Polymer FractionationManfred J. R. Cantow |
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Page 44
... nonsolvent , with a large x value , will cause the x value of the system to successively exceed the x . value for ... nonsolvent , added at the beginning of the procedure , is increased by gradually expelling the more volatile solvent ...
... nonsolvent , with a large x value , will cause the x value of the system to successively exceed the x . value for ... nonsolvent , added at the beginning of the procedure , is increased by gradually expelling the more volatile solvent ...
Page 49
... solvent for cellulose nitrate to study the molecular distribution in parent cellulose samples [ 16 ] . Certainly , it is difficult to dissolve the samples in poor solvents , or in solvent - nonsolvent mixtures . However , if a good solvent ...
... solvent for cellulose nitrate to study the molecular distribution in parent cellulose samples [ 16 ] . Certainly , it is difficult to dissolve the samples in poor solvents , or in solvent - nonsolvent mixtures . However , if a good solvent ...
Page 107
... NONSOLVENT - SOLVENT PAIR AND GRADIENT A wide variety of nonsolvent - solvent systems has been used for frac ... non- solvent - solvent combinations . A dilute solution , about 0.5 gm polymer per 100 ml , is prepared using a known “ good ...
... NONSOLVENT - SOLVENT PAIR AND GRADIENT A wide variety of nonsolvent - solvent systems has been used for frac ... non- solvent - solvent combinations . A dilute solution , about 0.5 gm polymer per 100 ml , is prepared using a known “ good ...
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