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Star-like structure of oligocarbonate-fluorene end-functionalized polyethylene glycol ABA triblock polymers below the gel point

Published

Author(s)

Vivek M. Prabhu, Shrinivas Venkataraman, Yi Yan Yang, James Hedrick

Abstract

Summary: ABA-type oligo fluorene-carbonate end-functionalized polyethylene glycols form micelles with star-like correlations in dilute solutions where water solvates the middle (B) poly(ethylene oxide) block. Using small-angle neutron scattering (SANS), the star-arm aggregation number and arm radius of gyration and were characterized by Benoit’s star-polymer form factor under theta-solvent conditions and by Alessandrini and Cargnano’s (1992) renormalization group theory in good solvent. Model-independent SANS Zimm plots provide the radius of gyration, micelle aggregation number, and second virial coefficient (A2) as a function of temperature. In comparison to unfunctionalized poly(ethylene oxide) A2 is consistent with predictions for self-assembling polymers below the gel point with a theta temperature of ~ 75°C.
Citation
Macromolecular Symposia

Keywords

block polymer, star-like micelle, cluster, aggregation, neutron scattering

Citation

Prabhu, V. , Venkataraman, S. , , Y. and Hedrick, J. (2015), Star-like structure of oligocarbonate-fluorene end-functionalized polyethylene glycol ABA triblock polymers below the gel point, Macromolecular Symposia, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=918244 (Accessed April 22, 2024)
Created December 17, 2015, Updated August 1, 2019