Materials Literature
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The galvanic interaction between electronically conductive polyaniline films doped with camphor sulfonic acid (PAni‐CSA), and aluminum alloy (AA) 2024‐T3 has been investigated for the purpose of assessing PAni‐CSA as a corrosion protection coating on AAs. Potentiodynamic polarization and zero resistance ammeter measur…
A coalescence mechanism for the coarsening behavior of polymer blends during a quiescent annealing process is proposed. It suggests that the distribution state of dispersed particles in a matrix obeys a nearest-neighbor distribution function in multibody systems. Both drainage and merge stages are included in the coal…
Imidazole, 2-methylimidazole and benzimidazole-blocked aromatic and aliphatic diisocyanates have been prepared and polymerized with pyromellitic dianhydride in the presence of a basic catalyst. The polymers are characterized with FTIR, 1H NMR and 13C NMR spectroscopy and GPC, DSC and TGA. The structure–property relati…
This paper describes the application of an amplitude modulation-frequency modulation (AM-FM) image representation in segmenting electron micrographs of skeletal muscle for the recognition of: 1) normal sarcomere ultrastructural pattern and 2) abnormal regions that occur in sarcomeres in various myopathies. A total of…
Generation of metabolic sweat is a natural outcome of a person involved in strenuous activity. The absorption of the sweat by a garment and its transportation through and across the fabric where it is evaporated are claimed by some researchers to aid comfort. The measurement of absorption and wicking is therefore of t…
Synthesis and Characterization of Fine Particle Y 2 O 2 S : Eu Red Phosphor at Low‐Voltage Excitation, Kottaisamy, M., Horikawa, K., Kominami, H., Aoki, T., Azuma, N., Nakamura, T., Nakanishi, Y., Hatanaka, Y.
The reprocessing of injection-molded polycarbonate was studied in an attempt to understand the physical background for the variation of its performance upon sequential molding cycles. The effect of reprocessing on different properties of the moldings and the regrind is presented and discussed. A quantitative analysis…
FTIR spectroscopy and thermal analysis were applied to study the nylon 6–lithium salt systems. The DTA results show that lithium ions cause a significant reduction of the melting point of nylon–lithium salt samples. In addition, lithium salts can also prevent the crystallization of molten nylon in the cooling process.…
To establish an easy and rapid method for measuring the adhesive strength of fibrin glue and to clarify the factor(s) most affecting the strength, a study was made on the effect of the concentration of plasma components on the strength of cryoprecipitate (Cryo) prepared from a subject's own autologous plasma to be use…
Molecular dynamics simulations and self-consistent field calculations have been used to study average polymer paths of end-grafted, strongly overlapping polymers in a good solvent. Contrary to what is usually assumed, and in agreement with earlier classical and self-consistent field results, we find the end points of…
To elucidate the mechanism of dimensional changes in alginate impression in solutions, the relationship between the ion concentrations in three types of solutions (nonelectrolyte and monovalent and divalent metallic salts) and change in gel volume was examined. The gel in the monovalent metallic salt solution expanded…
Production of biodegradable plastic, polyhydroxyalkanoate (PHA) was demonstrated using culture of moderately haloakalitolerant Halomonas campisalis MCMB-1027. Production of PHA was carried out at different aeration (0.5-1, 1, and 1.5 vvm) and agitation (100,150 and 200 rpm) in 14 L fermenter. Maximum production of PHA…
The mechanism for fatigue failure in extremely high cycle fatigue in the regime of N>107 is discussed. A special attention was paid to a newly found particular fracture morphology in the vicinity of fracture origin (subsurface nonmetallic inclusions) of a heat treated Cr-Moalloy steels (Specimen QT). The particular mo…
Reaction of either 1,10-phenanthroline-2-thioamide or pyridine-2-thioamide with 1,4-dibromobutane-2,3-dione affords the novel thiazole-containing polydentate ligands L1 and L2, respectively; these ligands form dinuclear double and triple helicate architectures, respectively, with Cu2+.
This study was undertaken to examine the unresolved questions surrounding the influence of household fabric softeners and cellulase-enzyme containing laundry detergents on pilling and strength of selected fabrics. Results showed that dryer sheet softeners were not associated with an increase in pilling, a greasy hand,…
XPS spectra have been obtained from 11 metals in the third row of transition elements using a Quantum 2000 Scanning ESCA Microprobe. The metals analyzed include La, Hf, Ta, W, Re, Ir, Pt, Au, Tl, Pb, and Bi. Each sample was Ar+ ion etched before XPS analysis to remove surface contamination and/or oxide. The spectra in…
The partially THF-solvated dipotassium salt of the novel bis-chelating dianion [ButN(Se)P(μ-NBut)2P(Se)NBut ]2− forms an infinite network of twenty-membered K6Se6P4N4 rings involving two types of K···Se interactions.
The experimental evaluation of permeability parameters encounters different difficulties, depending on the features of the materials. Traditional steady‐state techniques for refractory castables and other highly dense ceramics demand arduous work and require reliable measurements at high pressure and for extremely low…
Preparation and shear and elongational rheology of cellulose solutions of different degrees of polymerization (DP) in N-methylmorpholine oxide monohydrate (lyocell) were investigated. The dissolution process takes place in two stages, depending on the content of low and high DP fractions from the dissolving pulp blend…
Elastometric materials are used as barriers to protect workers against exposure to chemicals. The effectiveness of a polymer as a chemical protective material therefore depends on the rate of the permeation of chemicals through it. The permeation rate depends on the solubility and the diffusion coefficient of chemical…