Physico-mechanical testing

Meanwhile, based on another study reported by A. B. Moustafa et al [2], sandy, silty, loamy, clayey, and sandy-loamy soils were impregnated with three types of binding materials, namely, urea formaldehyde, phenol formaldehyde, and sodium silicate. Ammonium chloride, hexamethylene tetramine, and sodium fluorosilicate were used as catalysts for the previously mentioned substances, respectively. Some physico-mechanical tests were carried out with the stabilized soils and different parameters affecting the strength, absorption and durability of stabilized soils were studied [3]. 

Domkin, V, S. Electrical properties of plastic foams and methods of estimation. In Methods of physico-mechanical testing of plastic foams, pp. 48-53. Moscow NIITEKhIM 1976, (in Russian)... 

Fearon and co-workers [38] investigated the oxidative stability of multi-extruded PP using simultaneous DSC and physico-mechanical testing snch as impact strength, the melt flow index (MFI) and the yellowness index. Determination of the residual oxidative stability of a polymeric formulation during its multi-pass extrusion is of immediate relevance to polymer recycling. 

These workers sought correlation between physico-mechanical tests and DSC-chemiluminescence-based techniques using MFI and DSC-chemiluminescence with PP stabilised with different antioxidant systems. Their results suggest a strong correlation between results obtained by the two types of test. There is, however, no correlation between the yellowness index and DSC-chemiluminescence. 

R. J. Moseley, R. A. Amos and J. R. Scott, Physico-Mechanical Testing of Unvulcanized and Vulcanized Rubbers , MacLaren, London, 1962. 

Tests are made on these products to determine their value and to investigate those requisites which render them adapted to their particular uses. These tests may be reduced to three series of observations, namely, microscopic, chemical and physico-mechanical. 

This examination includes numerous technical tests and investigations made with the object of determining the physico mechanical properties of the wares. The results obtained, together with those of the microscopic and chemical examinations, indicate if the material possesses the necessary characters for the required purpose and also allow of its value being established. This examination is carried out on a sample so chosen that it represents as far as possible the whole parcel. The tests made are numerous and only a few of the more important are given shortly here further details may be found in special books on the subject.1... 

Samples were then tested accordingly to the European standards and the following physico-mechanical properties were evaluated density (EN 323), moisture content (EN 322) and IB strength (EN 319). 

The yams used in accomplishing the woven structure versions were tested in the INCDTP in accredited laboratories according to SR EN ISO/CEI 17025 2001, in order to establish the main physico-mechanic characteristics. 

For a good understanding of the fibre-matrix interface mechanics in relation to its physico-chemical properties, it is therefore necessary to determine the interface capacity to transfer the stresses from the matrix to the fibre. This is usually carried out by means of specific mechanical tests on real or model composites. The aim of the first part of this paper is to present and discuss briefly the most common micromechanical tests and theoretical approaches used nowadays for studying the mechanical behaviour of interfaces in composites. A second part will be concerned with the influence on the magnitude of the fibre-to-matrix stress transfer capacity, defined in terms of interfacial shear strength, of the interfacial adhesion between both constituents, on the one hand, and of the matrix alterations (interfacial layers) near the interface, on the other hand. 

H. Ismail, and R. Jaffri, Physico-mechanical properties of oil palm wood flour filled natural rubber composites. Polym. Test. 18(5), 381-388 (1999). 

After a detailed physicochemical characterization of the raw materials and cements considered in this study, and the performance of an ample set of physico-mechanical and chemical tests, the main conclusions regarding to the possible use of red gypsum in the fabrication of cements and mortars are the following ... 

The major physico-chemical methods used for characterization of polymer/HAp composites are microscopic techniques. X-ray diffraction, mechanical testing and... 

The physico-mechanical properties of films at a stretching (extrusion) measured in a direction by means of universal tensile machine EZ-40 (Germany) in accordance with Russian State Standard GOST-14236-71. Tests are spent on rectangular samples in width of 10 mm, and a working site of 50 mm. The speed of movement of a clip was 240 mm/min. The five parallel samples were tested. 

Proper characterization of composite interfaces, whether it is for chemical, physical or mechanical properties, is extremely difficult because most interfaces with which we are concerned are buried inside the material. Furthermore, the microscopic and often nanoscopic nature of interfaces in most useful advanced fiber composites requires the characterization and measurement techniques to be of ultrahigh magnification and resolution for sensible and accurate solutions. In addition, experiments have to be carried out in a well-controlled environment using sophisticated testing conditions (e.g. in a high vacuum chamber). There are many difficulties often encountered in the physico-chemical analyses of surfaces. 

In the present paper are presented the results of the investigation of their physico-chemical and mechanical properties, chemical stability, as well as the data on water and sulphur dioxide sorption as a function of their concentration in the gas phase. Influence of different parameters on the efficiency of absorption of SO2 from air by COg and HCOj foimofthe fibres has been tested. These parameters are gas flow rate, concentration, and air humidity. The optimal condition for regeneration has been established. It has been shown that the fibrous ion-exchange materials made of strong-base fibres are highly efficient means for removal of SO2 from air. 

As indicated above, dehydrons have unique physico-chemical properties They represent structural vulnerabilities of the protein, but they also constitute sticky spots promoting the removal of surrounding water [12-14, 19, 21], This latter property could only be established by addressing the following questions How do we effectively demonstrate that a dehydron attracts nonpolar test groups Can we measure the mechanical equivalent of its dehydration propensity ... 

Screening of non-alternants (NAH s) is much less extensive than for alternants tested parents are listed in Table 4.6. Knowledge of the carcinogenesis of NAH s could be valuable since, unlike molecules containing heteroatoms, NAH s are likely to have a similar carcinogenic mechanism to that of AH s consequently, only physico-chemical correlations which can readily include NAH s are accept-... 

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