Calorimetry (DSC), Dynamic Mechanical Analysis (DMA), and tensile testing. All studied samples, except those of PLA/MMT/Si nanocomposites, exhibited the same trend in properties during aging. In particular, no significant changes are noted after 1 month of aging. The materials after 3 months of aging experienced a dramatic lowering of the stress-strain curve, whereas at 6 months a reverse effect was observed. Comparing the effect of nanofiller types on the degradation, one could conclude that PLA/MMT nanocomposites exhibit a more homogeneous degradation effect, having a higher impact on yield stress in comparison with silica. In contrast, silica has a greater effect in Young's modulus and strain at break, compared with MMT. The peculiar behavior of the PLA/MMT/Si nanocomposites during aging is explained by the hindering action of the mixture of the two nanofillers on the molecular reordering of the PLA chains in the amorphous region. POLYM. COMPOS., 2012. © 2011 Society of Plastics Engineers. en
heal.journalName Polymer Composites en
dc.identifier.doi 10.1002/pc.21258 en
dc.identifier.volume 33 en
dc.identifier.issue 2 en
dc.identifier.spage 282 en
dc.identifier.epage 294 en

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