Search results for "Resistència de materials"

showing 2 items of 2 documents

Cours de mécanique appliquée : profesée a l'École Imperiale des Ponts et Chaussées

v.1: Première partie. Résistance des matériaux et stabilité des constructions

HidràulicaResistència de materials
researchProduct

Dielectric Spectroscopy of Recycled Polylactide

2014

The effects of multiple mechanical recycling on amorphous polylactide (PLA) were simulated by means of five successive injection-grinding cycles. The influence of the induced thermo-mechanical degradation on the dielectric properties of PLA was analysed. The relaxation spectra were studied in terms of the complex dielectric permittivity (ε0 and ε00) and the dielectric loss tangent, tg(d) in the frequency range from 102 to 107 Hz over the temperature interval from 0 C to 140 C. It was possible to distinguish two relaxations zones, one at low temperatures and high frequencies (b relaxation) and another at higher temperatures and lower frequencies (a relaxation). The individual relaxations wer…

Materials sciencePolymers and PlasticsThermodynamicsDielectricConductivityThermo-mechanical degradationsymbols.namesakeSegmental dynamicsDynamic fragilityMaterials ChemistryPoly(lactide) (PLA)RecyclingComposite materialResistència de materialsArrhenius equationMolar massCondensed Matter PhysicsDielectric spectroscopyAmorphous solidMechanics of MaterialsMAQUINAS Y MOTORES TERMICOSsymbolsRelaxation (physics)Dielectric lossMATEMATICA APLICADADielectric thermal analysis (DETA)
researchProduct