Casting surfaces glass

An ahoy of titanium containing 40—50% Ti and 45—50% Si is used as an additive in cast iron to shorten the graphite flakes. The effect is to provide a smooth casting surface. The resulting casting is then used to produce glass botde molds. 

Membranes cast upon glass slides also fall into the 3D surface category. Most notable are the nitrocellulose-coated FAST slides offered by Schleicher Schuell (S S) BioScience. A cytokine micro-ELISA product xmder the trade name Provision has been introduced in single-slide and 96-well spacing (64 usable wells) formats. It is called FAST Quant (Harvey, 2003). Historically, nitrocellulose membrane has been used for the sequestering of both proteins and nucleic acids. The adaptation by S S of this microporous (0.2-p pores) material cast into a microarray format has been relatively straightforward. 

The most common configuration for analytical IEF is the horizontal polyacrylamide slab gel. Gels are cast on glass plates or specially treated plastic sheets with one exposed face. They are placed on cooling platforms and run with the exposed gel face upward. Electrolyte strips, saturated with 1 N phosphoric acid at the anode and 1 N sodium hydroxide at the cathode, are placed directly on the exposed surface of the IEF gel. Contact between the... 

Figure 2.21. Surface diffraction of PHT and POT spin-cast on glass slides. The 010 reflections are absent [ill]. (Reproduced by permission of Elsevier Science Ltd.)...

SBS. The diffusion coefficient of cyclohexane at 20°C in an SBS block copolymer was measured as a function of film thickness and casting surface. Films of SBS TR-41-2443 (Shell Chemical Co., Houston, TX) were cast under identical conditions from benzene onto glass. Teflon, or previously cleaned mercury surfaces. The films were allowed to dry for a day by evaporation within a partial benzene atmosphere. The films were dried further in a vacuum dessicator for two days before being used in a sorption experiment. The properties of the copolymer are described in Table I. 

The equilibrium diffusion coefficient De for glass and Teflon cast films is identical with that of mercury cast and annealed films. This, in fact, should be expected since after stress is relieved from glass and Teflon cast films upon absorption, the polymer molecules return to their normal orientation as in the mercury cast and annealed films. Therefore, the equilibrium diffusion coefficient is the same regardless of the casting surface. 

Low angle shadowing requires that the specimen to be imaged is adsorbed to a smooth substrate. Consequently, the polyetherurethane materials were cast against the surface of a mercury puddle. This provided a surface sufficiently smooth to image individual macromolecules. The other plastic substrates were cast against glass microscope slides, and the carbon substrates vapor deposited onto the surface of freshly cleaved mica. 

Application of the PS-PDMS coating onto the PS base polymer was carried out by solution-blending base PS with small amounts of PS-PDMS products in THE Solutions were cast onto glass slides for surface energy (contact angle) measurements. These measurements were done in order to calculate surface free energy quantities, based on various model equations (Cai, 1997). Static contact angles were obtained from video capture methods with the aid of software for pixel-based calculations. Results of these measurements have been qualitatively consistent, and typically shown in Fig. 4.6.4. 

Carrier speed consistency can be affected by a number of different factors. These include improper speed reference, drive chatter and motor variability (discussed in Section 4.1), and variable tension of the carrier film. Not all casting surfaces experience all of these variables. Variable tension is not usually an error source when casting on a metal belt or on a rigid substrate such as granite or glass. Polymer... 

As a simple demonstration of the phenomenon, when poly(methyl methacrylate) is cast onto glass surfaces (normally basic), the basic poly (methyl methacrylate) has poor adhesion. When the glass surface is treated with dilute HCl, some of the surface sodium is exchanged for hydrogen, and this altered glass surface bonds to poly(methyl methacrylate) exceedingly strongly. 

T. L. St. Clair We have not studied the elongation characteristics of these adhesives. The films for infrared analyses which were cast on glass and cured to 300 C were extremely difficult to remove and in some cases actually pulled pieces of glass from the surface of the plate on which it was cast. 

Enamel film was cast and baked on the surface of a glass panel. Composition contained 200 ppm of silicone oil. Both surfaces of the film were abraded with potassium bromide powder and composition of the abraded surface was determined by FTIR. Both surfaces were composed of silicone oil but the bulk film did not have any detectable quantity of silicone oil. The top surface (interface with air) contained more oil that the bottom surface (glass). 

Different mechanical properties have been analyzed in the literature, that is, storage modulus analyzed in dynamic mechanical thermal analysis, tensile strength. Young s modulus, and toughness obtained in tensile tests. These mechanical characterizations were conducted on freestanding coatings stirred mixtures of sols and fillers were cast on glass or polypropylene plates previously surface treated with a common fabric softener and subsequently spread with a bar coater with a 500 pm gap. 

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