Adhesion 758 INDEX

The above results suggest a potential for utilizing surface fluorinated plastics for modified atmosphere and vacuum packaging applications. If needed, the barrier properties can be improved further by vacuum metalization. Excellent adhesion was found for vacuum-deposited aluminum on this new fluorinated layer, achieving an adhesion index of 10 using the classical cross-hatch method. With this treatment method it was also possible to heat-seal PP or PE onto PET. 

By plotting the percentage of carbon particles separated from the vulcanizate versus the stress applied to the sample during extension, Hess et al. determined the stress at which the arbitrary quantity of 20% of the black had been separated from the matrix. This stress was indicated as the adhesion index. It appears (Fig. 12) that blacks of higher structures are associated with an increase of the adhesion index, i.e., with an enhancement of filler-elastomer interactions. 

It appears from the evolution of the adhesion index that a distinction has to be made between the interactions carbon blacks are able to have with unsaturated or with saturated (or near-to-saturated) elastomers. Thus, the adhesion index of butyl rubber is enhanced upon oxidation of the black, while the reverse is observed with polybutadiene 38). The improvement of the reinforcing ability of carbon black upon oxidation, in the former case, has been interpreted by Gessler 401 as due to chemical interactions of butyl rubber with active functional groups on the solid surface. Gessler, relating the reinforcing characteristics of the oxidized carbon black for butyl rubber to the presence of carboxyl groups on the surface of the filler, postulated a cationic... 

Documented effects In experiments on animals, the total saponins isolated from the roots and the preparation Zongorozid caused a significant decrease in arterial pressure, increased resistance to hypoxia, and had sedative effects. In experiments with dogs, the preparation Zongorozid increased the sodium in erythrocytes and reduced potassium in blood plasma as well as in erythrocytes. A one time dose of the preparation has blood coagulating effects but multiple applications, over 5-7 days, have better effects. The effects include an increase in tolerance to heparin, reduction of prothrombin time and fibrinolytic activity, increase in fibrinogen content (up to 45 %), and an iuCTease of the adhesion index with an increase in blood coagulation potential (Alimbaeva et al. 1986). 

E. P. McGuire, ed., American Adhesive Index, Padric Pub. Co., Bernardsville, New Jersey... 

Yoo = extreme adhesion index, r" = spore radius) of microorganisms on the surface of polyethylene as a function of temperature, humidity, and microorganism type... 

Figure 10 shows the dependence of the adhesion index of Aspergillus niger spores on time at constant humidity and different temperatures. Table... 

The adhesiveness of masa can be rapidly evaluated with a mechanical stickiness device consisting of two rectangular bars in a parallel arrangement. A block of masa is formed between the bars and partially split with a cutter, and the adhesiveness is measured by raising the movable bar until the masa detaches from it. The degree of adhesion of masa to the upper bar gives an adhesiveness index (Ramirez-Wong et al. 1993). 

Concurrent bombardment during film growth affects film properties such as the film—substrate adhesion, density, surface area, porosity, surface coverage, residual film stress, index of refraction, and electrical resistivity. In reactive ion plating, the use of concurrent bombardment allows the deposition of stoichiometric, high density films of compounds such as TiN, ZrN, and Zr02 at low substrate temperatures. 

Ethyl Vinyl Ether. The addition of ethanol to acetylene gives ethyl vinyl ether [104-92-2] (351—355). The vapor-phase reaction is generally mn at 1.38—2.07 MPa (13.6—20.4 atm) and temperatures of 160—180°C with alkaline catalysts such as potassium hydroxide and potassium ethoxide. High molecular weight polymers of ethyl vinyl ether are used for pressure-sensitive adhesives, viscosity-index improvers, coatings and films lower molecular weight polymers are plasticizers and resin modifiers. 

Poly(vinyl acetate) is too soft and shows excessive cold flow for use in moulded plastics. This is no doubt associated with the fact that the glass transition temperature of 28°C is little above the usual ambient temperatures and in fact in many places at various times the glass temperature may be the lower. It has a density of 1.19 g/cm and a refractive index of 1.47. Commercial polymers are atactic and, since they do not crystallise, transparent (if free from emulsifier). They are successfully used in emulsion paints, as adhesives for textiles, paper and wood, as a sizing material and as a permanent starch . A number of grades are supplied by manufacturers which differ in molecular weight and in the nature of comonomers (e.g. vinyl maleate) which are commonly used (see Section 14.4.4)... 

There are some aspects in the raw dry NR grades for adhesive manufacturing to be considered. NR tends to suffer oxidative degradation catalyzed by metals (mainly copper). The susceptibility of NR to oxidation can be measured using the plasticity retention index. The better grades of rubber have the higher plasticity retention index. 

Tables Sedimentation coefficient ratio. (Scomplex (Based on data from [138,140,143,145]) /Smucin) as an index of adhesiveness...

---