Physico-mechanical characteristics of the

From the table it is seen that the enhanced energy interactions between the polymeric coat of the filler and the matrix does not always entail an upgraded complex of physico-mechanical characteristics of the composite. The authors of [210] have advanced an opinion that the enhanced filler-matrix interaction prevents formation of labile bonds between the two and hinders the relaxation processes at the interphases. 

The physico-mechanical characteristics of the soil determine directly its technological properties. They depend particularly on the grain-size, moisture, structure, and also on the human content and cationic composition of the soil colloidal complex. The most important technological characteristics of the soil are as follows ... 

The physico-mechanic characteristics of the yams used in structure are given in Table 1, data of woven structure designing are given in Table 2, and the programming charts are given in Figs. 1 and 2. 

Knowledge of the mechanism of action and investigations on the physico-chemical characteristics of the therapeutically used dalbaheptides has stimulated the transformation of natural antibiotics into new derivatives using both chemical and biosynthetic modification. 

The behavior of the physico-mechanical characteristics of polymeric composites is easily traceable in the table given in [144] which presents the results of experiments with polyamide matrices filled with resite particles of different shape. The filler concentrations were adjusted so that the integral contact surface area in the filler-matrix system remained the same. 

Different characteristics of solvents seriously affect the sol-gel reaction in solution. This in turn influences the physico-mechanical properties of the resultant rubber-silica hybrid composites. Bandyopadhyay et al. [34,35] have carried out extensive research on stmcture-property correlation in sol-gel-derived rubber-sihca hybrid nanocomposites in different solvents with both chemically interactive (ENR) and noninteractive (ACM) mbber matrices. Figure 3.12 demonstrates the morphology of representative ACM-sihca and ENR-sihca hybrid composites prepared from various solvents. In all the instances, the concentration of TEOS (45 wt%), TEOS/H2O mole ratio (1 2), pH (1.5), and the gelling temperature (ambient condition) were kept unchanged. 

Table 1 presents as an example the experimental dependences of kinetic parameters of the reaction, structural parameters of the network and some physico-mechanical characteristics on the molar fraction of monofunctional molecules in the reactant mixture, which is specific of FTD in the given case. As can be seen, the presence of monofunctional molecules, even in minor amounts (only 3-10%), exerts a strong influence on the kinetic and physico-mechanical parameters. 

The modification of the Ni Al alloy by addition of molybdenum or chromium has a significant effect on the properties of the Raney nickel catalyst in the reaction of hydrogenation of valeronitrile. In the case of molybdenum, the catalytic properties may be correlated to the physico-chemical characteristics of the catalysts. Chromium is an effective promoter for initial activity and for selectivity. The mechanism for promotion of chromium in Raney nickel is not known exactly. 

Studies of the moisture absorption (hygroscopicity) and water absorption (hydro-scopicity) of gas-filled plastics are of considerable practical importance, since foamed polymers always contain moisture (with the exception of their use in space or under extremely rare conditions on Earth) n4iich noticeably affects all physico-mechanical characteristic of materials, in particular electrical and heat insulation properties. 

Characteristics of titania/silica obtained by consecutive precursor - oxygen cycles Physico-chemical characteristics of the titania/silica samples and silica and titania supports are collected in Table 2. The samples are labelled xTiSi (x = precursor - oxygen cycle number) or mix-TiSi (mechanical mixture sample). 

A more economical method of making hf structures involves electrochemical deposition from molten salts of a thick niobium layer of a sufficiently high mechanical strength onto a matrix reproducing the inner surface of the article followed by removing the matrix [2,3]. The aim of this work is investigation of physico-mechanical characteristics of niobium coatings obtained by electrodeposition to evaluate the hf superconductivity of the articles which can be made on their basis. 

The use of these amines guarantees invariability of the physico-mechanical characteristics during the treatment of polyolefins in air at temperatures up to 250°C. 

The physico-chemical characteristics of the waste packages are important. For exan q)le, mechanical properties may determine the stability of the repository or the nature of the conditioning materials may have consequences on the chemical stability of some forms of the radionuclides. Then, specific gravity, homogeneity, packing fraction, chemical composition, solubili should be evaluated. 

The influence played by antistatic agents on the specific surface resistivity, as well as on the physico-mechanical characteristics of TPO, is presented in Tables 3-7 [25]. 

Many of the properties of the cement paste are determined by its chemical nature and micro structure. Microstructure constitutes the nature of the solid body and that of the non-solid portion, viz., porous structure. Microstructural features depend on many factors, such as the physical and chemical nature of the cement, type and the amoimt of admixture added to it, temperature and period of hydration, and the initial w/c ratio. The solid phase study includes examination of the morphology (shape and size), bonding ofthe surfaces, surface area, and density. Porosity, pore shape, and pore size distribution analysis is necessary for investigating the non-solid phase. Many of the properties are interdependent, and no one property can adequately explain the physico-mechanical characteristics of cement paste. 

For composites with polymerization-modified filler it is typical that the physico-mechanical characteristics should increase symbatically with the quantity of polymer which becomes attached to the filler in the polymerization process. This effect has been observed for polyethylene [293, 321], poly(vinyl chloride) coats [316], and in [336, 337] for kaolin coated with poly(vinyl acetate) and introduced into the copolymer of ethylene and vinyl acetate. 

The introduction of large gas phase volumes into the polymer alters the physical characteristics of the material volume weight, permeability to fluids and gases, and physico-mechanical properties. Moreover, the properties of the polymer matrix itself are changed (owing to orientation effects, supermolecular structure of the polymer in the walls, ribs and tension bars of cells), which drives up the value of specific strength on impact, and results in anisotropy of elasticity. 

The mechanical behaviour of a two-phase composite system depends partly on the filler characteristics, such as the geometry of inclusions, their size, the size distribution, the orientation of inclusions, the filler volume-fraction, the relative positions between the inclusions, the physical state of the filler, etc. and partly on the matrix characteristics, which are related to the physico-chemical state of the matrix, the degree of its polymerization, the crystallinity, the degree of cross-linking, etc. 

The rate at which selected liquids penetrate into tablets can be used to study their pore structure. A knowledge of the rate of liquid penetration should also provide information on the disintegration/dissolution behavior of a tablet on administration. Such investigations are capable of forming a valuable link between physico-mechanical characteristics and in vivo performance. 

Relationship between physico-chemical properties of the crystallization medium ( Ni-Mn-Ga-C and Ni-Mn-Si-C systems) and physico-mechanical, physico-chemical properties and performance characteristics of synthesized diamond powders. 

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