Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session F17: Self-Assembled Systems
8:00 AM–11:00 AM,
Tuesday, March 15, 2022
Room: McCormick Place W-184BC
Sponsoring
Unit:
DPOLY
Chair: Dan Ye, Dow
Abstract: F17.00004 : Phase separation and anomalous domain growth in binary blends of polymer-grafted nanoparticles*
9:00 AM–9:12 AM
Presenter:
Michael R Bockstaller
(Carnegie Mellon University)
Authors:
Michael R Bockstaller
(Carnegie Mellon University)
Yue Zhai
(Carnegie Mellon University)
Wenjie Wu
(University of Houston)
Alamgir Karim
(University of Houston)
In this contribution, results on the phase separation behavior and kinetics of particle brush blends comprised of organosilica grafted with poly(methyl methacrylate) (PMMA) and poly(styrene-r-acrylonitrile) (PSAN), respectively. Two stages of domain growth are observed: a first regime that is characterized by scaling coefficient d ~ ??0.2 and a second regime featuring d ~ ??0.3 (where d denotes the domain size). Electron imaging and neutron scattering are used to verify domain growth kinetics in thin film and bulk specimen. The results are interpreted in terms of ‘anomalous growth behavior’ that has been predicted for entangled polymer blends. The results point to new opportunities for harnessing ligand interactions in brush particle systems for the fabrication of microstructured hybrid materials.
*The authors acknowledge financial support from the Department of Energy via awards DE-SC0018784 andÂ
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