Polymer FractionationManfred J. R. Cantow |
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Page 258
... versus time and ( b ) an expansion plot of In r - In r ' versus time for the sedimentation of a 0.25 gm 100 ml solution of polystyrene S105 in cyclohexane at 59.780 rpm and 35 ° C . In r ' 1.79218 + 2.10927 × 105t ; ( d In r / dt ) , o ...
... versus time and ( b ) an expansion plot of In r - In r ' versus time for the sedimentation of a 0.25 gm 100 ml solution of polystyrene S105 in cyclohexane at 59.780 rpm and 35 ° C . In r ' 1.79218 + 2.10927 × 105t ; ( d In r / dt ) , o ...
Page 321
... versus om , or n ' versus D , or n ' versus am . As it is necessary to plot several orders of magnitude in both D and am to ascertain the initial as well as the final Newtonian range no and 7 , in most cases plots of log D versus log σ ...
... versus om , or n ' versus D , or n ' versus am . As it is necessary to plot several orders of magnitude in both D and am to ascertain the initial as well as the final Newtonian range no and 7 , in most cases plots of log D versus log σ ...
Page 394
... versus M on a log - log graph paper will then give a straight line . From the slope and position of the straight line the parameters y and z can be determined . Figure 11 shows 10 8 6 2 I LOG I - C ( M ) 0.8 0.6 0.4 0.25 0.1 0.08 0.06 ...
... versus M on a log - log graph paper will then give a straight line . From the slope and position of the straight line the parameters y and z can be determined . Figure 11 shows 10 8 6 2 I LOG I - C ( M ) 0.8 0.6 0.4 0.25 0.1 0.08 0.06 ...
Contents
Polydispersity of High Polymers | 3 |
Fractionation Theory | 10 |
Fractionation Efficiency | 27 |
Copyright | |
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acetone acid Acta applied average molecular weight Benzene Biochem calculated Cantow cell cellulose centrifugal Chem chemical inhomogeneity Chim chloride chromatography Claesson column components composition constant copolymers cross-linked crystalline cyclohexane density dependence Desreux determined diffusion dilute distribution curve distribution function effect elution equation equilibrium experimental Extraction Flory flow curve Giesekus gradient graft copolymer heterogeneity high polymers increasing integral distribution investigated linear liquid low molecular weight Makromol measurements Methanol methyl methacrylate mixture molecular weight distribution molecules monomer nonsolvent obtained optical parameters particles phase Phys plot polydispersity polyethylene polymer concentration Polymer Sci polymer solution polymerization polypropylene polystyrene polyvinyl acetate polyvinyl alcohol procedure ratio refractive index report of Farbenfabriken sample Section sedimentation coefficient separation shear shown in Fig solubility solvent solvent-nonsolvent species Styrene technique temperature theoretical tion titration Toluene turbidity turbidity curves ultracentrifuge values vinyl acetate viscosity volume weight fraction