Geometry fibre

Polymer nanocomposites are combinations of polymers containing inorganic or organic fillers of definite geometries (fibres, flakes, spheres, particulates and so on). The use of fillers, which have one dimension on the nanometre scale, enables the production of polymer nanocomposites. Functional nanocomposites with specific properties can be custom-made by combining metal nanoparticles (MNP) into the polymer matrix. 

Revil dkovi, ]., Jambrich, M. and Staskovanovi, A. (1993) Fibre properties with changed cross-sectional geometry. Fibres and Textiles East. Europe, 1(2), 17-20. 

All of the above trends make a planar platform configuration the ideal choice for the development of such sensors due to the compatibility of this geometry with a range of microfabrication technologies, the availability of low-cost materials for the production of such platforms and the robust nature of planar configurations when compared with alternatives based on optical fibres. 

Figure 4.127 shows the creep modulus of several grades of glass fibre reinforced LCPs in various conditions of sample geometry, loading and temperature. The two samples tested... 

The carcinogenic effect of a fibre depends on the concentration (exposure ), the geometry of the fibre, which is also called fibre dimension (which also determines the inhalability ) and also the biodurability (persistence in the body or dissolution of the fibres by the body). 

It is evident that fibre geometry and biodurability are the decisive criteria for the carcinogenic properties of fibres. However, there are differing opinions between fibre manufacturers and occupational health and safety experts in the EU and Germany concerning the examination and measuring methods and the evaluation of the carcinogenic properties. 

Fibre optic-based flow-through optical biosensors The dramatic advances in fibre optic development in die last decade have promoted construction of sensors where radiation, whether emitted, transmitted or reflected, is conducted fi-om the sample to the detection system. The wide variety of available optical waveguide types (solid rods, hollow cylinders, micro-planar geometries) has been used with varying success in sensor development. 

Chemical vapour deposition (CVD) is employed to prepare adherent films of controlled composition and thickness. Protective coatings, micro- and opto-electronics, ceramic fibres and ceramic-matrix composites production represent the usual applications of this technique, which allows surfaces of complex geometry to be uniformly coated. 

A ceramic matrix composite or CMC is composed of two or more solids, the matrix of which consists of a ceramic material or carbon. The crystalline, ceramic matrix is moulded and/or densified at a temperature of at least 1000 K. To the matrix one ormore solid inorganic substances are added, e.g. in the form of particles or fibres in order to alter the (thermo) mechanical properties of the pure matrix. In the composite s microstructure these additives can still be distinguished by their chemicalcomposition or geometry even after they have undergone a temperature treatment of at least 1000 K. 

Figure 7.12 Some geometries used to study the dynamics of contact angle phenomena (A) spreading drop, (B) liquid advancing in a capillary, (C) plate, tape or fibre immersed in a liquid, and (D) rotating cylinder in a pool of liquid.

The fibre-optic-based collection scheme developed for conventional Raman spectroscopy [29] is equally valid for SORS. In the original concept, the collection fibres (arranged in a disk pattern) were re-organised onto the spectrograph slit into a linear pattern matching the geometry of the spectrograph... 

The fixed nature of the collection fibres in a conventional SORS experiment limits the range of spatial offsets available. An alternative approach (inverse SORS) swaps the laser and collection fibre geometries Raman light is collected through a group of fibres (arranged in a disc shape) contained within the centre of a probed area defined by a ring-shaped laser beam (see Fig. 3.5). 

Kohler et al. discussed the potential of the chemiluminescence technique as an industrial test method. Imaging chemiluminescence was used to assess antioxidant performance. An advantage over oven aging was found to be the possibility for evaluation of the oxidative stability of samples with unusual geometries, such as fibres and powder particles [136]. A correlation was also found between oven aging and chemiluminescence measurements on stabilised PP and it was shown that chemiluminescence measurements done at... 

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