0000000000147361

AUTHOR

Victor Costa

showing 4 related works from this author

Transparent thermoplastic polyurethanes based on aliphatic diisocyanates and polycarbonate diol

2016

Segmented thermoplastic polyurethanes (PUs) were synthetized using polycarbonate diol as soft segment with a molar mass of 500 and as a hard segment 1,5-pentanediol with a combination of isophorone diisocyanate (IPDI) and hexamethylene diisocyanate (HDI). Differential scanning calorimetry, differential mechanical analysis, Fourier transform infrared-attenuated total reflection spectroscopy, haze, transmittance, hardness, tensile properties and retention of tensile properties tests were employed to characterize the different PUs. The results of this study show that IPDI/HDI relation has a significant impact on the phase mixing, crystallinity and therefore on the PU’s properties. The variati…

chemistry.chemical_classificationMaterials scienceMolar massThermoplasticPolymers and PlasticsDiol02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences0104 chemical scienceschemistry.chemical_compoundCrystallinityDifferential scanning calorimetrychemistryvisual_artMaterials Chemistryvisual_art.visual_art_mediumHexamethylene diisocyanateComposite materialPolycarbonateIsophorone diisocyanate0210 nano-technologyJournal of Elastomers & Plastics
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Tunable Structure and Properties of Segmented Thermoplastic Polyurethanes as a Function of Flexible Segment

2019

Segmented thermoplastic polyurethanes (PUs) were synthetized using macrodiols with different functional groups (carbonate, ester, and /or ether) as a segment with a molar mass of 1000 and 2000 g/mol, and 4,4&rsquo

ThermoplasticMaterials scienceSolucions polimèriquesPolymers and PlasticsMiscibilityArticlelcsh:QD241-441Thermoplastic polyurethaneDifferential scanning calorimetrylcsh:Organic chemistryUltimate tensile strengthmechanical and thermal properties.Shore durometermechanical and thermal propertiesPolycarbonateComposite materialdegradationchemistry.chemical_classificationTermoplàsticsGeneral ChemistryDynamic mechanical analysisCiència dels materialsthermoplastic polyurethanechemistryvisual_artvisual_art.visual_art_mediumflexible segmentphase segregationPolymers
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Enhanced polyurethanes based on different polycarbonatediols

2012

Segmented thermoplastic polyurethanes (PUs) were prepared from 4,4′-diphenylmethane diisocyanate (MDI), 1,4-butanediol (BD) and different macrodiols with a molar mass of 1000. Properties of those PUs based on polycarbonatediol (PCD) were compared with their homologous based on polyesterdiol and polyetherdiol as macrodiols. The proportion used in this study was macrodiol:BD:MDI = 1:2:3, in mole ratio. The hard segment weight percentage is 48 wt% for different PUs. Thermogravimetric analysis, differential scanning calorimetry, differential mechanical analysis, Fourier transform infrared-attenuated total reflection spectroscopy, as well as mechanical properties and retention on flexural prope…

chemistry.chemical_classificationchemistry.chemical_compoundThermoplasticMaterials scienceMolar massPolymers and PlasticschemistryMaterials ChemistryComposite materialPolyurethaneJournal of Elastomers & Plastics
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Structure-property relationships of polycarbonate diol-based polyurethanes as a function of soft segment content and molar mass

2014

Segmented thermoplastic polyurethanes (PUs) have been synthesized with polycarbonate diol as soft segment and 4,4′-diphenylmethane diisocyanate and butanediol as hard segment. Two different series employing two different soft-segment molar mass, 1000 and 2000 g/mol, and by changing the hard-segment content from 32 to 67% have been investigated with the aim to elucidate the effect of the different content variations on the properties. Morphological, thermal, and mechanical properties have been studied by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), wide angle X-ray diffraction, atomic force microscopy, tensile and…

Tear resistanceMolar massMaterials sciencePolymers and PlasticsGeneral ChemistryDynamic mechanical analysisMiscibilitySurfaces Coatings and FilmsCrystallinityDifferential scanning calorimetryvisual_artUltimate tensile strengthMaterials Chemistryvisual_art.visual_art_mediumPolycarbonateComposite materialJournal of Applied Polymer Science
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