Gaussian effective interaction between flexible dendrimers of fourth generation: A theoretical and experimental study
Abstract
We propose a theory for the effective interaction between soft dendritic molecules that is based on the shape of the monomer density profile of the macromolecules at infinite dilutions. By applying Flory-type arguments and making use of the experimentally measured density profiles, we derive a Gaussian effective interaction whose parameters are determined by the size and monomer number of the dendrimers that are derived from small-angle neutron scattering (SANS) measurements. By applying this theory to concentrated dendrimer solutions we calculate theoretical structure factors and compare them with experimental ones, derived from a detailed analysis of SANS-data. We find very good agreement between theory and experiment below the overlap concentration, where drastic shape deformations of the dendrimers are absent.
- Publication:
-
Journal of Chemical Physics
- Pub Date:
- July 2002
- DOI:
- 10.1063/1.1486209
- Bibcode:
- 2002JChPh.117.1869L
- Keywords:
-
- neutron diffraction;
- dendrites;
- molecule-neutron collisions;
- liquid structure;
- macromolecules;
- Collisions;
- Macromolecules;
- Molecules;
- Neutron Diffraction;
- Neutrons;
- 61.25.-f;
- Solid-State Physics;
- Studies of specific liquid structures