نتایج جستجو برای: polymer nanocomposites pncs
تعداد نتایج: 105313 فیلتر نتایج به سال:
Tryck: Universitetsservice US AB Frontpage: Photograph of the MCB and its internal components, (a, b, c) recorded images of the electric arc at different times. (Courtesy of ABB, www.abb.com.) iii "Keep going even when there are obstacles." v PREFACE This thesis is submitted as a compilation of scientific papers for fulfilling the requirements of the doctoral thesis (PhD) in the physics departm...
This paper discusses about preparation of biodegradable polymer /clay nanocomposites based on organically modified montmorillonite clay; i.e. cloisite 10A and biodegradable polymer chitosan by solution mixing technique and their characterization. The nanocomposites were successfully prepared and their structures were characterized by powder x-ray diffraction (XRD), particle size analyzer (Beckm...
In recent months, many scientists and engineers have tried to minimize control coronavirus spreading by different techniques. These techniques usually focused on cutting the circlet of Covid-19 infection both direct non-direct ways. As a polymer composites widely used in everyday products, short review Polymer Nano-Composites (PNCs) for antiviral activity against has been achieved. Firstly, vir...
iron oxide, [ 10 ] zinc oxide, [ 11 ] cadmium selenide, [ 12 ] gold [ 13 ] and others in nanocomposites is a promising approach to introduce new functionalities to a polymer such as tunable refractive index, magnetism, surface hardness, UV absorption, etc. However, aggregation of nanoparticles is commonly encountered, leading to unsatisfactory performance of nanocomposites and frustrating effor...
In this theoretical research work, the fracture characteristics of graphene-modified polymer nanocomposites were studied. A three-dimensional representative volume element-based multiscale model was developed in a finite element environment. Graphene sheets were modeled in an atomistic state, whereas the polymer matrix was modeled as a continuum. Van der Waals interactions between the matrix an...
Motivated by recent experiments, we examine within a percolation model whether there is a quantitative equivalence in the glass transition temperatures of polymer thin films and polymer nanocomposites. Our results indicate that, while the qualitative behaviors of these systems are similar, a quantitative equivalence cannot be established in general. However, we propose a phenomenological scalin...
o bjectives: this study aimed to compare a number of new nanocomposites capable of pro- tecting the jaw from ionizing radiation. mat erials and methods: four different types of nano-powders [ti, zr (iv) oxide, ag and co] were mixed in a polymer matrix to create nano-composites with doping values of 8% in weight. small-angle x-ray scattering (saxs) analysis was performed using a hecus- saxs syst...
Articles you may be interested in Broadband saturable absorption and optical limiting in graphene-polymer composites Appl. Microwave and mechanical properties of quartz/graphene-based polymer nanocomposites Appl. Enhanced dielectric properties of BaTiO3/poly(vinylidene fluoride) nanocomposites for energy storage applications J. The importance of bendability in the percolation behavior of carbon...
A methodology for simple multiscale modeling of mechanical properties of polymer nanocomposites has been developed. This methodology consists of three steps: (1) obtaining from molecular dynamics simulations the viscoelastic properties of the bulklike polymer and approximating the position-dependent shear modulus of the interfacial polymer on the basis of the polymer-bead mean-square displaceme...
Nanocomposites made up of polymer matrices and carbon nanotubes are a class of advanced materials with great application potential in electronics packaging. Nanocomposites with carbon nanotubes as fillers have been designed with the aim of exploiting the high thermal, electrical and mechanical properties characteristic of carbon nanotubes. Heat dissipation in electronic devices requires interfa...
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