A5000843919- Polymer Nanocomposites and Properties
- Silicone and Siloxane Chemistry
- biodegradable polymer synthesis and properties
- Polymer composites and self-healing
- Polymer crystallization and properties
- Carbon Nanotubes in Composites
- Dielectric materials and actuators
- Material Dynamics and Properties
- Marine Biology and Environmental Chemistry
- Anodic Oxide Films and Nanostructures
- Natural Fiber Reinforced Composites
- Electromagnetic wave absorption materials
- Advanced Surface Polishing Techniques
- Thermal properties of materials
- Synthesis and characterization of novel inorganic/organometallic compounds
- Tribology and Wear Analysis
- Luminescence and Fluorescent Materials
- Polymer Nanocomposite Synthesis and Irradiation
- Nanotechnology research and applications
- Liquid Crystal Research Advancements
- Bone Tissue Engineering Materials
- Additive Manufacturing and 3D Printing Technologies
- Metal and Thin Film Mechanics
- Smart Materials for Construction
National Technical University of Athens
2013-2020
Octa-OH-functional POSS has been incorporated into a model polyurethane elastomer as comparatively massive and notionally "robust" 3-dimensional cross-linking core. The effects of this moiety on the morphology molecular dynamics system are studied over range size time scales. Microscopy, scattering, spectroscopic, thermal, dielectric techniques, in agreement with each other, show that covalent inclusion particles restricts microphase separation, inhibits formation hard-block domains,...
We report molecular dynamics in the rigid amorphous fraction (RAF) of polymer bound at interfaces with nanoparticles nanocomposites and calculate glass transition temperature, Tg, for this layer polymer. follow '3-phase-model' semicrystalline polymers where matrix consists crystalline (CF), mobile (MAF) RAF. While by crystallites is completely rigid, neither contributing to transition, nor displaying dynamics, filler displays decelerated as compared bulk Reports literature suggest a...
Polyhedral oligomeric silsesquioxane moieties with poly(ethylene glycol) groups attached on the cage (PEG–POSS) were blended an elastomeric polyurethane matrix, in contents up to 10 wt %. Several experimental techniques agreement each other show that PEG–POSS disperse well molecular level and act as diluents plasticizing dynamics. Although degree of microphase separation is only weakly affected all compositions, changes macromorphology related POSS have impact matrix properties, decreasing...
Thermoplastic nanocomposites were fabricated in order to deliver a suitable material for thermal management devices, commonly processed by injection molding or 3D printing. Scalable manufacturing of Carbon Nanotubes (CNTs) and multi-functional polymers with good conductivity ease handling was demonstrated the present study. The standard grade polyethylene reinforced CNTs, formed melt mixing. Polyethylene glycol used concentrating CNTs masterbatch its plasticizing properties, ensuring safe...
The effect of poly(ethylene oxide) (PEO) soft segment molecular weight (<italic>M</italic><sub>n</sub>= 2000, 4600, 8000 g mol<sup>−1</sup>) mobility and segmental dynamics a series polyurethane–urea copolymers (PU) was investigated by dielectric relaxation spectroscopy.
ABSTRACT Nanocomposites based on sequential semi‐interpenetrating polymer network (semi‐IPN) of cross‐linked polyurethane and linear poly(2‐hydroxyethyl methacrylate) with 0.25 3 wt % nanosilica filler were prepared investigated. The unmodified silica, carboxyl‐modified, amino‐modified silica used in an attempt to control the microphase separation matrix by polymer–filler interactions. A variety experimental techniques study morphology, thermal transitions, mechanical properties, dynamics...
In the present work, thermomechanical performance of linear low‐density polyethylene (LDPE) reinforced with multi‐walled carbon nanotubes (CNTs) is investigated by means scanning electron microscopy, differential calorimetry, dynamic mechanical analysis, tensile and electrical testing. The ball milling melt mixing procedure, employed for nanocomposites preparation provided improvement properties. findings are encouraging a wider application LDPE. nanocomposites’ elastic behaviour was further...
In this work, we report on the thermal and thermomechanical properties of rigid PU foams modified with POSS moieties, paying special attention to molecular dynamics these systems. 1,2-Propanediolisobutyl (PHI-POSS) are used as pendent groups octa(3-hydroxy-3-methylbutyldimethylsiloxy) (OCTA-POSS) serve chemical crosslinks. DSC reveals an initial slowing down segmental for small loadings (5 wt%) both followed by acceleration, probably due changes in topology network morphology foam. A...
Molecular dynamics and liquid crystalline (LC) transitions in nanocomposites with main‐chain alkylene–aromatic polyester as a matrix fullerene C 60 filler, filler content varying from 0.3 up to 5 wt% were studied. Measurements by differential scanning calorimetry (DSC) temperature modulated DSC techniques performed order study glass transition LC transitions. Dielectric relaxation spectroscopy (DRS) was used both record through isochronal measurements at four different frequencies during...