Molecular weight curve

Fig.1.7 Iso-molecular weight curves showing the influence of molecular size on membrane permeability with increasing lipophilicity [32].

The polyethylene linewidths, as illustrated in Fig. 1, clearly indicate that a constant value is attained in the melt between 1-8 X 10. Proton T2 measurements at 150°C indicate that there is a change in slope in this quantity as a function of molecular weight at about = 6 x 10. ( ) The critical molecular weight as determined from bulk viscosity measurements for this polymer has been given as 2 x 10 ( ) and 3.8 x 10. (5 ) These values are very close to those which would be deduced from the linewidth measurements. For polydimethyl siloxane the break in the proton T2-molecular weight curve occurs at about M = 5 x 10. (37) is about 2.5 x 10 from viscosity measurements. ( ) Fig. 5... 

Fig. 8.16. Superimposed plots of y(y)M0 and J(y)/J° as functions of shear rate for poly( -methyl styrene) solutions (199). Curve A is for data at low concentrations and molecular weights curve B is for data at high concentrations and molecular weights. Data have been shifted along the shear rate axis to produre superposition. [Reproduced from Macromolecules 5,791 (1972).]...

Using the PMMA direct molecular weight calibration curve shown in Figure 4 and the Mark-Houwink parameters for PMMA in TFE shown in Equations 26 and 27, an HDV calibration curve can be constructed as described in the theory section. Then secondary molecular weight curves can be constructed for other polymers of interest by the methods discussed in the theory section as was done in Ref. 1, using the indirect PMMA molecular weight calibration curve. 

FIGURE 5.41 HPAM adsorption on calcium-montmorillonite (25°C). Molecular weight curve 1, 6 million curve 2, 9 million curve 3, 10 million and curve 4, 15 million. Source Yang et al. (2002a). 

Fig. 16.2. Three component diagrams at 25 °C for polystyrene microgel particles (M) in ethylbenzene (S) in the presence of free polystyrene (P) (a) free polystyrene of various molecular weights curves 1, 1 800 2, 18 000 3, 2 x lO (b) different particle sizes curves 1, 520 nm 2, 460 nm 3, 403 nm (after Clarke and Vincent, 1981b).

Fig. 16.4. The reciprocal of the stability ratio of poly(oxyethylene) stabilized latex particles in the presence of free poly(oxyethylene) of different molecular weights curves 1,300000 2,10000 3, 4 000 4, 600 5, 200 (after Cowell et al., 1978).

It is difficult to pick the 90% point on the S-shaped retention vs. molecular weight curve. 

Fig. 5. Decay of DF and phosphorescence for P2VN of low molecular weight (curves a) and higher molecular weight (curves b). Note that the ordinants are different for DF and phosphorescence (from ref. 19).

PROPERTIES AND USES OF TACKIFIER RESINS A typical plot of the softening point-molecular weight curve for... 

Fig. 22. Universal mobility versus molecular weight curves for different reduced pulse times (field angle = 110°). Values of the reduced pulse time, t/t. are indicated on the curves...

Step 9 In this case, we have TBP curve, bulk density and light end composition. Therefore, we use these three properties to build the assay in Aspen HYSYS Petroleum Refining. Users are allowed to input molecular weight curve, density curve and viscosity curve if available. 

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