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Effect of Wax and Polystyrene Emulsion on Water Absorption and Mechanical Properties of Pine Cellulosic Fibers-Adhesive Based Polymer Composite

Tensile Behavior of Low Density Thermally Bonded Nonwoven Material

A discontinuous and non-uniform microstructure of alow-density thermally bonded nonwoven materialdisplays in a complicated and unstable tensilebehavior. This paper reports uniaxial tensile tests of alow density thermally bonded nonwoven toinvestigate the effect of the specimen size and shapefactor, as well as the cycl…

Thermal, mechanical and morphological properties of poly (hydroxybutyrate) and polypropylene blends after processing

The ever increasing accumulation of plastic waste in the environment has motivated research on polymers that degrade rapidly after being discarded as possible substitutes for conventional inert plastics. Biodegradable polymers can be an alternative, since they have non-toxic residual products and low environmental per…

Inhomogeneous Poisson point process nucleation: comparison of analytical solution with cellular automata simulation

Microstructural evolution in three dimensions of nucleation and growth transformations is simulated by means of cellular automata (CA). In the simulation, nuclei are located in space according to a heterogeneous Poisson point processes. The simulation is compared with exact analytical solution recently obtained by Rio…

Intumescent Biobased-Polylactide Films to Flame Retard Nonwovens

The work focuses on the development of a newprocess to flame retard nonwovens, using films basedon renewable resources. Films consist in intumescentformulations of polylactic acid (PLA), ammoniumpolyphosphate (APP) blended with lignin or starchand are coated on hemp or wool nonwovens. Theobjective of this study was to…

Electrospinning and characterization of polyamide 66 nanofibers with different molecular weights

Polyamide 66 (PA66) nanofibers of different molecular weights were obtained by electrospinning of formic acid solutions. An ionic salt, NaCl, was also added to the solutions to increase the conductivity. PA66 concentrations between 15-17 wt.(%)/v and electrical fields between 2.0 and 2.5 kV/cm were the best conditions…

Thermodinamically stable phases in the CaO-SiO2-Al2O3-CaSO4-H2O closed system at 25 ºC. Application to cementitious systems

One of the chief causes of cement and concrete deterioration is the loss of durability prompted by sulphate attack. The existing standards call for long test periods (2- 12 months). Thermodynamic modelling is a particularly appropriate technique for studying systems that only reach equilibrium in the long term. Used i…

Sintering behavior of LZSA glass-ceramics

The LZSA glass-ceramic system (Li2O-ZrO2-SiO2-Al2O 3) shows interesting properties, such as good chemical resistance, low thermal expansion, high abrasion resistance, and a low dielectric constant. However, in order to obtain a high performance material for specific applications, the sintering behavior must be better…

Investigating Sulphate Binders Replacement for Phosphate Binders in Tundish Plasters

One of the main reasons for the blocking and sticking of the expendable layer in tundish plaster to the permanent layer and the subsequent increase in refractory consumption and associated costs is the use of low-melting phosphate binders. At high temperatures in continuous casting of steel, phosphate binders provide…

Effect of Equal Channel Angular Extrusion on Dynamic Strain Aging of an Al-Mg-Si-Cu Alloy

An Al-Mg-Si-Cu alloy was subjected to tensile testing, both under solutionized and ECAE-ed conditions, using strain rates of 10-4 s-1 to 10-1 s-1 at temperatures of 25 ˚C to 325 ˚C to investigate the dynamic strain aging (DSA) phenomenon in the alloy. Negative strain rate sensitivity (m) and increasing ultimate tensil…

Modeling of Continuous Electromagnetic Removal of Inclusions from Molten Metals

In this research, a 3-D mathematical model is developed for simulating electromagnetic continuous removal of inclusions from molten metals. The model includes the computation of electromagnetic force field and fluid flow in the presence of electromagnetic forces. The results of flow field together with electromagnetic…

Relationship between Yarn Properties and Process Parameters in False-Twist Textured Yarn

The properties of false-twist textured yarns in the aspects of crimp characteristic and tensile behavior depend mainly on the draw ratio and the D/Y ratio. This study comprises investigations of the effect of D/Y ratio and draw ratio on the crimp and tensile properties and percent crystallinity. While there was no not…

Controlling the conductance and noise of driven carbon-based Fabry–Pérot devices

We report on ac transport through carbon nanotube Fabry–Pérot devices. We show that tuning the intensity of the ac gating induces an alternation of suppression and partial revival of the conductance interference pattern. For frequencies matching integer multiples of the level spacing of the system Δ, the conductance r…

Design and Study of Clothing Structure for People with Limb Disabilities

The human body's features are the key to design clothing structure. Between people with physical disabilities and normal people, there are evident differences in their living requirements. Embellishment is needed because of physical distortion; as well as, functionalized design is strongly required to allow more indep…

Structural, electronic and magnetic properties of V2O5−x: An ab initio study

Pure V(2)O(5) is a diamagnetic layered semiconductor with many applications such as catalysis. In this paper, we study oxygen vacancy-induced changes in the atomic and electronic structures as well as magnetic properties of V(2)O(5-x) within spin density functional theory with generalized gradient approximation. Both…

Static Analysis of Single Walled Carbon Nanotubes (Swcnt) Based on Eringen’s Nonlocal Elasticity Theory

Static analysis of carbon nanotubes (CNT) is presented using the nonlocal Bernoulli-Euler beam theory. Differential quadrature (DQ) method is used for bending analysis of numerical solution of carbon nanotubes. Numerical results are presented and compared with that available in the literature. Deflection and bending m…

Ammonium Dinitramide (ADN)–Prilling, Coating, and Characterization

Abstract Ammonium dinitramide (ADN) is the promising oxidizer, which is expected to be applied, e.g., in solid rocket propellants. The manufacturing of spherical ADN particles (the so‐called ADN‐Prills) with useful morphology and reproducible quality is realized by means of the emulsion crystallization process.

Magnetosensitive transducers for nondestructive testing operating on the basis of the giant magnetoimpedance effect: A review

Experimental data on and model representations of the physical processes in small detectors operating on the basis of the magnetoimpedance effect are analyzed and generalized for conditions adapted to systems of magnetic nondestructive testing. The principles of measuring the high-frequency magnetoimpedance effect in…

Transport through graphene double dots

We present Coulomb blockade measurements in a graphene double dot system. The coupling of the dots to the leads and between the dots can be tuned by graphene in-plane gates. The coupling is a nonmonotonic function of the gate voltage. Using a purely capacitive model, we extract all relevant energy scales of the double…

Free-Space Imaging Beyond the Diffraction Limit Using a Veselago-Pendry Transmission-Line Metamaterial Superlens

Focusing using conventional lenses relies on the collection and interference of propagating waves, but discounts the evanescent waves that decay rapidly from the source. Since these evanescent waves contain the finest spatial details of the source, the image suffers a loss of resolution and is referred to as ldquodiff…