Blending Method

Industrial grade materials employ fillers such as asbestos, silica and glass fibre. These are incorporated by dry-blending methods similar to those used with woodflour-filled phenolic compositions. 

The most commonly used stabilizers are barium, cadmium, zinc, calcium and cobalt salts of stearic acid phosphorous acid esters epoxy compounds and phenol derivatives. Using stabilizers can improve the heat and UV light resistance of the polymer blends, but these are only two aspects. The processing temperature, time, and the blending equipment also have effects on the stability of the products. The same raw materials and compositions with different blending methods resulted in products with different heat stabilities. Therefore, a thorough search for the optimal processing conditions must be done in conjunction with a search for the best composition to get the best results. 

Chu et al. [24] correlated viscosity-morphology and compatibility of PS-PB blends. The effect of styrene-butadiene triblock copolymer in PS-PB was studied, and it was found that the domain size decreases with an increase of compatibilizer loading. The blending methods influenced the morphology due to the difference in the extent of mixing. 

A modern solvent delivery system consists of one or more pumps, solvent reservoirs, and a degassing system. HPLC pumps can be categorized in several ways by flow range, driving mechanism, or blending method. A typical analytical pump has a flow range of 0.001-10 mL/min, which handles comfortably the flow rates required for most analytical work (e.g., 0.5-3 mL/min). Preparative pumps can have a flow range from 30 mL/min up to L/m. 

The outcome of dissolution tests on pharmaceutical formulations can be influenced by a nnmber of factors including the nature of the excipients and lubricants, blending method and granulation procedure used. When the solubility of the API is not the limiting factor, the compaction pressure used to produce tablets is inversely proportional to their dissolution rate and, as noted in the previous section, directly proportional to the slope of the NIR spectra for intact tablets. Blanco et have developed various approaches for... 

The so-called dry mixing or dry blending method has been used for the modification of" particles in the powder technology (59). In this method, surface modification of coarse particles is carried out by mixing fine particles and coarse particles with an auto ceramic mortar or with a centrifugal rotating mixer. This procedure can be applicable for the production of variety of composite magnetic particles. 

The dry impact blending method has recently been used in the investigation of surface modification techniques of particles in the field of powder technology. In... 

This is truly reflected in the morphology of the uncured clay preexfoliated rubber nanocomposite films (NLu NA) prepared by the latex blending method (Fig. 7a). Curing the NR/NA nanocomposites in situ prevulcanization (No>NA) does not alter the arrangements of dispersed clay layers greatly, as seen from the... 

The blending method depends on whether the powder is a grain (flake or short-tube) or a strip powder (or long-tube). 

The recent developments in science and technology require a more exact control of structure/ nanotexture and properties of various materials, including carbon materials. In order to meet the requirements for carbon materials, various novel carbonization processes have been proposed. In relation to electrochemistry, the following processes have to be mentioned template method, polymer blend method, defluorination of fluorinated hydrocarbons, and carbonization of organic aerogels [99],... 

In order to control the pore texture in carbon materials, blending of two kinds of carbon precursors, the one giving a relatively high carbonization yield and the other having a very low yield, was proposed and called polymer blend method [112], This idea gave certain success to prepare macroporous carbons from poly(urethane-imide) films prepared by blending poly(amide acid) and phenol-terminated polyurethane prepolymers [113]. By coupling this polymer blend method with... 

FIGURE 2.26 Scheme of the polymer blend method to prepare carbon nanotubes and their TEM image. (Courtesy of Prof. A. Oya, Gunma University, Kiryu, Japan. With permission.)... 

Shiraishi, S., Kurihara, H., Shi, L., Nakayama, T., and Oya, A. Electric double-layer capacitance of meso/macroporous activated carbon fibers prepared by the blending method. J. Electrochem. Soc. 149, 2002 A855-A861. 

Although the best results can be obtained in using silanes as substrate primers, they can also be added to the adhesive with some effect. The integral blend method of applying the silane involves adding 0.1 to 2.0 percent by weight of the silane to the polymer matrix prior to application. The advantage of this method is that it does not require a separate substrate... 

Ukita, K., Kuroda, M., Honda, H., and Koishi, M., Characterization of powder-coated microsponge prepared by dry impact blending method, Chem. Pharm. Bull., 37, 3367, 1989. 

Aritomi H, Yamasaki Y, Yamada K, et al. Development of sustained-release formulation of chlorpheniramie maleate using powder-coated microsponge prepared by dry impact blending method. J Pharm Sci Tech Yakukzaigaku 1996 56(1) 49-56. 

In order to disperse low concentrations of CPs in thermoplastics and elastomers, it is necessary to prepare highly structured fine aggregates to permit percolation in the polymer blend. With better polymerization techniques and new blending methods, the percolation threshold decreases. Indeed, a critical concentration as low as 1.5vol% and a saturation... 

Fig. 11 Two-step blending method used to create polymer/ceramic composite fibers...

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