A Small-angle Study of the Solution Properties of Dendrimer-like Star Polymers
The solution properties of poly(e-caprolactone) dendritic polymers are investigated by small angle neutron scattering (SANS) techniques. Comparisons of the scattering function in the intermediate region of the SANS patterns with molecular dynamic simulations indicate that the dendritic polymers are relatively extended in their conformation. We report a decay exponent, which scales as l/{nu}, of -1.2, which suggests a conformation more extended than star polymers, approaching the case of sea urchins. Guinier plots of SANS patterns yield radius of gyration measurements R{sub g} {approx} 30{angstrom}, which increase with generation number. Modeling the scattering profiles according to a ''blob'' model yields values of the random walk persistence length <{xi}{sub E}> {approx} 10{angstrom}, which decreases with increasing polymerization generation.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 784883
- Report Number(s):
- SLAC-PUB-8378; TRN: AH200131%%595
- Resource Relation:
- Other Information: PBD: 22 Mar 2001
- Country of Publication:
- United States
- Language:
- English
Similar Records
Constitutional Isomers of Dendrimer-like Star Polymers: Design, Synthesis and Conformational and Structural Properties
Intra-molecular Structural Change of PAMAM Dendrimers in Aqueous Solutions Revealed by Small Angle Neutron Scattering