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Size Changes and Interpenetration Within Concentrated Dendrimer Solutions

Published

Author(s)

T J. Prosa, Barry J. Bauer, A Topp, Eric J. Amis, R L. Scherrenberg

Abstract

The field of dendrimer research has grown dramatically in recent years with the synthesis of new materials quickly outpacing the characterization of simple material properties.[1] The lack of dendrimers in sufficient quantities has inhibited the ability to conduct bulk material studies, but the recent availability of DAB-dend-(dend-(NH^2^)x family of dendrimers in commercial quantities has made it possible to study these material as concentrated solutions and in the bulk. [2,3] Previous studies by this laboratory have reported on the intramolecular structure of dendrimers within dilute solution [4,5] and the evolution of dendrimer structure as a function of solution concentration using small-angle neutron scattering (SANS).[6,7] We report here an extension to these earlier works. One advantage of small-angle x-ray scattering (SAXS) over SANS is the ability to better resolve high angle features because of the incoherent scattering effects present in SANS. The net result is the ability for SAXS to better resolve high angle scattering features which are indicative of the uniform sphere-like molecular ordering of the individual dendrimer molecules in solution. The observed secondary maximum is relatively unaffected by correlation effects between dendrimers in concentrated solutions and allows for a relatively unambiguous separation of average particle size and interparticle correlation effects.
Proceedings Title
Prooceedings of the Americal Society Division of Polymer Materials: Science and Engineering
Volume
79
Conference Dates
August 23-27, 1998
Conference Title
Polymeric Materials: Science and Engineering [Preprints]

Keywords

dendrimer research, small-angle neutron scattering [SANS], small-angle x-ray scattering [SAXS]

Citation

Prosa, T. , Bauer, B. , Topp, A. , Amis, E. and Scherrenberg, R. (1998), Size Changes and Interpenetration Within Concentrated Dendrimer Solutions, Prooceedings of the Americal Society Division of Polymer Materials: Science and Engineering (Accessed February 22, 2024)
Created August 1, 1998, Updated February 17, 2017