Composition-Orientation Induced Mechanical Synergy in Nanoparticle Brushes with Grafted Gradient Copolymers
Abstract
Gradient poly(methyl methacrylate/n-butyl acrylate) copolymers, P(MMA/BA), with various compositional ratios, were grafted from surface-modified silica nanoparticles (SiO2-g- PMMA-grad-PBA) via complete conversion surface-initiated activator regenerated by electron transfer (SI-ARGET) atom transfer radical polymerization (ATRP). Miniemulsion as the reaction medium effectively confined the interparticle brush coupling within micellar compartments, preventing macroscopic gelation and enabling complete conversion. Isolation of dispersed and gelled fractions revealed dispersed particle brushes to feature a higher Young’s modulus, toughness, and ultimate strain compared with those of the “gel” counterparts. Upon purification, brush nanoparticles from the dispersed phase formed uniform microstructures. Uniaxial tension testing revealed a “mechanical synergy” for copolymers with MMA/BA = 3:2 molar ratio to concurrently exhibit higher toughness and stiffness. When compared with linear analogues of similar composition, the brush nanoparticles with gradient copolymers had better mechanical properties, attributed to the synergistic effects of the combination of composition and propagation orientation, highlighting the significance of architectural design for tethered brush layers of such hybrid materials.
- Authors:
-
[1];
[2];
[1];
[1];
[1];
[2];
[1]
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Materials Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Publication Date:
- Research Org.:
- Carnegie Mellon Univ., Pittsburgh, PA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 2222967
- Alternate Identifier(s):
- OSTI ID: 2229854
- Grant/Contract Number:
- SC0018784
- Resource Type:
- Published Article
- Journal Name:
- Macromolecules
- Additional Journal Information:
- Journal Name: Macromolecules Journal Volume: 56 Journal Issue: 23; Journal ID: ISSN 0024-9297
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Copolymers; Materials; Nanoparticles; Organic compounds; Polymer particles
Citation Formats
Yin, Rongguan, Zhao, Yuqi, Jeong, Jaepil, Tarnsangpradit, Jirameth, Liu, Tong, An, So Young, Zhai, Yue, Hu, Xiaolei, Bockstaller, Michael R., and Matyjaszewski, Krzysztof. Composition-Orientation Induced Mechanical Synergy in Nanoparticle Brushes with Grafted Gradient Copolymers. United States: N. p., 2023.
Web. doi:10.1021/acs.macromol.3c01799.
Yin, Rongguan, Zhao, Yuqi, Jeong, Jaepil, Tarnsangpradit, Jirameth, Liu, Tong, An, So Young, Zhai, Yue, Hu, Xiaolei, Bockstaller, Michael R., & Matyjaszewski, Krzysztof. Composition-Orientation Induced Mechanical Synergy in Nanoparticle Brushes with Grafted Gradient Copolymers. United States. https://doi.org/10.1021/acs.macromol.3c01799
Yin, Rongguan, Zhao, Yuqi, Jeong, Jaepil, Tarnsangpradit, Jirameth, Liu, Tong, An, So Young, Zhai, Yue, Hu, Xiaolei, Bockstaller, Michael R., and Matyjaszewski, Krzysztof. Wed .
"Composition-Orientation Induced Mechanical Synergy in Nanoparticle Brushes with Grafted Gradient Copolymers". United States. https://doi.org/10.1021/acs.macromol.3c01799.
@article{osti_2222967,
title = {Composition-Orientation Induced Mechanical Synergy in Nanoparticle Brushes with Grafted Gradient Copolymers},
author = {Yin, Rongguan and Zhao, Yuqi and Jeong, Jaepil and Tarnsangpradit, Jirameth and Liu, Tong and An, So Young and Zhai, Yue and Hu, Xiaolei and Bockstaller, Michael R. and Matyjaszewski, Krzysztof},
abstractNote = {Gradient poly(methyl methacrylate/n-butyl acrylate) copolymers, P(MMA/BA), with various compositional ratios, were grafted from surface-modified silica nanoparticles (SiO2-g- PMMA-grad-PBA) via complete conversion surface-initiated activator regenerated by electron transfer (SI-ARGET) atom transfer radical polymerization (ATRP). Miniemulsion as the reaction medium effectively confined the interparticle brush coupling within micellar compartments, preventing macroscopic gelation and enabling complete conversion. Isolation of dispersed and gelled fractions revealed dispersed particle brushes to feature a higher Young’s modulus, toughness, and ultimate strain compared with those of the “gel” counterparts. Upon purification, brush nanoparticles from the dispersed phase formed uniform microstructures. Uniaxial tension testing revealed a “mechanical synergy” for copolymers with MMA/BA = 3:2 molar ratio to concurrently exhibit higher toughness and stiffness. When compared with linear analogues of similar composition, the brush nanoparticles with gradient copolymers had better mechanical properties, attributed to the synergistic effects of the combination of composition and propagation orientation, highlighting the significance of architectural design for tethered brush layers of such hybrid materials.},
doi = {10.1021/acs.macromol.3c01799},
journal = {Macromolecules},
number = 23,
volume = 56,
place = {United States},
year = {Wed Nov 29 00:00:00 EST 2023},
month = {Wed Nov 29 00:00:00 EST 2023}
}
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