Controlling Toughness of Polymer-grafted Nanoparticle Composites for Impact Mitigation

Soft Matter ◽  
2022 ◽  
Author(s):  
Shawn H. Chen ◽  
Amanda J. Souna ◽  
Stephan Jeffrey Stranick ◽  
Mayank Jhalaria ◽  
Sanat Kumar ◽  
...  
Keyword(s):  
Unit Volume ◽  
Polymer Network ◽  
New Paradigm ◽  
Load Bearing ◽  
Topological Constraints ◽  
Impact Mitigation ◽  
Entangled Polymer ◽  
Grafted Nanoparticle ◽  
Nanoparticle Composites

Toughness in an entangled polymer network is typically controlled by the number of load-bearing topological constraints per unit volume. In this work, we demonstrate a new paradigm for controlling toughness...

scholarly journals Hydrogel-Silver Nanoparticle Composites for Biomedical Applications

2020 ◽  
Vol 65 (5) ◽  
pp. 446
Author(s):  
O. Nadtoka ◽  
N. Kutsevol ◽  
T. Bezugla ◽  
P. Virych ◽  
A. Naumenko
Keyword(s):  
Silver Nanoparticle ◽  
Biomedical Applications ◽  
Polymer Network ◽  
Cross Linking ◽  
Polyacrylamide Hydrogels ◽  
Photochemical Generation ◽  
Vis Spectroscopy ◽  
Swelling Capacity ◽  
Swelling Studies ◽  
Nanoparticle Composites

Polyacrylamide and dextran-graft-polyacrylamide hydrogels are prepared and used as nanoreactors and networks for the synthesis of silver nanoparticles (AgNPs). Photochemical generation of AgNPs is carried out under UV-irradiation of Ag+ ions in swollen hydrogels of different cross-linking densities. The obtained hydrogels and hydrogel/AgNPs composites are characterized by TEM, FTIR, and UV–Vis spectroscopy. Swelling studies have shown a relationship between the structure of the hydrogels and their ability to swell. It is shown that the presence of AgNPs in the polymer network leads to a decrease of the swelling capacity. An increase in the cross-linking density leads to an expansion of the AgNPs size distribution for both types of hydrogels. All synthesized hydrogel-silver nanoparticle composites have shown a high activity in the growth retardation of Staphylococcus aureus microorganisms.

scholarly journals Structure of entangled polymer network from primitive chain network simulations

2010 ◽  
Vol 132 (13) ◽  
pp. 134902 ◽  
Author(s):  
Yuichi Masubuchi ◽  
Takashi Uneyama ◽  
Hiroshi Watanabe ◽  
Giovanni Ianniruberto ◽  
Francesco Greco ◽  
...  
Keyword(s):  
Polymer Network ◽  
Network Simulations ◽  
Entangled Polymer

The effect of topological constraints on polymer network pressure

1997 ◽  
Vol 35 (11) ◽  
pp. 1833-1841 ◽  
Author(s):  
Ilya Ladyzhinski ◽  
Ory Ramon ◽  
Shimon Mizrahi ◽  
I. J. Kopelman ◽  
Yachin Cohen
Keyword(s):  
Polymer Network ◽  
Topological Constraints

scholarly journals Mechanical properties of polymer grafted nanoparticle composites

2018 ◽  
Vol 4 (4) ◽  
pp. 244-252 ◽  
Author(s):  
Marissa Giovino ◽  
Julia Pribyl ◽  
Brian Benicewicz ◽  
Ronald Bucinell ◽  
Linda Schadler
Keyword(s):  
Mechanical Properties ◽  
Grafted Nanoparticle ◽  
Nanoparticle Composites

Segmental Dynamics in PMMA-Grafted Nanoparticle Composites

2010 ◽  
Vol 43 (19) ◽  
pp. 8275-8281 ◽  
Author(s):  
Pinar Akcora ◽  
Sanat K. Kumar ◽  
Victoria García Sakai ◽  
Yu Li ◽  
Brian C. Benicewicz ◽  
...  
Keyword(s):  
Segmental Dynamics ◽  
Grafted Nanoparticle ◽  
Nanoparticle Composites

Structure, dynamics and primitive path network of polymer nanocomposites containing spherical nanoparticles

2014 ◽  
Vol 1619 ◽  
Author(s):  
Argyrios Karatrantos ◽  
Nigel Clarke ◽  
Russel J. Composto ◽  
Karen I. Winey
Keyword(s):  
Polymer Nanocomposites ◽  
Volume Fraction ◽  
Md Simulations ◽  
Polymer Structure ◽  
Polymer Chains ◽  
Radius Of Gyration ◽  
Spherical Nanoparticles ◽  
Topological Constraints ◽  
Nanoparticle Radius ◽  
Entangled Polymer

ABSTRACTWe investigate the effect of nanoparticles on polymer structure, polymer dimensions and topological constraints (entanglements) in polymer melts for nanoparticle loading above percolation threshold as high as 40.9% using stochastic molecular dynamics (MD) simulations. We show unambiguously that short polymer chains are not disturbed by the presence of repulsive nanoparticles. In contrast entangled polymer chains can be perturbed by the presence of attractive nanoparticles when the polymer radius of gyration is larger than the nanoparticle radius. They can expand under the presence of attractive nanoparticles even at low nanoparticle loadings of very small nanoparticle size. We observe an increase in the number of entanglements (decrease of Ne with 40.9% volume fraction of nanoparticles dispersed in the polymer matrix) in the nanocomposites as evidenced by larger contour lengths of the primitive paths. Attraction between polymers and nanoparticles affects the entanglements in the nanocomposites and alters the primitive path.

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