Search results for "polyethers"

showing 4 items of 4 documents

High performance composites containing perfluoropolyethers-functionalized carbon-based nanoparticles: Rheological behavior and wettability

2016

Abstract Ultra High Molecular Weight Polyethylene (UHMWPE) based composites filled with carbon nanotubes (CNTs) and carbon black (CB) modified by perfluoropolyethers (PFPE) have been formulated. All composites show a segregated morphology with nanofillers selectively localized at the polymer particle–particle interface. The composites rheological properties have been deeply investigated: the PFPE functionalities linked on CNTs facilitate the semi-3D nanofillers network formation in the composites that show a solid-like behaviour even at lower investigated filler contents, reaching the rheological percolation threshold at lower nanofiller content than bare CNTs filled composites. For composi…

B. Rheological propertiePolymer-matrix composites (PMCs)Materials scienceNano-structures Polymer-matrix composites (PMCs) Rheological properties Surface properties Perfluoropolyethers nanofillersB. Surface propertiesNanoparticlechemistry.chemical_elementCeramics and Composite02 engineering and technologyCarbon nanotube010402 general chemistry01 natural sciencesPerfluoropolyethers nanofillersIndustrial and Manufacturing Engineeringlaw.inventionchemistry.chemical_compoundA. Polymer-matrix composites (PMCs)lawA. Nano-structures; A. Polymer-matrix composites (PMCs); B. Rheological properties; B. Surface properties; Perfluoropolyethers nanofillers; Ceramics and Composites; Mechanics of Materials; Mechanical Engineering; Industrial and Manufacturing EngineeringA. Nano-structuresSurface propertiesMechanics of MaterialRheological propertiesComposite materialPerfluoropolyethers nanofillerUltra-high-molecular-weight polyethylenechemistry.chemical_classificationMechanical EngineeringPercolation thresholdCarbon blackPolymer021001 nanoscience & nanotechnologyB. Surface propertie0104 chemical sciencesB. Rheological propertieschemistryNano-structuresMechanics of MaterialsA. Nano-structureCeramics and CompositesWetting0210 nano-technologyCarbon
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From an epoxide monomer toolkit to functional PEG copolymers with adjustable LCST behavior.

2011

The lower critical solution temperature (LCST) behavior of novel poly(ethylene glycol) (PEG)-based copolymers bearing multiple functional groups, obtained by anionic ring-opening (co)polymerization (AROP), has been investigated. Variable comonomer ratios of ethylene oxide (EO) and the corresponding oxiranes isopropylidene glyceryl glycidyl ether (IGG), ethoxyl vinyl glycidyl ether (EVGE), allyl glycidyl ether (AGE), or N,N-dibenzyl amino glycidyl (DBAG), particularly designed to implement functional groups at the PEG backbone, were found to influence the LCST behavior. Sharp transitions from translucent to opaque solutions, comparable to other well-established stimuli-responsive polymers, w…

Ethylene OxideMaterials scienceHot TemperaturePolymers and PlasticsPolymersAllyl glycidyl etherpolyethersEpoxideLower critical solution temperaturePolymerizationPolyethylene Glycolschemistry.chemical_compoundPolymer chemistrycopolymersMaterials ChemistryCopolymerPoly(Ethylene Glycol) CopolymersSide-ChainsAqueous-SolutionEthylene oxideComonomerstimuli-sensitiveOrganic ChemistryPegchemistryPolymerizationGlycidolLcstEthylene glycolHydrophobic and Hydrophilic InteractionsMacromolecular rapid communications
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Multifunctional Poly(ethylene glycol)s

2011

In the rapidly evolving multidisciplinary field of polymer therapeutics, tailored polymer structures represent the key constituent to explore and harvest the potential of bioactive macromolecular hybrid structures. In light of the recent developments for anticancer drug conjugates, multifunctional polymers are becoming ever more relevant as drug carriers. However, the potentially best suited polymer, poly(ethylene glycol) (PEG), is unfavorable owing to its limited functionality. Therefore, multifunctional linear copolymers (mf-PEGs) based on ethylene oxide (EO) and appropriate epoxide comonomers are attracting increased attention. Precisely engineered via living anionic polymerization and d…

LymphomapolyethersNanotechnologyAntineoplastic AgentsPolyethylene glycolMolecular-WeightCatalysisPolyethylene Glycolschemistry.chemical_compoundepoxidesCopolymerOrganic chemistryAnimalsLiving anionic polymerizationchemistry.chemical_classificationWeight Hyperbranched PolyglycerolsDrug CarriersDrug-Delivery SystemsEthylene oxidepoly(ethylene glycol)Ethylene-OxideGene Transfer TechniquesPolymer TherapeuticsGeneral ChemistryPolymermultivalencybioconjugatesPendant Amino-GroupsPolyethylene-GlycolchemistryPolymerizationAnionic Peg DerivativesDoxorubicinBlock-CopolymersCisplatinIn-VivoDrug carrierPeptidesEthylene glycol
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Flexible Perfluoropolyethers-Functionalized CNTs-Based UHMWPE Composites: A Study on Hydrogen Evolution, Conductivity and Thermal Stability

2022

Flexible conductive composites based on ultra-high molecular weight polyethylene (UHMWPE) filled with multi-walled carbon nanotubes (CNTs) modified by perfluoropolyethers (PFPEs) were produced. The bonding of PFPE chains, added in 1:1 and 2:1 weight ratios, on CNTs influences the dispersion of nanotubes in the UHMWPE matrix due to the non-polar nature of the polymer, facilitating the formation of nanofillers-rich conductive pathways and improving composites’ electrical conductivity (two to five orders of magnitude more) in comparison to UHMWPE-based nanocomposites obtained with pristine CNTs. Electrochemical atomic force microscopy (EC-AFM) was used to evaluate the morphological changes dur…

flexible electrode functionalized CNTs hydrogen evolution perfluoropolyethers UHMWPE compositesUHMWPE compositesperfluoropolyethersflexible electrodehydrogen evolutionfunctionalized CNTsSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiGeneral Materials ScienceUHMWPE composites; functionalized CNTs; perfluoropolyethers; flexible electrode; hydrogen evolutionMaterials; Volume 15; Issue 19; Pages: 6883
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