Materials Literature
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Nanowire arrays have been used as prototypes to investigate basic issues such as size effect, shape anisotropy, and dipolar interaction on the magnetic properties. Under ideal conditions, the nanowires are approximated as perfect long cylinders. Here, coherent rotation as the magnetization reversal mode cannot complet…
The time course of self-assembly of a hybrid hydrogel system was investigated using dynamic light scattering (DLS) techniques. The self-assembling system consisted of a hydrophilic synthetic N-(2-hydroxypropyl)methacrylamide (HPMA) polymer backbone and a pair of oppositely charged peptide grafts (CCE and CCK). These t…
Abstract The effects of small molecule plasticizer of liquid acrylonitrile‐butadiene rubber (LNBR) on coordination crosslinking reaction between acrylonitrile‐butadiene rubber (NBR) and copper sulfate (CuSO 4 ) were investigated. Attenuated total reflectance infrared (ATR‐IR), curing curves analysis, equilibrium swell…
Polyacrylamide (PAAM) nano silica inclusions composites were prepared having different ratios of nano silica. The silica inclusions were either modified or unmodified. The nanocomposite films were characterized by transmission electron microscope (TEM) and infrared spectroscopy (IR). The dielectric behavior of the com…
We study the dynamics of annihilation of point defects in Langmuir monolayers. The absence of hydrodynamic effects allows us to quantitatively relate the asymmetry in defect mobility to the elastic anisotropy of the material, which in turn can be varied through the control of the surface pressure applied to the monola…
Abstract The melt grafting of glycidyl methacrylate (GMA) onto high‐density polyethylene (HDPE) in the presence of free radical initiators was investigated in the batch mixer. The graft content was determined with the titration and FTIR spectroscopy. The graft content increased with the increase of peroxide and initia…
Depolarization field and misfit strain are two important factors that greatly influence the properties of ferroelectric thin films. The present work studies the effect of depolarization field on polarization states in a single-domain ferroelectric thin film with nonequally biaxial in-plane misfit strains. Three couple…
Abstract Thermoplastic vulcanizates (TPVs) are a special class of thermoplastic elastomers that are generally produced by the simultaneous mixing and crosslinking of a rubber with a thermoplastic polymer at an elevated temperature. Novel peroxide‐cured TPVs based on blends of silicone rubber and the thermoplastic Enga…
Abstract Submicrometer polystyrene (PS) latex doped with functional polyoxometalates (POMs) has been elaborated via two steps. The first step is the electrostatic encapsulation of POMs by polymerizable surfactants through the replacement of counterions, forming the supramolecular complexes which are organic compatible…
Abstract Silver nanoparticles were immobilized on the surface of polypropylene (PP) porous beads by an ultrasound‐assisted reduction method. The structure and properties of the silver–PP composite were characterized with XRD, TEM, HRSEM, EDX, XPS, and Raman spectroscopy. Water‐soluble polymers such as PEG, PVA, and PV…
Abstract Dispersion of CNTs in polymers can yield impressive property enhancements at low volume fractions, thus maintaining the inherent processability of the polymer. In particular, they can improve the electromechanical response of piezoelectric polymers by lowering the actuation voltage and increasing strain and s…
After an introduction of the basic concepts for solid-state-lighting, i.e. multi-chip LEDs and phosphor-conversion LEDs based on blue or near-UV pump LEDs, white LED phosphors are discussed regarding their match to different application requirements. Since the US Energy Star requirements have set first 'standards' for…
We have studied the crystal and electronic structure of monoclinic (MC) InSe under pressure finding a reversible phase transition to a ${\mathrm{Hg}}_{2}{\mathrm{Cl}}_{2}$-like tetragonal phase. The pressure evolution of the crystal structure was investigated by angle-dispersive x-ray diffraction and Raman spectroscop…
To capitalize on the unique size and shape-dependent optical and electronic properties of nanoscale particles for liquid crystal (LC) applications, detailed structure and size-property relationship studies are critical. To enhance our understanding of the thermal, optical and electro-optic effects of nanoparticles in…
Abstract Dynamic mechanical properties determine the potential end use of a newly developed extruded nylon–wood composite in under‐the‐hood automobile applications. In this article, the dynamic mechanical properties of extruded nylon–wood composites were characterized using a dynamic mechanical thermal analyzer (DMTA)…
Multiferroic (MF) materials are very promising candidates for new technologies and applications because they exhibit simultaneously multiple cooperative phenomena (i.e., magnetic, electric, and piezoeffects). The main feature of MF materials is the magnetoelectric (ME) effect, which can be used to engineer highly sens…
Abstract The effects of elevated temperature aging on the microstructural changes of isotactic polypropylene matrix in a composite have been studied using wide‐angle X‐ray scattering (WAXS) and Fourier‐transform infrared spectroscopy (FTIR). The objective was to quantify small and slow changes in crystallinity due to…
Inspired by the remarkable adhesive capabilities to wet surfaces of the secretes of the brown alga Fucus serratus, novel glues have been designed and characterized. Formulations composed of phloroglucinol, alginate, and calcium ions are capable of adhering to a variety of surfaces. Rheological data show that the prese…
Understanding the mechanisms by which vertical arrays of carbon nanotube (CNT) forests terminate their growth may lead to the production of aligned materials of infinite length. We confirm through calculation of the Thiele modulus that several prominent systems reported in the literature to date are not stunted by dif…
Abstract A series of biodegradable poly( L ‐lactide‐ co ‐ϵ‐caprolactone) (PCLA) copolymers with different chemical compositions are synthesized and characterized. The mechanical properties and shape‐memory behaviors of PCLA copolymers are studied. The mechanical properties are significantly affected by the copolymer c…