Investigation into the Atomistic Scale Mechanisms Responsible for the Enhanced Dielectric Response in the Interfacial Region of Polymer Nanocomposites

2020 ◽  
Vol 124 (21) ◽  
pp. 11558-11563
Author(s):  
C. Ulises Gonzalez-Valle ◽  
Seung Ho Hahn ◽  
Murali Gopal Muraleedharan ◽  
Q.M. Zhang ◽  
Adri C.T. van Duin ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Dielectric Response ◽  
Interfacial Region

Direct Detection of Local Electric Polarization in the Interfacial Region in Ferroelectric Polymer Nanocomposites

2019 ◽  
Vol 31 (21) ◽  
pp. 1807722 ◽  
Author(s):  
Simin Peng ◽  
Xiao Yang ◽  
Yang Yang ◽  
Shaojie Wang ◽  
Yao Zhou ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Direct Detection ◽  
Electric Polarization ◽  
Interfacial Region ◽  
Ferroelectric Polymer

In situ polymer nanocomposites: Effect of nanoparticles on the interfacial region

2006 ◽  
Vol 13 (7) ◽  
pp. 647-655 ◽  
Author(s):  
Yu. S. Lipatov ◽  
L. F. Kosyanchuk ◽  
N. V. Yarovaya
Keyword(s):  
Polymer Nanocomposites ◽  
Interfacial Region

Synergetic effects of interfacial and spatial confinement in polymer nanocomposites

2017 ◽  
Vol 31 (23) ◽  
pp. 1730003 ◽  
Author(s):  
Weiwei Zhao ◽  
Yunlan Su ◽  
Dujin Wang
Keyword(s):  
Polymer Nanocomposites ◽  
Three Dimensional ◽  
Industrial Applications ◽  
Spatial Effect ◽  
Polymer Chains ◽  
Interfacial Region ◽  
Controversial Issues ◽  
Interfacial Effect ◽  
Segmental Dynamics ◽  
Polymeric Component

Dispersing three-dimensional (3D) nanoparticles as the filler into a polymeric component is known to significantly improve the physicochemical properties of the materials and makes them attractive for industrial applications. There are two main contributions to the underlying enhancement mechanism of polymer nanocomposites (PNCs). The first contribution is linked to the interfacial effect, originating from the interaction between polymer and nanoparticles. The packing density, conformation and orientation of adsorbed chains are significantly altered, which results in an interfacial region with different properties from the bulk. The second contribution is attributed to the spatial effect, introduced by confining polymer chains in a restricted space between/among nanoparticles. These two effects are often correlated. The characteristic behavior of polymer chains confined by nanoparticles has already shown to be quite complicated and hence interesting as compared with that of pure polymers. The broad range of influencing factors including the size, content and surface chemistry of nanoparticles as well as the molecular weight and chain ends of polymers were discussed in this review. The controversial issues such as the segmental dynamics at interface, interfacial architecture and the extent of its impact on the bulk phase were summarized, wishing to produce further understanding of PNCs.

scholarly journals IMPROVING THE STRENGTH CHARACTERISTICS OF PACKERS' SEALING ELEMENTS MADE OF POLYMER NANOCOMPOSITES.

2021 ◽  
Vol 07 (03) ◽  
pp. 34-39
Author(s):  
Arzu Süleymanova Arzu Süleymanova
Keyword(s):  
Tensile Strength ◽  
Polymer Nanocomposites ◽  
Interfacial Adhesion ◽  
Micromechanical Model ◽  
Interfacial Interaction ◽  
Nano Composites ◽  
Interfacial Region ◽  
Strength Model ◽  
High Modulus ◽  
Sealing Elements

On the basis of a micromechanical model of the tensile strength of a polymer composite, it is shown that, in contrast to the case of adhesion between two polymers, when there is a linear correlation between the thickness of the interfacial region and the level of interfacial adhesion, the strength of the interface in nanocomposites of the "polymer-high modulus filler" type decreases with growth. its thickness. The dependence of the tensile strength of polymer nano-composites on the properties of the material and the level of interfacial interaction has been established. Keywords: strength model, interfacial adhesion, nanocomposite, seal material, packer.

scholarly journals Effects of Graphene Oxidation on Interaction Energy and Interfacial Thermal Conductivity of Polymer Nanocomposite: A Molecular Dynamics Approach

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1709
Author(s):  
Francesco Maria Bellussi ◽  
Carlos Sáenz Ezquerro ◽  
Manuel Laspalas ◽  
Agustín Chiminelli
Keyword(s):  
Molecular Dynamics ◽  
Graphene Oxide ◽  
Interaction Energy ◽  
Polymer Nanocomposites ◽  
Polymer Nanocomposite ◽  
Nonequilibrium Molecular Dynamics ◽  
Interfacial Thermal Resistance ◽  
Interfacial Region ◽  
Pristine Graphene ◽  
Kapitza Resistance

Interfacial characteristics of polymer nanocomposites represent a crucial aspect to understand their global properties and to evaluate the interaction between nanofillers and matrix. In this work we used a molecular dynamics (MD) approach to characterize the interfacial region at the atomistic scale of graphene-based polymer nanocomposites. Three different polymer matrixes were considered, polylactic acid (PLA), polypropylene (PP) and epoxy resin (EPO), which were reinforced with three types of graphene fillers: pristine graphene (G), graphene oxide (GO) and reduced graphene oxide (rGO). In particular, the compatibility of the nanofillers in polymer matrixes were evaluated in terms of the interaction energy, while the interfacial thermal resistance (Kapitza resistance) between matrices and fillers was calculated with a nonequilibrium molecular dynamics (NEMD) method. Results showed that the oxidation degree plays an important role on the studied properties of the interfacial region. In particular, it was observed that the Kapitza resistance is decreased in the oxidized graphene (GO and rGO), while interaction energy depended on the polarity of the polymer matrix molecules and the contribution of the Coulombic component.

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