scholarly journals Phase Behavior of Grafted Polymer Nanocomposites from Field-Based Simulations

2019 ◽  
Vol 52 (14) ◽  
pp. 5110-5121 ◽  
Author(s):  
Jason P. Koski ◽  
Nadia M. Krook ◽  
Jamie Ford ◽  
Yoshikazu Yahata ◽  
Kohji Ohno ◽  
...  
Keyword(s):  
Phase Behavior ◽  
Polymer Nanocomposites ◽  
Grafted Polymer

scholarly journals Precise growth of polymer brushes on silica-based nanocomposites via visible-light-regulated controlled radical polymerization

2019 ◽  
Vol 7 (11) ◽  
pp. 6173-6179 ◽  
Author(s):  
Xue Li ◽  
Sunjie Ye ◽  
Ya Huang ◽  
Jia Le Li ◽  
Tao Cai
Keyword(s):  
Physicochemical Properties ◽  
Visible Light ◽  
Radical Polymerization ◽  
Polymer Nanocomposites ◽  
Polymer Brushes ◽  
Controlled Radical Polymerization ◽  
Crucial Importance ◽  
Grafted Polymer ◽  
Precise Control

Precise control over molecular variables of grafted polymer brushes is of crucial importance for obtaining polymer nanocomposites with desirable architectures and physicochemical properties, yet it remains a significant synthetic challenge.

Refractive Index Engineering of Polymer Nanocomposites Prepared by End-grafted Polymer Chains onto Inorganic Nanoparticles

2011 ◽  
Vol 1359 ◽  
Author(s):  
Peng Tao ◽  
Anand Viswanath ◽  
Yu Li ◽  
Atri Rungta ◽  
Brian C. Benicewicz ◽  
...  
Keyword(s):  
Refractive Index ◽  
Polymer Nanocomposites ◽  
Polymer Brushes ◽  
Raft Polymerization ◽  
Weight Percent ◽  
High Refractive Index ◽  
Inorganic Nanoparticles ◽  
Polymer Chains ◽  
Hybrid Particles ◽  
Grafted Polymer

ABSTRACTTransparent polymer nanocomposites with high refractive index were prepared by grafting polymer chains onto TiO2 nanoparticles. Reversible addition-fragmentation chain transfer (RAFT) polymerization was used to prepare poly(methyl methacrylate) (PMMA) polymer brushes grafted from TiO2 nanoparticles. The refractive index of the hybrid material increased from 1.49 for neat PMMA to 1.6 by increasing the loading of TiO2 to 40 weight percent. UV-vis spectra showed that grafted particles had a transparency of more than 90% in the visible light range. The hybrid particles can be processed into transparent, high refractive index coatings and self-standing films. The grafted TiO2 nanoparticles can also be easily dispersed into a polymer matrix forming thick, robust transparent polymer nanocomposites.

Structure, scattering patterns and phase behavior of polymer nanocomposites with nonspherical fillers

Soft Matter ◽  
2010 ◽  
Vol 6 (5) ◽  
pp. 1015 ◽  
Author(s):  
Lisa M. Hall ◽  
Kenneth S. Schweizer
Keyword(s):  
Phase Behavior ◽  
Polymer Nanocomposites

Polymer Nanocomposites with Designed Interfaces

2007 ◽  
Vol 334-335 ◽  
pp. 909-912
Author(s):  
Linda S. Schadler ◽  
Sarah L. Lewis ◽  
Jun Wei Yang ◽  
Brian C. Benicewicz
Keyword(s):  
Molecular Weight ◽  
Polymer Nanocomposites ◽  
Silica Particles ◽  
Interface Region ◽  
Curved Surfaces ◽  
Grafted Polymer ◽  
Preliminary Results ◽  
Graft Density ◽  
Composite Properties

This paper shows preliminary results for polymer nanocomposites consisting of “hairy” silica particles with grafted polystyrene in polystyrene matrices of controlled molecular weight and polydispersity. The goal of the work is to tailor the degree of wetting / interaction between the particles and polymer by controlling the graft density and molecular weight of the grafted polymer. This is providing an opportunity to study the properties of the interface region and to control the bulk composite properties. We have found that the predictions for flat brushes are qualitatively, but not quantitatively, applicable and that the highly curved surfaces of nanoparticles present several challenges for the design of nanoparticle interfaces. The talk will present more complete results in this system and provide an overview of other work in our group using tailored interfaces to control nanocomposite properties.

Phase behavior of cationic and anionic surfactants at low concentrations

1992 ◽  
Vol 50 (1) ◽  
pp. 694-695
Author(s):  
E. Naranjo
Keyword(s):  
Phase Behavior ◽  
Structural Characterization ◽  
Dynamic Systems ◽  
Anionic Surfactants ◽  
Intermolecular Forces ◽  
Stable Form ◽  
Surfactant Mixtures ◽  
Low Concentrations ◽  
Cationic And Anionic Surfactants ◽  
General Method

Equilibrium vesicles, those which are the stable form of aggregation and form spontaneously on mixing surfactant with water, have never been demonstrated in single component bilayers and only rarely in lipid or surfactant mixtures. Designing a simple and general method for producing spontaneous and stable vesicles depends on a better understanding of the thermodynamics of aggregation, the interplay of intermolecular forces in surfactants, and an efficient way of doing structural characterization in dynamic systems.

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