Blends drawn

All neutralizing amines employed in water treatment formulations are based on single amine type or blends, drawn from this commercial stockpile. Unfortunately, they are not all drawn from a common class of amines, simply with progressively higher molecular weight or additional radical groups added instead they are drawn from a wide range of classes. For example,... 

Figure 10. SEM micrographs of the fractured surfaces of Ultem/Vectra (70/30) blends drawn in the Gist zone with various draw ratios, (a) D.R. = 1.8. Continued on next page.

FIGURE 22.10 Scanning electron micrographs of ultrahigh molecular weight PHB/PLLA blends drawn to five times after alkaline treatment at various blend ratios of (a) 7/3, (b) 5/5, and (c) 3/7. Top and bottom columns represent the surface and cross section of each sample, respectively. Reprinted with permission from Ref. 45. Copyright 2004, American Chemical Society. 

Figure 8.32 Schematic melting thermogram of a binary linear polyethylene blend. Drawn after data presented by Rego-Lopez ei al (1988).

Controlling the electrical conductivity through carbon black localization in thermoplastic blends. (Drawn using data from F. Gubbels, E. Vanlathem, R. Jerome, R. Deltour, Ph. Teyssie. 2 International Conference on Carbon Black, Mulhouse, France, Sept. 27-30,1993,397.)... 

AH synthetic fibers are produced as continuous filaments, either as yams or tows. Yams are fine enough to be woven or knitted direcdy, but caimot be intimately blended with other fibers on the principal conversion systems used for cotton or wool. For these processes, staple fibers, made by cutting the much larger tows into short lengths, are needed. Tows can also be stretch broken into sHvers or tops, which can then be drawn out and twisted into spun-yams. 

Types of internal enamel for food containers include oleoresins, vinyl, acryflc, phenoHc, and epoxy—phenoHc. Historically can lacquers were based on oleoresinous products. PhenoHc resins have limited flexibiHty and high bake requirements, but are used on three-piece cans where flexibiHty is not required. Vinyl coatings are based on copolymers of vinyl chloride and vinyl acetate dissolved in ketonic solvents. These can be blended with alkyd, epoxy, and phenoHc resins to enhance performance. FlexibiHty allows them to be used for caps and closures as weU as drawn cans. Their principal disadvantage is high sensitivity to heat and retorting processes this restricts their appHcation to cans which are hot filled, and to beer and beverage products. 

Heliotropin melts at 37°, but its perfume is injured by exposure to a temperature several degrees below this, and it should always be stored in cool dark places. In very hot weather the stock may with advantage be kept dissolved in alcohol, ready for use. Its perfume is a powerful heliotrope odour, and is improved by blending it with a little coumarin or vanillin, or with bergamot, lemon, or neroli oil. Attention should be drawn to the fact that the fancy perfumes whose names resemble heliotrope are usually mixtures of heliotropin—the cheaper ones being chiefly acetanilide, the more expensive ones containing vanillin or coumarin. 

The melt blends exhibited the best mechanical properties, which could be still further improved with additional drawing. The composites Hel-He4 could not be drawn to improve the mechanical properties. In the case of the melt blends, even higher draw ratios than used in this study will increase the fibrillation and orientation of the LCP phase leading to significant improvements in strength and modulus [21,30]. 

Table 5 compares the tensile properties of Vectra A950 in the form of dispersed fibers and droplets in the matrix by injection molding, microfibril by extrusion and drawing [28], injection molded pure thick sample and pure thin sample, and the pure drawn strand [28]. As exhibited, our calculated fiber modulus with its average of 24 GPa is much higher than that of the thick and thin pure TLCP samples injection molded. It can be explained that in cases of pure TLCP samples the material may only be fibrillated in a very thin skin layer owing to the excellent flow behavior in comparison with that in the blends. However, this modulus value is lower than that of the extruded and drawn pure strand. This can be... 

Figure 5-36B. Illustration of jet mixing for blending of oils by circulation within the tank. Oil from the top is drawn down and entrains the oil in the bottom of the tank through the eductor nozzle Get). By permission, Ketema, Schutte and Koerting Div.

Figure 4.34. NRA depth profile of the dPS 1.95M/hPS 1.95 M polymer blend (filled squares). The drawn line is the caculated profile. (Reproduced by permission of Zink et al. 1998.)...

The codes and standards are drawn up by committees of engineers experienced in vessel design and manufacturing techniques, and are a blend of theory, experiment and experience. They are periodically reviewed, and revisions issued to keep abreast of developments in design, stress analysis, fabrication and testing. The latest version of the appropriate national code or standard should always be consulted before undertaking the design of any pressure vessel. 

Fig.66 Phase diagrams of a symmetric (peo = 0.51, Mn = 2700, Mw/Mn = 1.10) and b asymmetric (0peo = 0.32, Mn = 2100, Mw/Mn = 1.14) PEO-fc-PEP block copolymers blended with epoxy resin. Phase transitions which originate from swelling of PEO chains with epoxy and/or curing agent are drawn as single lines, without implication that there are no coexistence regions. From [197]. Copyright 2001 Wiley...

Liberated gasses are drawn off at the top of the tower with the naptha. The gas is recovered to manufacture refrigerated liquefied petroleum gas (LPG). The naptha is condensed at a temperature of about 52 °C (125 °F). Part of the condensed naptha is normally returned to the top of the tower. The naptha product stream is split into light naptha for gasoline blending and heavy naptha for further reforming. Inside the tower, kerosene is withdrawn at a temperature of about 149 °C (300 °F). Diesel is withdrawn at a temperature of 260 °C (500 °F). These middle distillates are usually brought up to specification with respect to sulfur content with hydrodesulfurization. The heavy oil... 

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