fiber optic sensors utilizing surface reflections

presents test results from reflection-based fiber optical sensors, and discusses several examples of reflective sensor applications. reflection sensing techniques can be used to measure the displacement of suspended mirrors for proximity and motion sensing. in addition, reflections can be used to gauge the surface finish of machined parts..

butadiyne vapor deposition polymerization on carbon fibers

the vapor deposition of butadiyne, c/sub 4/h/sub 2/, has been investigated as a novel approach to the application of surface treatments and coatings on carbon fibers to promote adhesion to matrix resins. a thin adherent polymer coating is formed on carbon fibers when mildly heated (25 to 100 degrees c) in an atmosphere of butadiyne monome..

nylon fiber reinforcement for polyurethane composites

the potential of a nylon 6 fiber was evaluated for composite applications involving rigid polyurethane systems. a study showed that the use of compet n, a nylon 6 based fiber surface treated to enhance wetout and adhesion, in an isp polyurethane system results in composites with higher impact values and lower weight than those reinforced ..

mechanical properties of particulate filled polymers

the mechanical properties of several types of inorganic fillers were investigated in a number of different thermoplastic polymers. the fillers included minerals, such as talc and silicon carbide, and metals, such as aluminium flake and stainless steel fibers. the polymers included general electric's noryl, acrylonitrile-butadiene-styrene ..

effects of cellulose fibers in polypropylene composites

a systematic study of the effect of surface pretreatment of cellulosic fibers and the processing time and temperature on the mechanical properties of the cellulose-containing polypropylene was undertaken. using nontreated fibers, the elastic modulus increased gradually with the cellulose content, typically doubling its value at 30 phr fib..

micro glucose sensors using electron mediators immobilized on a polypyrrole-modified electrode

an amperometric micro enzyme electrode for the analysis of glucose is described. micro gold electrodes fabricated by the sputtering methods are used as transducers of micro glucose sensors glucose oxidase (god) is strongly adsorbed onto a polypyrrole film electropolymerized in aqueous solution. 1-1'-dimethylferrocene is used as a mediator..

effect of surface treatment on the strength of fiber glass plastics at low temperatures

the effect of three types of lubricant (paraffin emulsion polyterpene, organosilicon compound based) on the bending strength and crack formation of fiber glass plastics at temperatures of 293 and 77 k, and their resistance to thermal shocks, were investigated

fiber optic sensors to measure beats and linear dimensions in gap

the quality indices of articles under lathe treatment are the correspondence of the dimensions to those assigned, the frequency of surface treatment, and the deviation from circular shape. it is noted that the majority of lathe tools with numerical program control used in the gap system are not equipped with control units and therefore th..

effect of a protective polymeric coating on the strength of fiber light guides made of chalcogenide glasses

the authors studied the strength characteristics of fiber light guides made from ge/sub 5/as/sub 38/s/sub 57/ glasses having a protective polymeric coating of fluoroplastic-42. they find that coating of the light guides leads to an increase in their average strength by a factor of 2.5 to 3. this makes possible wider use of such light guid

effect of modification of the surface of glass fibers on the working capacity of corrosion-resistant fiber glass plastics

seal failure which occurs in phase penetration of an aggressive medium through the structure of a composite, and more precisely, through cracks formed in it, is the limit of working capacity of corrosion-resistant fiber glass plastics (cfgp). the state of the interface between the glass fibers and polymer matrix in these composites plays ..