Solid-state component volume fraction

Block Copolymers Two or more polymer structures linked end to end by covalent bonds are block copolymers. Due to the low entropy of mixing, seldom are two different polymers miscible. Likewise the components of a block copolymer are immiscible. In the solid state a block copolymer consists of two phases with the nanoscopic domains linked by covalent bonds and the domain sizes controlled by the sizes of the blocks. Depending on the volume fractions of the two phases, the... 

Test of time-temperature superposabillty for the dielectric P data of low-M and middle-M poly-isoprene/poly(p-feri butyl styrene) (PI/PtBS) miscible blends as indicated. In panels (a)-(d), the sample code numbers of the blends denote Kh M of the components. The reference temperature is T, = 90°C for aU blends. The solid curves indicate the e" data of bulk PI corrected for the PI volume fraction in the blends. These curves are shifted along the axis to match their peak frequency with that of the blends. (Etata taken, with permission, from Chen, Q., Y. Matsumiya, Y. Masubuchi, H. Watanabe, and T. Inoue. 2008. Component dynamics in polyisoprene/ poly(4-tert-butylstyrene) miscible blends. MacrvmoJeades 41 8694-8711 Chen, Q., Y. Matsumiya, Y. Masubuchi, H. Watanabe, and T. Inoue. 2011. Dynamics of polyisoprene-poly(p-tert-butylstyrene) diblock copolymer in disordered state. Macnmiolecules 44 1585-1602 Chen, Q., Y. Matsumiya, K. Hiramoto, and H. Watanabe. 2012. Dynamics in miscible blends of polyisoprene and poly(p-terf-butyl styrene) Thermo-rheological behavior of components. Polymer ]. 44102-114.)... 

The interrelationship between the thermodynamic state of filled polymer mixtures in a molten state and their rheological properties is firmly established and is connected with filler inffuence on the state of miscibility of two melt components. Another important factor is the surface segregation of one of the mixture component at the melt-solid interface and the formation of an adsorption shell of one component around the filler particle, increasing the apparent volume fraction of solid particles. The formation of a coagulation structural network by filler particles also depends on the state of miscibility and interaction of each component with the filler surface. All structural... 

To explore the pathway for wall-induced crystallization, we performed Monte Carlo simulations in the constant normal-pressure NPx T) ensemble. Here N refers to the number of hard-spheres in the system. The simulation box was rectangular with periodic boundary conditions in the x and y directions. In the z-direction, the system is confined by two flat, hard walls at a distance L. is the component of the pressure tensor perpendicular to the plane wall, and T is the temperature. As our unit of length we used the hard-sphere diameter a. T only sets the energy scale. In the following we always use reduced units. The state of the bulk hard-sphere system is completely specified by its volume fraction cf). The coexistence volume fractions for the bulk fluid and solid phase are known [27] [Pg.193]

The volume changes on mixing non-aqueous liquids, the densities of mixed liquids, of solutions of non-polar solutes in non-polar solvents, and the changes of total volume on the solution of solid salts in water, noticed at an early period and much investigated, can only be mentioned here some aspects of these will be dealt with later. Hyde found the densities of solutions of jp-nitrotoluene in carbon disulphide smaller than the density of either component, but the anomaly disappears if the p-nitrotoluene is supposed to be in the liquid state. Biron found that the volume change on mixing two liquids was Av=kx( —x where x , (1— ) are the mol fractions, and he investigated the effect of pressure on the value of Av. The apparent specific volume of alcohol in aqueous mixtures was determined by Brown, lo... 

For porous solids having a pore size distribution f(r), where f(r)dr is the fraction of pore volume having pore radii between r and r+dr, and if all the pores are cylindrical in shape and oriented along the direction of flow, the steady state flux based on total cross sectional area of the component 1 can be calculated from ... 

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