correlation of photon and acoustic emission with failure events in model composites

the photon emission (phe) and acoustic emission (ae) accompanying the deformation and failure of model composites were investigated, and related to various failure events. unidirectional composites containing from 1 to 300 fibers were strained in tension, and photon and acoustic emission (in some cases, electron emission) monitored before..

problematika povrchove upravy plastu naterovymi hmotami $left bracket$ problems involved in surface treatment of plastics by painting $right bracket$

general principles of painting plastics products are dealt with. efficient painting methods including suitable types of paints are described. polyethylene, polypropylene polyvinyl chloride, polymethyl methacrylate, polystyrene, acrylonitrile butadiene styrene, styrene acrylonitrile copolymer, polycarbonate, cellulose acetate butyrate, pol..

modern laser applications

manufacturing companies in both the mechanical and electrical sectors of industry are now beginning to adopt lasers for an increasing range of materials processing applications, including cutting, drilling, welding and surface treatments of both metals and non-metals. in some of these applications the process or product is completely nove..

laundering variables in removing carbaryl and atrazine residues from contaminated fabrics

during mixing and application of pesticides, the clothing worn by agricultural or urban pesticide applicators is subject to contamination. completeness of pesticide removal in laundering is essential if the garment is to be used again. this study examines the efficacy of laundering variables such as detergent type, wash water temperature ..

results from the work of the department of man-made fibre technology of the s. m. kirov leningrad institute of textile and light industry during 1981-1985, and prospects in the twelfth five-year period

a discussion is presented of sorptively-active and biologically active fibers, their properties and manufacture. methods have been developed for preparing fibers based on carbochain polymers-polyvinyl alcohol (pva) or polyacrylonitrile (pan) - which have cation-exchange, anion-exchange, amphoteric, or complex-forming properties, which con..

rheological properties of spinning compositions for spinning biocatalyst fibre

rheological properties of protein-containing spinning compositions intended for spinning biocatalyst fibers have been studied. the rheological properties of these spinning compositions depend on the composition of the aqueous phase, the concentration of protein, and the modification of the protein; this is explained by a change in state o..

poprawa wspolczynnika tarcia poliamidu w wyniku pewnych metod modyfikacji jego warstwy wierzchniej. $left bracket$ improvement of the friction coefficient of polyamide as a result of certain methods of modifying its surface layer $right bracket$

glass fiber reinforced polyamide (of itamid 35 type) was subjected to diffusive stabilization with hydroquinone and potassium iodide. unreinforced (of tarnamid t-27 type) was subjected to combined modification by diffusive stabilization and burnishing by vibratory shot peening. the best improvement of the tribological properties was obtai..

new coupling agent for aramid fibers

various compounds were used for the surface treatment of aramid fibers in order to promote adhesion to polymeric matrices. the improvement of adhesive bond could be based either on the roughness of fiber surface or on chemical modification introduced by grafting the compounds used are more or less reactive to the secondary amide groups, p..

in vitro method for evaluation of the irritancy of anionic surfactants

extraction of coomassie brilliant blue r250 dye from gelatin by anionic surfactants was found to be proportional to the concentration, duration of extraction, and the nature of the surfactant. under a given set of conditions, the decreasing order of dye extraction was sls $greater than$ las $greater than$ sodium laurate $greater than$ aos..

investment casting nickel-beryllium alloys

a family of nickel-base beryllium alloys produced by ngk metals corporation is predominantly used in jewelry, dental applications, surgical instruments, and plastic and glass-industry tooling designated berylco, these alloys are known for corrosion and wear resistance, as well as their luster characteristics. the foundry characteristics o..