Molecular weights of components

Nere- Xf is the weight-average molecular weight of the blend, and Afwl is the weight-average molecular weight of component /. The steady-state creep compliance 7, of the blend is... 

Examples have been reported for several systems161,166 some results are listed in Table 16. In summary, polymer mixtures can be treated as copolymers of extreme heterogeneity in chemical composition. Under suitable conditions the techniques used in analysing data of LS from copolymer solutions can be applied to yield with good accuracy the molecular weights of components of the binary polymer mixtures. 

Destruction of protein molecules. In this case one can expect a decrease in the molecular weight of components of the protein mixture, reflected in a decrease in the intensity of bands in the high-molecular zone (closer to the start) and an increase in the relative amount of low-molecular weight components (in the proximal zone of the gel). 

There are a number of quantitative features of Eq. (14) which are important in relation to rapid diffusional transport in binary systems. The mutual diffusion coefficient is primarily dependent on four parameters, namely the frictional coefficient 21 the virial coefficients, molecular weight of component 2 and its concentration. Therefore, for polymers for which water is a good solvent (strongly positive values of the virial coefficients), the magnitude of (D22)v and its concentration dependence will be a compromise between the increasing magnitude of with concentration and the increasing value of the virial expansion with concentration. 

The compositions of mixed solvents are expressed by mole fraction (x), mass fraction (w) or volume fraction (0). If a mixed solvent consists of nA moles of solvent A and nB moles of solvent B, xA, wA and 0A for component A can be expressed by xA=nA/ nA+nB), wA=nA/(nA+nBMB/MA) and 0A = nA/(nA+ BVB/VA). Here, M is the molecular weight of component i and V the molar volume of i before mixing. It is assumed that the volume of the mixed solvent is equal to the sum of the volumes of the two constituent solvents, although some volume contraction may occur by mixing. 

WC2 lb ethane/lb mole mix (mole fraction times molecular weight of component)... 

Mass chromatography is a new form of gas chromatography that uses two gas density detectors operated in parallel and provides (a) mass of components within 1-2% relative without determination of response factors, (b) molecular weight of components within 0.25-1% in the mass range 2—400, and (c) a powerful identification tool by the combined use of retention time and molecular weight data. The theoretical basis of the technique and its scope as a molecular weight analyzer, a qualitative identification tool, and a quantitative analyzer in the polymer field are discussed. 

Mi molar mass (molecular weight) of component i V molar volume of a mixture... 

Where rj = production rate of component j in [mol/(h gcat)], F = feed mass flow rate W< = mass of catalyst w, w,f = weight fraction of component j in the outlet and feed stream, respectively, MWj = molecular weight of component j. 

T = temperature, degrees Rankine Ma, Mb = molecular weights of components A and B... 

MW- Molecular weight of component i, Lb/LbMol n Number of tubes in reactor... 

Here the term (v, - v) is called the diffusion velocity. The mass flow jj, is defined analogously. As the two chemical species interdiffiise, there is a shifting of the center of mass in the v-dircc lion if the molecular weights of components i and j differ. The flows j, and j, are measured with respect to the motion of the center of mass, and j, + jj, = 0. Molar average velocity is... 

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