Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: C1.00089 : Nanocomposites Consisting of Nanoparticles with Multidentate PS Brushes Mixed with PS Matrices
Author:
In order to prevent massive phase separation of nanoparticles (NP) in a
polymer matrix, the relevant hybridization of NPs with polymer matrices has
proven to be an effective method for the high performance of nanocomposites
in applications. The surface of inorganic (gold or QD) NPs of various size
was modified with polystyrene (PS) polymer brushes,
poly(styrene)-block-poly(cysteamine methyl disulfide), by the ligand
exchange procedure. The disulfide groups in the PS brushes act as anchoring
blocks for NPs. Different PS brushes were prepared with different total
molecular weights and mole fractions of disulfide moieties. Compared with
NPs dispersed in PS without disulfide anchoring groups, NPs anchored with PS
brushes through disulfide groups were uniformly distributed within PS
matrices. The dispersion of NPs within a polymer matrix was found to be
influenced by the total molecular weight of PS brushes as well as the number
of anchoring disulfide groups. Furthermore, the effect of the ratio between
relative size of NP and the radius of gyration of a polymer brush as well as
the grafting density of PS brushes anchored onto NPs on the NP distribution
within a polymer matrix is discussed.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.C1.89
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