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dc.contributor.authorGálvez, Jaime
dc.contributor.authorVera Mondragón, Bairo
dc.contributor.authorWagner, Elizabeth
dc.contributor.authorCorrea Aguirre, Juan Pablo
dc.contributor.authorHidalgo Salazar, Miguel Angel
dc.contributor.authorCaicedo, Carolina
dc.description.abstractOne of the critical processing parameters—the speed of the extrusion process for plasticized poly (lactic acid) (PLA)—was investigated in the presence of acetyl tributyl citrate (ATBC) as plasticizer. The mixtures were obtained by varying the content of plasticizer (ATBC, 10–30% by weight), using a twin screw extruder as a processing medium for which a temperature profile with peak was established that ended at 160 °C, two mixing zones and different screw rotation speeds (60 and 150 rpm). To evaluate the thermo-mechanical properties of the blend and hydrophilicity, the miscibility of the plasticizing and PLA matrix, Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), oscillatory rheological analysis, Dynamic Mechanical Analysis (DMA), mechanical analysis, as well as the contact angle were tested. The results derived from the oscillatory rheological analysis had a viscous behavior in the PLA samples with the presence of ATBC; the lower process speed promotes the transitions from viscous to elastic as well as higher values of loss modulus, storage modulus and complex viscosity, which means less loss of molecular weight and lower residual energy in the transition from the viscous state to the elastic state. The mechanical and thermal performance was optimized considering a greater capacity in the energy absorption and integration of the components.eng
dc.format.extent21 páginasspa
dc.publisherMultidisciplinary Digital Publishing Institute. MDPIeng
dc.subjectCitrato de acetil tributilospa
dc.titleEffect of extrusion screw speed and plasticizer proportions on the rheological, thermal, mechanical, morphological and superficial properties of PLAeng
dc.typeArtículo de revistaspa
dc.subject.armarcDinámica de fluidosspa
dc.subject.armarcÁngulo de contactospa
dc.subject.armarcFluid dynamicseng
dc.relation.citationeditionVolumen 12, número 9 (2020)spa
dc.relation.citationissueNúmero 9spa
dc.relation.citationvolumeVolumen 12spa
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dc.rights.creativecommonsAtribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0)spa
dc.subject.proposalAcetyl tributyl citrateeng
dc.subject.proposalPoly(lactic acid);eng
dc.subject.proposalDynamic mechanical analysiseng
dc.subject.proposalContact angleeng

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