Die Makromolekulare Chemie · 1986 · 11 citations · 10 references
Natural SciencesChemical EngineeringChemistryPolymer ChemistryPolymer MaterialsRheologyPolymer CharacterizationPolymer MorphologyPolymer Physical ChemistryPolymer PhysicsPolymer RheologyPolymer StructureAnionic PolymerizationConcentrationDiffusion CoefficientsFrictionLinear PolymersPolymer Coil ConformationPolymer Molecular CharacteristicsPolystyrene
Abstract Based on the ratio between the intrinsic viscosities of ring‐shaped and linear polymers [η] (R) /[η] (L) , the relationships are deduced between the corresponding equivalent radii of coils r eq.(R) / r eq.(L) , sedimentation coefficients at zero concentration S 0(R) / S 0(L) , diffusion coefficients at zero concentration D 0(R) / D 0(L) , friction coefficients F (R) / F (L) , molecular weights from Svedberg's equation M SD (R) / M SD (L) , and Flory‐Krigbaum‐Mandelkern‐Scheraga invariant β (R) /β (L) . The experimental verification has been conducted with ring‐shaped polystyrene samples obtained by anionic polymerization of styrene with sodium naphthalene (sodium dihydronaphthylide) according to the multistep reaction of Hild, Kohler and Rempp.
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Synthesis of ring-shaped macromolecules
G. Hild, Paul Rempp · European Polymer Journal · 1980 · 151 citations