Journal of Applied Polymer Science · 1996 · 46 citations · 0 references
Natural SciencesChemistryMaterials SciencePhysical ChemistryPolymer ChemistryPolymer MaterialsPolymer CharacterizationPolymer Physical ChemistryPolymer PhysicsPolymer RheologyPolymer SolutionsPolymer StructureBranching Effects On Molecular Weight DistributionDetectors For Size-exclusion ChromatographyDilute Solution PropertiesIntrinsic ViscosityPolymer Branching AnalysisRadius Of GyrationSize-exclusion Liquid ChromatographyViscosity
Randomly branched poly(methyl methacrylate) samples were prepared by copolymerization with different amounts of ethylene dimethacrylate. The molecular weight distributions, radius of gyration distributions, and intrinsic viscosity distributions were measured by size exclusion chromatography with refractive index, multiangle light-scattering, and viscosity detectors. The effect of branching on the radius of gyration was compared with the effect on the intrinsic viscosity. It was found that the intrinsic viscosity contraction factor gi scales with the radius of gyration contraction factor g, with the exponent, ϵ, having a value in the range 0.8–1.0. © 1996 John Wiley & Sons, Inc.