Transparent acrylic

Experiments were carried out in a conical shape gas fluidized bed (0.1 m-i.d. x 0.6 m-high) that made of a transparent acryl column with an apex angle of 20°. The details of the conical fluidized beds can be found elsewhere [3]. Air velocity (Ug = 0-1.4 m/s) were measured by a flowmeter. The particle used in this study was 1.0 mm glass beads with a density of 2,500... 

Typical physical properties for an injection-molded transparent acrylic polyblend resin are given in Table II. The injection molding conditions used are given in Table III. Tensile, flexural, and impact properties are within the range reported for typical ABS and high impact polystyrene resins. Optical properties approach those of the acrylics [i.e., poly (methyl methacrylate)]. The strength properties are on the low side of those reported in the first paper for the transparent diene... 

Figure 1 is a schematic diagram of the experimental setup. The test section is a horizontal rectangular channel 40 mm in height (H), 160 mm in width (W), and 6,000 mm in length (L). The rectangular channel is completely constructed of transparent acrylic resin, as shown in Figure 2. Tap water and air are used as the gas and liquid phases, respectively. Water is circulated by a 2.2 kW pump fed by a water reservoir 4.2 m away. Air bubbles are injected into the horizontal channel from the upper inner surface of the channel. An array of capillary needles produces bubbles 10-100 mm in length. Before the air and water are mixed, their volumetric flow rates are measured. After leaving the horizontal channel, the gas-liquid mixture is dumped into a tank that acts as a bubble remover when the liquid phase is recirculated it is free of bubbles. At the end of the horizontal channel tracer particles are added to the water to act as ultrasound reflectors. The mean particle diameter is 200 pm and the particle density is 1020 kg/m3. These tracer particles are assumed to...

Fig. 9.7.13 Early fluidic interface to microchip designed by the author using an o-ring sealing system. Details show o-ring mating with fluid ports on chip, which is pressed to o-rings using an acrylic cover plate that is bolted to support block underneath. The chip mount is made from transparent acrylic for demonstration purposes.

Radial Flow Models. The sector models were constructed of transparent acrylic material that was packed with glass beads and initially saturated with a model oil in the lower part and gas in the upper part. Wall effects were found to be insignificant, and gas—liquid transition zones were of negligible height (1—2 cm). Further model properties are listed in Table I. The models were equipped with individual production—injection perforations in contact with specific intervals of the formation. All sector model experiments were conducted at room temperature and pressures below 1.5 bar absolute. It was possible to visually discern the presence of gas, injectant (with the aid of a dye), and model oil in the porous medium. With the aid of a strong backlight, the fluid that was present at the wall in a given location was also seen to be present across the entire model cross-section. 

The FCT built a small-scale physical model of the preheater tower, up to cyclones lA and IB, having the scale of a laboratory model to an actual plant of 1 35.5. The model was made of transparent acrylic for visibility inside to visualize the flow streams and mixing (Figure 31.20). The existing burners were modeled as slots on the acrylic model, and new FCT design auxiliary model burners were tested as a possible solution. A water-bead modeling reveals the aerod5mamics inside of the riser duct the kiln exhaust was represented by water in the model. For the visualization of flow, neutrally buoyant polystyrene beads follow the water flow accurately and beads allow the flow streams to be visualized ... 

Photochemical Stability of UV-Screening Transparent Acrylic Copolymers of 2-(2-Hydroxy-5-vinylphenyl)-2 -benzotriazole... 

Cellulose nanofibers from different sources have showed remarkable characteristics as reinforcement material for optically transparent composites [160, 161], Iwamoto et al. [160] prepared optically transparent composites of transparent acrylic resin reinforced with cellulose nanofibers extracted from wood pulp fibers by fibrillation process. They showed that cellulose nanofiber-reinforced composites are able to retain the transparency of the matrix resin even at high fiber content (up to70 % wt). The aggregation of cellulose nanofibers also contributes to a significant improvement in the thermal expansion properties of plastics. 

In one example, a quaternary ammonium salt of dimethylaminoacry-lamide (Q modified monomer of acryUc resin) was ion-bonded to silicate layers, while ethyl acrylate (EA) and acrylic acid (Aa) were copolymerized in the clay gallery. The ratio between the EA and the Aa was 10 1 (molar ratio). Eour kinds of acrylic resin-clay nanocomposites were polymerized. Their clay contents were 1, 3, 5 and 8 wt % on the basis of the solid acryhc resins. Suspensions with greater than 3 wt % clay addition acted as pseudoplastic fluids. Transparent acrylic resin-clay nanocomposite films cross-Hnked by melamine... 

MABS is similar to ABS except for the addition of an additional monomer, usually methyl methacrylate. MABS is an amorphous, clear, transparent material with thermal and mechanical properties like ABS. The transparency is achieved by matching the refractive indices of the matrix resin (the transparent acrylate—acrylonitrile—styrene polymer) with the polybutadiene rubber impact modifier. MABS has the highest impact resistance of all the styrenic plastics. Sometimes called transparent... 

Zylar High transparency acrylic terpolymers Novacor Chemicals Inc. 

S3/2 I15/2 = 550 nm (Fig. 16.19). These emission bands match well with the absorption of c-Si. Note that the exact emission wavelength can vary by 10 nm depending on the host material. Shalav et al. in 2005 reported the application of NaYp4 20 %Er phosphors as the upconverters in a bifacial c-Si solar cell [48]. These phosphors were mixed into an optically transparent acrylic adhesive medium at a concentration of 40 wt% and then placed on the rear of a bifacial c-Si solar cell. Reflective white paint was used as a reflector on the rear of the system. An external quantum efficiency of 2.5 % was obtained for the solar cell under excitation at 1523 nm with a 5.1-mW laser. More recently, Fischer et al. also investigated the... 

Fig. 17-2. Effect of bulb location on collimation of light when piping light through transparent acrylic rod. Courtesy E. L DuPont)...

The evaluation of the mixing process was carried out in a test set-up based on monitoring the flow of coloured liquids in the channels. The transparent acrylic plastic block with the channels was placed on an X, Y, Z stage underneath a video camera with microscope optics. The inlets of the channels were connected to liquid reservoirs and the flow rates were controlled by hydrostatic pressure. The video signals were recorded and later analyzed in slow-motion play-back. 

Preactivated and Water-Activated Types. A typical preactivated industrial-type zinc/air cell, the Edison Carbonaire cell, is manufactured in a 1100-Ah size and is available in two-and three-eell configurations, as illustrated in Fig. 38.12. The cell case and cover are molded from a tinted transparent acrylic plastic. The construction features are shown in Fig. 38.13 identifying the wax-impregnated carbon cathode block, the solid zinc anodes, and the lime-filled reservoir. These cells normally have a bed of lime to absorb carbon dioxide and to remove soluble zinc compounds from solution and precipitate them as calcium zincate. They are made with transparent cases so that the electrolyte level and the state of charge can be monitored visually. The state of charge can be monitored by observing the condition of the zinc plates and the condition of the lime bed. The bed turns darker as it is converted to zincate. 

See through" case and cover molded from a tinted, transparent acrylic plastic — one of the toughest of these materials (the same as used for our nickel-cadmium storage battery cases and covers). 

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