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RESEARCH PRODUCT
Thermal analysis applied to the characterization of degradation in soil of polylactide: I. Calorimetric and viscoelastic analyses
Amparo Ribes-greusL. Santonja-blascoJosé David BadiaRosana Morianasubject
Degradation in soilMaterials sciencePolymers and PlasticsSoil testPopulationDifferential scanning calorimetrySoil retrogression and degradationMaterials ChemistryComposite materialeducationThermal analysiseducation.field_of_studyLamellar thickness distributionMaterials compostosDynamic-Mechanical-Thermal Analysis (DMTA)TermoplàsticsDynamic mechanical analysisCondensed Matter PhysicsPolylactide (PLA)Mechanics of MaterialsMAQUINAS Y MOTORES TERMICOSSoil waterDegradation (geology)Differential Scanning Calorimetry (DSC)Free volumedescription
[EN] An accelerated soil burial test has been performed on a commercial polylactide (PLA) for simulating non-controlled disposal. Degradation in soil promotes physical and chemical changes in polylactide properties, which can be characterized by Thermal Analysis techniques. Physical changes occurred in polylactide due to the degradation in soil were evaluated by correlating their calorimetric and visco-elastic properties. It is highly remarkable that each calorimetric scan offers specific and enlightening information. Degradation in soil affects the polylactide chains reorganization. A multimodal melting behavior is observed for buried PLA, degradation in soil also promotes the enlarging the lamellar thickness distribution of the population with bigger average size. Morphological changes due to degradation in soil lead to an increase in the free volume of the polylactide chains in the amorphous phase that highly affected the bulk properties. Thermal Analysis techniques provide reliable indicators of the degradation stage of polylactide induced by degradation in soil, as corroborated by molecular weight analysis. (C) 2010 Elsevier Ltd. All rights reserved.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-11-01 | Polymer Degradation and Stability |