Search results for " Polyamides"

showing 2 items of 2 documents

Polyamide-Based Fibers Containing Microwave-Exfoliated Graphite Nanoplatelets

2016

Exfoliated Graphite NanoPlatelets (GNP) have been obtained from Graphite Intercalation Compounds (GIC) subjected to thermal and microwave treatments. Accurate morphological and structural characterization of obtained GNP, performed to compare the degree of exfoliation, show that microwave-treated GNP, exhibit well-exfoliated structure, without any reduction in dimensions compared with the native GIC, differently to the thermal-treated ones. Microwave-treated GNP have been introduced in polyamide (PA) through melt-mixing to obtain nanocomposite that has been subjected to elongational flow, with the aim to improve the nanofiller dispersion and induce GNP orientation along the fiber direction.…

Electron energy loss spectroscopy (EELS); Fibers; Nanoparticles; Polyamides; Transmission Electron Microscopy; Chemical Engineering (all); Organic Chemistry; Polymers and PlasticsMaterials sciencePolymers and PlasticsGeneral Chemical EngineeringIntercalation (chemistry)NanoparticlePolyamides02 engineering and technologyElectron energy loss spectroscopy (EELS)010402 general chemistry01 natural sciencesNanoparticlePhase (matter)Chemical Engineering (all)GraphiteFiberFiberComposite materialSettore CHIM/02 - Chimica FisicaNanocompositeOrganic Chemistry021001 nanoscience & nanotechnologyExfoliation joint0104 chemical sciencesElectron energy loss spectroscopy (EELS) Fibers Nanoparticles Polyamides Transmission Electron MicroscopyFibersSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiPolyamidePolyamideNanoparticlesTransmission Electron Microscopy0210 nano-technology
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New phosphazene-based chain extenders containing allyl and epoxide groups

2003

In this paper we present the synthesis and the characterization of cyclophosphazenes substituted with allyl groups, their transformation in epoxide-containing cyclophosphazenes and the final utilization of these compounds as chain extenders in combination with polyamides. The reaction at high temperature of Nylon-6 with epoxy-functionalized cyclophosphazenes leads to the opening of the epoxy units by the action of both amino (--NH2) and carboxylic (--COOH) end-groups of the polymer to enhance the final molecular weight of this material. The consequences of this fact on the thermal, mechanical and visco-elastic properties of treated Nylon-6 have been also evaluated and compared to those of t…

Polymers and PlasticsGeneral Chemical EngineeringEpoxidechemistry.chemical_compoundPolymer chemistryMaterials ChemistryOrganic chemistryThermal stabilityPhosphazenechemistry.chemical_classificationchain extensionpolyamideGeneral ChemistryEpoxyPolymerNMREnd-groupSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiNylon 6chemistryvisual_artPolyamidecyclophosphazeneNylon-6; cyclophosphazenes; chain extension; polyamides; NMR.visual_art.visual_art_mediumnylon-6Designed Monomers and Polymers
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