Materials Literature
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The synthesis of photocrosslinkable fluorinated polydimethylsiloxanes was achieved through direct hydrosilylation with copoly(dimethyl)(methyl-hydrogen) siloxane. First, the hydrosilylation of a fluorinated olefin allowed the introduction of a fluorinated group onto the polysiloxane. Then, a second hydrosilylation of…
A niobium-containing MCM-41 mesoporous molecular sieve was synthesized by the hydrolysis of tetraethylorthosilicate and niobium pentachloride, using cetylpyridinium bromide as template in acidic medium, and was found to be highly active in the direct conversion of cyclohexene into trans-2-alkoxycyclohexanol at mild te…
Surface modification of textile goods is receiving increased attention. Such modification needs to retain the mechanical strength of the fibre core hut impart surface functionality for a wide range of conceivable uses. To illustrate the methods and strategies used for fibre surface functionalisation the work of the Ge…
Cationic ring-opening polymerization of ϵ-thionocaprolactone was examined. The corresponding polythioester with the number-average molecular weight (Mn ) of 57,000 was obtained in the polymerization with 1 mol % of BF3 · OEt2 as an initiator in CH2Cl2 at 28 °C for 5 h with quantitative monomer conversion. The Mn of th…
Shear dynamic and elongational rheology of concentrated solutions of cellulose in N-methylmorpholine oxide monohydrate (lyocell) were investigated at different temperatures and for two Hencky strains. Shear thinning and strain thinning behavior is characteristic for dynamic viscosity and effective elongational viscosi…
The solid-phase graft polymerization of hydroxymethyl acrylamide (HMA) onto polypropylene (PP) was realized by employing our self-designed pan-type milling equipment which has a unique and smart structure and can exert quite strong shear forces and pressure on the materials in between and break them down. When PP part…
Raman spectra of an L-threonine crystal were investigated as a function of pressure in a diamond anvil cell up to 43 kbar at room temperature. It was observed that the crystal undergoes a phase transition between 20.3 and 22.4 kbar. This transition is accompanied by changes in the external mode region of the spectra,…
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…