Statistical-thermal model calculations using THERMUS
Selected results obtained using THERMUS, a newly-developed statistical-thermal model analysis package, are presented.
Materials Literature
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Properties and preparation of thermoplastic polyurethane/silica hybrid using sol–gel process
Abstract A thermoplastic polyurethane elastomer/silica hybrid (TPU/SiO 2 ) was prepared using the sol–gel process. This work was undertaken to investigate the thermal and physical properties of this type of hybrid by employing different catalyst systems during sol–gel processing. Two types of catalyst systems includin…
Nanoporous alumina as a dielectric for microcavity plasma devices: Multilayer Al/Al2O3 structures
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation S.-J. Park, K. S. Kim, J. G. Eden; Nanoporous alumina as a dielectric for microcavity plasma devi…
Analysis of the kinetics and current efficiency of pyrrole galvanostatic electropolymerization
Abstract We propose a modified kinetic equation for the galvanostatic electropolymerization of pyrrole based on equal rates of monomer disappearance and its galvanostatic electropolymerization associated with applied current ( I ). The equation is distinguished by a zero‐order kinetic plot and takes into account the e…
Critical thickness for ferroelectricity of BaTiO3 by first-principles calculations
The critical thickness for ferroelectricity of a BaTiO3 film was determined by the first-principles discrete variational-Xα molecular orbital method and population analysis. Under the assumption that most ferroelectric perovskite oxides are predominantly ionic, a series of model clusters were developed for a BaTiO3 pa…
Domain resonance in two-dimensional periodically poled ferroelectric resonator
A two-dimensional periodically poled ferroelectric resonator is reported. The theoretical calculations, computer simulations by the finite element method and experimental data from the lithium tantalite samples reveal a domain acoustoelectric resonance. A polarization inversion in a y-rotated cut of a ferroelectric ch…
Fabric design considering the optimisation of seam slippage
Purpose The dependence of seam slippage values on fabric construction parameters makes this property an interesting case for study. Design/methodology/approach In this study, made on a significant wool and blended fabrics sample, the seam slippage was measured, either in warp direction (weft yarns slip), or in weft di…
Barrier resistance of polyethylene, polyethylene/modified polyamide, and polyethylene/blends of modified polyamide and ethylene vinyl alcohol bottles against permeation of polar and nonpolar mixed solvents
Abstract The main objective of this study is to investigate the barrier properties and mechanisms of polyethylene (PE), PE/modified polyamide (MPA), and PE/blends of MPA and ethylene vinyl alcohol copolymer (MPAEVOH) bottles against permeation of polar/nonpolar (acetone/white spirit) mixed solvents. The mixed solvent…
Determining temperature regulating factor for apparel fabrics containing phase change material
Purpose In order to characterize the temperature regulating ability of fabrics containing phase change material (PCM), the test instrument has been designed and built. Design/methodology/approach To assess temperature regulating ability, temperature regulating factor (TRF) is determined. TRF is defined by Hittle as a…
Preparation of high-permeability NiCuZn ferrite
Appropriate addition of CuO/V2O5 and the reduction of the granularity of the raw materials particle decrease the sintering temperature of NiZn ferrite from 1200 degrees C to 930 degrees C. Furthermore, the magnetic properties of the NiZn ferrite prepared at low temperature of 930 degrees C is superior to that of the N…
Wall-fluid and liquid-gas interfaces of model colloid-polymer mixtures by simulation and theory
We perform a study of the interfacial properties of a model suspension of hard sphere colloids with diameter ${\ensuremath{\sigma}}_{c}$ and nonadsorbing ideal polymer coils with diameter ${\ensuremath{\sigma}}_{p}$. For the mixture in contact with a planar hard wall, we obtain from simulations the wall-fluid interfac…
Effects of nano calcium carbonate modified by a lanthanum compound on the properties of polypropylene
Abstract The surface modification of nano calcium carbonate (nCaCO 3 ) particles was carried out with a soluble compound of lanthanum via a coating process of chemical deposition, and nCaCO 3 particles covered with a compound of lanthanum (nCaCO 3 La) were prepared. The polypropylene (PP)/nCaCO 3 and PP/nCaCO 3 La c…
Crystallization behavior of poly(butylene succinate)/corn starch biodegradable composite
Abstract The effects of corn starch (CS) filler and lysine diisocyanate (LDI) as a coupling agent on the crystallization behavior of a poly(butylene succinate) (PBS)/CS ecocomposite were investigated using differential scanning calorimetry. In isothermal crystallization, n values for pure PBS were from 2.33 to 2.82. O…
Effect of compatibilization on the oxygen‐barrier properties of poly(ethylene terephthalate)/poly(m‐xylylene adipamide) blends
Abstract The improvement of the oxygen‐barrier properties of poly(ethylene terephthalate) (PET) via blending with an aromatic polyamide [poly( m ‐xylylene adipamide) (MXD6)] was studied. The compatibilization of the blends was attempted through the incorporation of small amounts of sodium 5‐sulfoisophthalate (SIPE) in…
Morphology and activity of nanosized NdCl3 catalyst for 1,3‐butadiene polymerization
Abstract The binary lanthanide catalyst for 1,3‐butadiene was invented for 40 years ago. However, it has not been employed in commercial application due to its poor solubility and low activity. Nanosized neodymium chloride (NdCl 3 ) was prepared in tetrahydrofuran (THF) medium through dissolution, chelation, and collo…
Synthesis and properties of soluble polypyrrole doped with dodecylbenzenesulfonate and combined with polymeric additive poly(ethylene glycol)
Abstract Soluble polypyrrole (PPy) samples advanced in electrical conductivity σ were chemically synthesized with dodecylbenzenesulfonate (DBS) sodium salt as a dopant, with poly(ethylene glycol) (PEG) as an additive, and with ammonium persulfate as an oxidant. The PPy–DBS–PEG samples were soluble in organic solvents…
New measurement technologies for textiles and clothing
Purpose To establish new measurement technologies in textiles and clothing. Design/methodology/approach Three areas are covered, diverse in methodology and approach: measurement of fabric mechanics, measurement of seam quality, and measurement of human size and shape. Findings Three new measurement technologies have b…
Effect of structural disorder on some physical properties of the Cu2MnAl Heusler alloy films
The structural dependence of the magnetic, transport, optical, and magneto-optical (MO) properties of Cu2MnAl Heusler alloy (HA) thin-film samples was investigated. Disordered thin films of Cu2MnAl HA fabricated by vapor-quenching deposition onto substrates cooled by liquid nitrogen behave as highly resistive Pauli pa…
X-ray spectroscopic study of the electronic structure of the high-dielectric-constant materialCaCu3Ti4O12
The element-specific valence- and conduction-band densities of states for the high-dielectric-material $\mathrm{Ca}{\mathrm{Cu}}_{3}{\mathrm{Ti}}_{4}{\mathrm{O}}_{12}$ have been measured using soft x-ray emission and absorption spectroscopies. Ti ${L}_{\ensuremath{\alpha},\ensuremath{\beta}}$, Cu ${L}_{\ensuremath{\al…
Photoswitchable Smectic Liquid‐Crystalline Elastomers
Abstract Summary: We succeeded in the synthesis of azo side chain containing polysiloxanes with broad smectic C* and A phases. In these polymers the phase transition temperatures can be shifted reversibly by up to 17 °C by irradiation with UV ( cis ) or VIS ( trans ) light. Thin films of these polymers in the smectic…