Physical-Mechanical Characteristics

Physical-Mechanical Properties of Waterborne CSPE Coatings 

Waterborne CSPE Vulcanized by Water Solution of Manniach Acid 

Properties Standard Resistant Anticorrosive Walls Floors Temporary 

Crack-resistance criterion of elastomeric coating is maximal width of an overlapped crack in concrete substratum at which coating ruptures. 

FIGURE 5.1 Typical tensile load-extension curve for a coating with optimal composition on concrete substrate (ASTM D412). (Reprinted from O. Figovsky, V. Karchevky, and D. Beilin, Protective Crack-Resistant Waterborne Coatings Based on Vulcanized Chlorine-Sulpho-Polyethylene, Scientific Israel Technological Advantages 3, nos. 1-2 (2001). With permission.) 

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Taking into account the ZnCFO positive influence on formation of the complex of the physical-mechanical characteristics of vulcanizates on the basis of various rubbers and theoretical preconditions about interrelation "recipe - structure - property", it was interested to define the morphology features of elastomeric compositions. With this purpose the percalation method of the analysis by the rheometer data of rubber mixes was used [10],... 

The compounds we examined in extrusion rheometer and in plastograph had the same recipe as that adopted for determining the physical-mechanical characteristics. However, extrusions were carried out with rigid compounds having an industrial recipe suitable for pipes and sections. Gelation of the dry blend, obtained by turbomixer (10 minutes at 1800 rpm, max. temp. 100°C) was carried out by two-roll mill for 10 minutes at 180°C the blank sheets were mechanically granulated. 

Table 1. Physical-mechanical characteristics of resin-bonded chipboard obtained with the use of mixture of phenol-formaldehyde resin (KF-MT) with OSR ...

Particle board with sizes 600 X 600 X 16 mm was obtained in laboratory conditions with the use of mixtures of OSR and phenol-formaldehyde resin of KF-MT brand. OSR was introduced as 17 mass % water suspension. Physical-mechanical characteristics of these... 

Summary The backgrounds for elastomer and glassy silicone compositions cured by a polyaddition mechanism have been developed. Their thermal stability as a function of basic sdoxane chain framework and change in some physical-chemical and physical-mechanical characteristics over a wide temperature range are studied. 

The surest way toward desirable new polymer structures is by a systematic exploitation of the detailed mechanistic understanding of polymerization processes. The aim of this presentation is to examine in some depth the mechanism of carbocationic polymerizations and subsequently to apply this insight toward the preparation of new polymeric materials possessing advantageous combinations of processing and/or physical-mechanical characteristics. 

The results received at research of character of influence organic phosphorus of compounds on physic-mechanical characteristics PEHD in conditions shock test (Table), allow to assert with the big share of reliability, that FOC show plasticization property, that in turn raises values of sizes of mechanical characteristics. 

FIGURE 2.8 Influence of negative temperatures on the ratio of the module of elasticity (1), ultimate compression strength (2), and ultimate deformations at compression (3) to the similar values obtained at test of control RubCon samples at room temperature. (Reprinted from Yu. Potapov, O. Figovsky, Yu. Borisov, V. Chmyhov, and D. Beilin, Influence of Temperature on Physical-Mechanical Characteristics of Polymer Concrete, J. Scientific Israel Technological Advantages 5, nos. 1-2 (2003) 11-13.)... 

Thus, decreases in the physical-mechanical characteristics of RubCon under the action of inorganic acids is caused by various speeds of chemical reactions such as corrosion, oxidation, sulfiding, chlorination, and so on. Processes of oxidation and depolymerization proceed with formation of low-molecular compounds containing hydroxyl and carboxyl groups. The process of oxidation has a branched-out character. 

The main physical-mechanical characteristics of the new composite are shown in Table 2.17. 

The Main Physical-Mechanical Characteristics of the New RubCon Structure... 

Potapov, Yu., Figovsky, O., Borisov, Yu., Chmyhov, V., and Beilin, D. Influence of Temperature on Physical-Mechanical Characteristics of Polymer Concrete, J. Scientific Israel Technological Advantages 5, no. 1-2 (2003) 11-13. 

Highly diffusive penetration of SPC can be drastically lowered by active additives that are capable of raising SPC density, and, therefore, its corrosion resistance. As indicated previously, the most effective results were obtained by introduction of FA or TFS additives. Addition of monomeric additives to silicate composition improves the physical-mechanical characteristics and chemical resistance of silicate compositions due to improvement in the quality of silicate bonds and better adhesion between the binder and coarse filler [1], In other words, the influence of the monomeric additives is conditioned by consolidation of liquid glass gel during hardening and modifications of alkaline components due to inoculation of furan radicals. 

The most important physical-mechanical characteristics of the coatings are shown in Table 5.2. Typical diagrams of the stress-strain relationship for coatings with optimal composition on concrete substratum are plotted in Figures 5.1 and 5.2. 

Physical mechanical characteristics Tensile strength [kg/cm ] Elongation [%)... 

Low specific mass, high physic-mechanical characteristics (impact viscosity, resistance to multiple bending, wear resistance), satisfactory thermal, chemical and water resistance, low resistance to frost and oxidation, good dielectric properties. 

There are more than a dozen t3rpes of preservative films [3] discriminated by the polymer base that governs the physical-mechanical characteristics of the films (Table 2.1) [1,9-11]. 

Table 2.1. Physics-mechanical characteristics of polymer films [9]... 

Hose extrusion includes forcing of the polymer melt through the annular slit of the extrusion head, pneumatic blowing of the hose, folding and removal in vertical or horizontal direction. This method produces biaxial films with perfect physical-mechanical characteristics, it is rather simple and economical, and is suitable for the production of laminated film materials by co-extrusion. 

Thus, the formation of the two-phase system by the method with PER ensures optimal values of some of the physical-mechanical characteristics. These conclusions are confirmed by the results of electron-microscopic studies. With chemical bonds between the epoxy polymers and the rubber particles, the developing crack does not pass round the rubber particle but penetrates it, which causes delocalization of stresses at the tip of the crack and results in improvement of the physical and mechanical properties of the ERC. 

For all samples defined the maintenance furacilinum, release furacilinum in water, density of samples, physical-mechanical characteristics on corresponding state standard specification, technical specifications and to laboratory techniques [6]. 

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