Weight, molecular viscosity-average

Fig. 9. Rotational relaxation time as a function of molecular weight (viscosity average) for fluorescein conjugates of polyacrylamide in dilute aqueous solutions. Filled circle represents the value of for free dye (recalculated from Fig. 5 of ref. 11, using the directly measured lifetime t)...

Number-average molecular weight. Viscosity-average molecular weight. 

N umerical simulations of reactor start-up were programmed, predicting monomer and initiator concentrations, total polymer concentration, weight and number average molecular weights, viscosity and population density distribution dynamics. The following two relationships obtained from steady state observations were utilized in the simulation. 

Type of PEG (nominal average molecular weight) Viscosity (kinematic) [mmVs (cSl)]... 

Each of these groups of phases includes the numerous items of various trade names, different average molecular weights, viscosity, thermal stability, and so forth, but all of them are very close to each other by polarity. Up to the middle of the 1970s, the preferred nonpolar phase was squalane (isoprenoid alkane C30H62). This phase is no longer used because of its low thermal stability (only about 110°C). However, this obsolete phase maintains its importance as a nonpolar standard in gas chromatography. Other phases may be characterized by differences of RI values of specially selected test compounds between the phase under consideration and squalane, for example ... 

TABLE 6.5 Average molecular weight (number-average, weight-average, and viscosity-average) of deck boards—freshly extruded and annealed at 200°F... 

FIGURE 3.31 Experimental slurry viscosity with surfactants of different molecular weights (a) average slurry viscosity as a function of the surfactant concentration and molecular weight, and (b) intrinsic viscosity calculated from eqs. 1 and 2. 

An average molecular mass (viscosity average) An average molecular mass (number average) Molecular dimensions and an average molecular mass (weight average) Molecular mass distribution... 

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