Hygrothermal ageing of reprocessed polylactide
NAGIOS: RODERIC FUNCIONANDO

Hygrothermal ageing of reprocessed polylactide

DSpace Repository

Hygrothermal ageing of reprocessed polylactide

Show simple item record

dc.contributor.author Badia Valiente, José David
dc.contributor.author Santonja-Blasco, L.
dc.contributor.author Martínez-Felipe, A.
dc.contributor.author Ribes Greus, A.
dc.date.accessioned 2019-10-21T13:43:59Z
dc.date.available 2019-10-21T13:43:59Z
dc.date.issued 2012
dc.identifier.uri https://hdl.handle.net/10550/71779
dc.description.abstract The influence of an accelerated hygrothermal ageing simulation test on a commercial PLA and its three subsequent mechanically-reprocessed materials was studied. The analysis was focused on the water diffusion kinetics and the physico-chemical changes induced by the hygrothermal degradation. Water diffusion proceeded faster than chain relaxation processes, as defined by a Case II absorption model. It was proved that the water diffusion rate decreased with subsequent reprocessing cycles and increased with higher hygrothermal ageing temperatures. Hydrolytic chain scission provoked significant molar mass decays and consequent general losses of thermal and mechanical performance. The rearrangement into crystalline fractions of shorter chains provoked by hygrothermal ageing was qualitatively and quantitatively followed by both Fourier-Transform Infrared Spectroscopy and Differential Scanning Calorimetry. The microstructural changes were monitored by the cold-crystallization temperature, the crystallinity degree XC and the absorbance intensity ratio I921/I955. A Weibull model showed that the crystallites were formed faster at higher reprocessing cycles and at lower hygrothermal ageing temperatures. All these effects were particularly significant for PLA reprocessed more than one time.
dc.language.iso eng
dc.relation.ispartof Polymer Degradation and Stability, 2012, vol. 97, num. 10, p. 1881-1890
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Badia Valiente, José David Santonja-Blasco, L. Martínez-Felipe, A. Ribes Greus, A. 2012 Hygrothermal ageing of reprocessed polylactide Polymer Degradation and Stability 97 10 1881 1890
dc.subject Solucions polimèriques
dc.subject Termoplàstics
dc.title Hygrothermal ageing of reprocessed polylactide
dc.type info:eu-repo/semantics/article
dc.date.updated 2019-10-21T13:43:59Z
dc.identifier.doi https://doi.org/10.1016/j.polymdegradstab.2012.06.001
dc.identifier.idgrec 134917

View       (1.035Mb)

This item appears in the following Collection(s)

Show simple item record

Search DSpace

Advanced Search

Browse

Statistics