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 26, 2024)
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Star-like structure of oligocarbonate-fluorene end-functionalized polyethylene glycol ABA triblock polymers below the gel point
Published
Author(s)
, 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 Benoits star-polymer form factor under theta-solvent conditions and by Alessandrini and Cargnanos (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
Pub Type
Journals
Download Paper
Keywords
block polymer, star-like micelle, cluster, aggregation, neutron scattering
Citation
Created December 17, 2015, Updated August 1, 2019