Polymer weight fraction

Figure 4. Entrance region polymer weight fraction (relative to value at the tube centerline) profiles in the tube cross section for a zeroth order reaction and uniform viscosity at GrSc = 10 and = 0.05 and 0.1.

Fig. 19. Polymer weight fraction as a function of hydrodynamic radius Rh for the TDFRS measurement in Fig. 16 with Tp = 1.5 s...

Fig. 10. SANS from deuterated polystyrene (Mw = 1.95 x 106 g/mol) in dioctyl phthalate solution (3% polymer weight fraction). Experimental data (arbitrary units) and results of the fit to the inverse Zimm formula are plotted...

Figure 10. Comparison of exiting polymer weight fraction profiles as the optimal two-zone wall temperatures are approached.

When the density of the primary particle, the polymer weight fraction of this particle and the molecular weight of a polymer are given by p, C and M, respectively, the number of polymer molecules In this particle, N, can be calculated by using Equation 1. 

FIGURE 16.12 Cloud-point curve of polypropylene (PP)-n-pentane-C02 for various COj contents. Initial polymer weight fraction Wpp= 0.03 (before the addition of COj). Comparison of experimental cloud points to PC-SAFT calculations (PP-n-pentane 0.0137, PP-CO2 0.177, -pentane-C02 kij= 0.143). (From... 

Below temperature TB (cloud point for low polymer concentrations) and at a polymer weight fraction lower than wB, isotropic solutions are stable. Above the weight fraction wA and at a temperature below the line AD (clouds points for concentrated polymer concentrations) pure cholesteric phase separates. All other compositions are biphasic, the liquid crystals being in equilibrium with a dilute isotropic solution. At low temperature this domain exists in the small concentration range delimited by wA and wB. Note that TA may be below body or even room temperature. 

This is amorphous material hindered to such a degree by the crystalline fraction that it behaves rigid [12, 13]. Assuming that a ACp-step at Tg of 0.115 J/g.C corresponds with a polymer weight fraction of 0.14, the extent of the possible rigid amorphous phase in PK terpolymer can be estimated. The sum of x(c), x(a) and x(r,a) is 1.00, thus might hold for PK terpolymer (after recrystallisation from the melt) ... 

The first polystyreneA>lock copolymer IPNs were described by Sperling (14-16) and it was shown that the general phase-separated form of the block copolymer is preserved although domains will swell depending on interfacial tension, cross-link density and polymer weight fraction. 

Figure 10.13 Comparison between experimental and calculated cloud-point pressures [38] for the system ethylene -f poly(ethylene-co-methyl acrylate), where the polymer weight fraction is 0.05.

Results of structure evolution for the one-dimensional PS/cyclohexanol system are shown in the subsequent figures. Figures 1.4.4(a-e) show structure evolution results for an almost symmetric composition profile system whereby the overall composition (polymer weight fraction), Co=0.10. This means that the composition profile that originally starts at the overall polymer weight fraction of 0.10 would have to travel almost equal weight fractions to reach both polymer-rich... 

Fig. 1.4.4(c) Polymer weight fraction (c) profile during the early-stage spinodal decomposition of a symmetric PS/cyclohexanol system (Co=0.10)... 

Two-dimensional (Chen et al 1993) and three-dimensional simulations have also been done for the binary PMMA/sulfolane system at 30" C and overall polymer weight fraction, Co=0.10. For this system, the one-dimensional simulation... 

What about the values of a and pi These values are obtained from Eq. (2.2.7) if the quasi-steady-state kinetics is assumed (Eq. 2.2.5). Alternately, polymerization rate could be assumed to be solely based on the propagation reaction. In both approaches, the start of the calculation is the determination of the temperature-polymer weight fraction relationship from the phase diagram. An approximate picture of this is shown in Fig. 2.5.1 (basal ternary diagram in Fig. 2.1.11), which follows the reaction trajectory in a representative ternary phase diagram. 

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