Glass synthetic

Synthetic gas Synthetic gaseous fuel Synthetic glasses Synthetic gums... 

In the eady 1920s, experimentation with urea—formaldehyde resins [9011-05-6] in Germany (4) and Austria (5,6) led to the discovery that these resins might be cast into beautiful clear transparent sheets, and it was proposed that this new synthetic material might serve as an organic glass (5,6). In fact, an experimental product called PoUopas was introduced, but lack of sufficient water resistance prevented commercialization. Melamine—formaldehyde resin [9003-08-1] does have better water resistance but the market for synthetic glass was taken over by new thermoplastic materials such as polystyrene and poly(methyl methacrylate) (see Methacrylic polya rs Styrene plastics). 

Mascolo, G. 1973. Hydration products of synthetic glasses similar to blast furnace slag. Cement and Concrete Research, 3, 207-213. 

Boron isotope ratios have been studied in ageothermal system from New Zealand (Ngawha) by MC-ICP-MS (Axiom with eight movable Faraday collectors, from Thermo Electron).188 The 8nB values range between — 3.1 %o and —3.9%e, which does not indicate any marine input into the system. A direct determination of boron isotopes (8nB) on natural and synthetic glass samples at < %o precision at the ng level has been proposed using LA-ICP-MS with multiple electron multipliers.129... 

Generally, the leaching rates of puddle glass determined by the one-pass dynamic leaching method decrease with time in a similar fashion to those determined on synthetic glasses using various static methods. 

Standard Classes. The accuracy of the AAS method has been assessed by analysis of the 10 synthetic glasses prepared for the European Science Foundation (ESF) and of Corning Standard D, which also served to determine the precision of the results. These standards were selected in preference to glasses with better-evaluated specifications because their compositions are representative of medieval stained glass. 

PVDF (60,90,118) Synthetic, glass or carbon-fiber backed D3222 (Homopolymer only)... 

B.C.E. These may well have been by-products of copper smelting or pottery glazing. By 2500 B.C.E. small pieces of true synthetic glass appeared in areas such as Mesopotamia, but an actual glass industry did not appear until about 1500 B.C.E. in Egypt. By this time various small vases, cosmetic jars, and jewelry items made of glass had begun to appear. 

Figure I. Molecular composition of synthetic glasses examined...

Zeolitization of Synthetic Glasses. The formation areas of some products, obtained in different conditions from both series of glasses (Figure 1), are shown in Figures 2 and 3. Figure 2 refers to the series... 

While a number of works have contributed to Mossbauer spectra of synthetic glasses (12-17), only a few studies have been reported on obsidians, which constitute a typical amorphous mineral of terrestrial origin. Although the Fe VFe ratios (0.32-0.45) in obsidians from... 

The ultimate goal of research in green composites is to replace the existing synthetic glass fibers with natural fibers as reinforcements and also to replace petroleum-based polymers with renewable-resource-based bipolymers as matrices in designing and engineering of biocomposite materials [33]. 

Composites are engineered materials that contain two or more constituents with different properties that remain distinct from one another within the structure. POCs are a subset of the larger polymer composites group. The increased synthesis of POCs with different additives is necessary to satisfy the industrial demand that cannot be fulfilled by pure polymers. Additive materials can be classified as micro-and nanofillers depending on the applications of the composites. The fillers may be further subdivided as natural (plant fibers) or synthetic (glass fibers, CNT, etc.), different shapes (long or short length), flaky, fibrous, and spherical or disk-like [6]. The conventional addition of filler materials lowers the cost and improves the... 

Fibre-reinforced concrete is a mixture of concrete with a dispersion of discontinuous fibres. The fibres may be steel fibres, synthetic fibres (micro-synthetic or macro-synthetic), glass fibres (alkali-resistant only, AR glass fibres) or natural fibres. 

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