Monomolecular weight

Adsorption can be divided into two types. Chemical adsorption results in the formation of a monomolecular layer of the adsorbate on the surface through forces of residual valence of the surface molecules. Physical adsorpbon results from molecular condensation in the capillaries of the solid. In general, substances of the highest molecular weight are most easily adsorbed [27]. 

Shock involves motion - that of a falling weight which impacts other matter, that of two railroad trains in collision or that of the highly compressed gases in a detonation which occupy the reaction zone back of the shock zone, which impacts the next monomolecular layer of undecomposed explosive. The velocity of such motion therefore is an important factor in the shock value of the phenomenon... 

Sodium fulminate, soluble in water, has a molecular weight which corresponds8 to the simple monomolecular formula, NaONC. These facts, taken together with the fact that mercury fulminate warmed with concentrated aqueous hydrochloric acid yields hy-droxylamine and formic acid,9 prove that fulminic acid is the oxime of carbon monoxide. 

Fig. 3.5 Particle diameter distribution of monomolecular particles obtained from various molecular weight polystyrenes. (From ref. [53])...

The possibility that the compounds might be polymerization isomers has been eliminated by cryoscopic determinations of molecular weights in benzene solution, which showed both isomers to be monomolecular. Dipole moments in such solutions were found to be 9.5 D. for the cis isomer and 2.41 D. for the trans isomer. The latter is not zero since the four ethyl groups lie on the same side of the plane containing the platinum, chlorine, and sulfur atoms. Interconversion of the isomers does not occur read-... 

Saville et al.1411 studied the U.—A (surface pressure-area) isotherms at the water-air interface at 25 °C for monomolecular films of the ethereal dendrimer series (i.e., the benzylic alcohol series represented by structures 50 in Scheme 5.12). They reported a strong dependence of the isotherms on molecular weight, which compared well with that observed for hydroxyl-terminated polystyrene. 

Since the critical conditions (rcr, yCr) were reached in areas where the melt was close to the first Newtonian range, should be proportional to the zero shear viscosity of the monomolecular melt. (As a first approximation, r Y> = (MpMma/M)35 rjo, where Mpmma is the molecular weight of a PMMA block and M is the molecular weight of a polymer molecule.)... 

Organic zinc-rich primers are based on epoxy/polyamides, high-molecular-weight linear epoxies, moisture-cured urethanes, high-styrene resins, chlorinated rubbers and epoxy esters. In this type of primer zinc is covered with a monomolecular layer of the binder which facilitates the adhesion of the film to the substrate. 

Microemulsions are thermodynamically stable, clear fluids, composed of oil, water, surfactant, and sometimes co-surfactant that have been widely investigated during recent years because of their numerous practical applications. The chemical structure of surfactants may have a low molecular weight as well as being polymeric, with nonionic or ionic components [138-141]. For a water/oil-continuous (W/O) microemulsion, at low concentration of the dispersed phase, the structure consists of spherical water droplets surrounded by a monomolecular layer of surfactant molecules whose hydrophobic tails are oriented toward the continuous oil phase (see Fig. 6). When the volume fractions of oil and water are high and comparable, random bicontinuous structures are expected to form. 

Total surface area of a soil is defined as area per rmit weight of clay or soil and is expressed as (m g ). The fact that ethylene glycol formes a monomolecular layer on the clay surface,... 

The first attempts to deposit organic dielectrics as surface films onto glass substrates were stimulated by Langmuir s observation [50] that some substances of high molecular weight insoluble in water and also having polar groups spread over a water surface as a monomolecular layer could be transferred to the surface of a solid... 

It is evident from the above and the fact that racemic acid melts at a higher temperature than the d- or Z-tartaric acids that racemic acid in the solid form and its salts are not simple mixtures of the dextro and levo forms. They are, in all probability, molecular compounds which resemble the double salts that are readily decomposed into their constituents. Such decomposition takes place in the case of racemic acid when it is dissolved in water, for under these circumstances the molecular weight corresponds to that of the single molecule the esters of the acid, when vaporized, are also monomolecular. 

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