Effects of composition on properties

Since the conditions of this test can be standardised fairly readily, it has also been used as a routine test in comparing different alloys of the same general kind in the course of studies of effects of composition on properties, as, for example, in the researches by Hanawalt, Nelson and Peloubet on the corrosion of magnesium... 

The characteristics of particulate filled polymers are determined by the properties of their components, composition, structure and interactions [2]. These four factors are equally important and their effects are interconnected. The specific surface area of the filler, for example, determines the size of the contact surface between the filler and the polymer, thus the amount of the interphase formed. Surface energetics influence structure, and also the effect of composition on properties, as well as the mode of deformation. A relevant discussion of adhesion and interaction in particulate filled polymers cannot be carried out without defining the role of all factors which influence the properties of the composite and the interrelation among them. 

Table I. Effect of Composition on Properties of Injection-Molded BDA/1,6-Hexanediol/1,4-Butanediol Polyesters...

In order to investigate interactions among the components and the effect of composition on properties of the final items, thermal, thermo-mechanical and mechanical properties of some composite films based on WG, PVA and SCB were investigated. 

Fig. 3. Effects of composition on physical properties. A, acetyl B, butyryl C, cellulose. 1, increased tensile strength, stiffness 2, decreased moisture sorption 3, increased melting point 4, increased plasticizer compatibiUty 5, increased solubiUties in polar solvents 6, increased solubiUties in nonpolar...

In addition to deciding on the method of normalization of activity coefficients, it is necessary to undertake two additional tasks first, a method is required for estimating partial molar volumes in the liquid phase, and second, a model must be chosen for the liquid mixture in order to relate y to x. Partial molar volumes were discussed in Section IV. This section gives brief attention to two models which give the effect of composition on liquid-phase thermodynamic properties. 

Prosser, H. J., Groffman, D. M. Wilson, A. D. (1982). The effect of composition on the erosion properties of calcium hydroxide cements. Journal of Dental Research, 61, 1431-5. 

Maleate/Vinyl Ether UV-Cured Coatings Effects of Composition on Curing and Properties... 

Kim, J. C Cakmak, M. and Zhou, X Effect of composition on crystalline orientation and optical properties of biaxially stretched PEN/PEI films, in Proceedings of the 55th SPE ANTEC 97 Conference, May 5-8, 1997, Toronto, ON, Canada, Society of Plastics Engineers, Brookfield, CT, 1997, Vol. 2, pp. 1588-1592. 

A Physical Chemistry Lab Project The Effect of Composition on Several Physical Properties of Binary Mixtures of Common Liquids 218... 

Interest turned to compositions of high permittivity titanates and zirconates in which one member exhibited a negative and the other a positive TC , the objective being to achieve xf = 0. The effect of composition on TC, for two such systems is shown in Fig. 5.35. Another system which attracted interest is MgTi03-CaTi03 in which the end members have the dielectric properties shown in Table 5.7. The composition Mg0 95Ca0 05TiO3 yields xf 0, er = 21 and Q = 8000 at 7 GHz. 

In conclusion, when working with blends of condensation polymers, one always has to take into account the possibility of chemical interaction and the formation of copolymers. The extent of this reaction is important because it is possible to obtain a one-component, as well as a one-phase, system when the blocky sequential order is converted to a random one. Such systems are very appropriate for the verification of relationships reflecting the effect of composition on various properties since they are free from other factors. Finally, in such cases one is dealing with copolymers distinguished by the creation of new chemical bonds, not with blends, although initially two or more homopolycondensates are mixed. 

Generally, the Mooney viscosity of S-SBR is higher than E-SBR. Thus, it accepts higher filler and oil loadings. The effect of composition on the property of S-SBR is similar to that of E-SBR. As the styrene content increases, the rolling resistance, traction, and hardness increase, while the wear resistance decreases. With the increase of vinyl content, the wet traction increases. 

The effect of composition on some physical properties of the homogeneous copolymer is plotted in Figures 3, 4, 5, and 6. The effects were determined on copolymers which had a reduced viscosity, as defined in footnote c to Table VI, of 0.8 to 0.9. This value of the reduced viscosity corresponded to the lowest molecular weight at which the polymers attained their limiting strength. It was thus a thermoplastic optimum, being the best balance between mechanical strength and viscosity in the melt. 

The purpose of our study was a rheological evaluation of the effect of composition on the properties of ABS resins in the molten state. Steady-state viscosity was determined over a wide range of temperatures and shear rates. The shear modulus in the molten state was determined by measurement of the diameter of the extrudate. ABS resins in the molten state behaved as an amorphous homophase polymer. The effect of the elastomer phase on the viscoelastic properties which characterize the behavior of the continuous matrix, i.e. monomer friction coefficient and molecular weight between entanglements (Me), was calculated by the application of the molecular theories. The significance of these properties in heterophase systems is discussed. 

OXYNITRIDE GLASSES EFFECTS OF COMPOSITION ON GLASS FORMATION AND PROPERTIES WITH IMPLICATIONS FOR HIGH TEMPERATURE BEHAVIOUR OF SILICON NITRIDE CERAMICS... 

This paper outlines the effect of composition on oxynitride glass formation and properties that crucially affect the high temperature mechanical behaviour of silicon nitride based ceramics. 

Kim, J. C., Cakmak, M. and Zhou, X., Effect of composition on orientation, optical and mechanical properties of biaxially drawn PEN and PEN/PEI blend films. Polymer, 39, 4225-4234 (1998). 

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