Epoxy matrix polymer composites with metal particle reinforcements

2021 ◽  
Author(s):  
G. B. Veeresh Kumar ◽  
Pragada Vyas Kumar ◽  
Shubham Kumar ◽  
V. Vinay Datta ◽  
R. Harsha Sai
Keyword(s):  
Polymer Composites ◽  
Epoxy Matrix ◽  
Metal Particle ◽  
Matrix Polymer

Development of bamboo polymer composites with improved impact resistance

2021 ◽  
pp. 096739112110093
Author(s):  
RM Abhilash ◽  
GS Venkatesh ◽  
Shakti Singh Chauhan
Keyword(s):  
Impact Strength ◽  
Flexural Strength ◽  
Polymer Composites ◽  
Impact Resistance ◽  
Adverse Impact ◽  
Matrix Polymer ◽  
Bamboo Fibre ◽  
The Matrix ◽  
Major Criterion ◽  
Pp Composites

Reinforcing thermoplastic polymers with natural fibres tends to improve tensile and flexural strength but adversely affect elongation and impact strength. This limits the application of such composites where toughness is a major criterion. In the present work, bamboo fibre reinforced polypropylene (PP) composites were prepared with bamboo fibre content varying from 30% to 50% with improved impact resistance. Homopolymer and copolymer PP were used as the matrix polymer and an elastomer was used (10% by wt.) as an additive in the formulation. Copolymer based composites exhibited superior elongation and impact strength as compared to homopolymer based composites. The adverse impact of elastomer on tensile and flexural strength was more pronounced in homopolymer based composites. The study suggested that the properties of the bamboo composites can be tailored to suit different applications by varying reinforcement and elastomer percentage.

Exceptionally high thermal and electrical conductivity of three-dimensional graphene-foam-based polymer composites

RSC Advances ◽  
2016 ◽  
Vol 6 (27) ◽  
pp. 22364-22369 ◽  
Author(s):  
Zhiduo Liu ◽  
Dianyu Shen ◽  
Jinhong Yu ◽  
Wen Dai ◽  
Chaoyang Li ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Polymer Composites ◽  
Epoxy Matrix ◽  
Three Dimensional ◽  
Neat Epoxy ◽  
Graphene Foam

Three dimensional graphene foam incorporated into epoxy matrix greatly enhance its thermal conductivity (up to 1.52 W mK−1) at low graphene foam loading (5.0 wt%), over an eight-fold enhancement in comparison with that of neat epoxy.

Molecular Dynamics Simulations of Diffusion of O2 and N2 Penetrants in Polydimethylsiloxane-Based Nanocomposites

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
Douglas E. Spearot ◽  
Alex Sudibjo ◽  
Varun Ullal ◽  
Adam Huang
Keyword(s):  
Molecular Dynamics ◽  
Polymer Composites ◽  
Diffusion Coefficients ◽  
Metal Particle ◽  
Interatomic Potential ◽  
Md Simulations ◽  
Coarse Grained ◽  
Cu Nanoparticles ◽  
Cu Nanoparticle ◽  
Nanoparticle Inclusions

Recently, metal particle polymer composites have been proposed as sensing materials for micro corrosion sensors. To design the sensors, a detailed understanding of diffusion through metal particle polymer composites is necessary. Accordingly, in this work molecular dynamics (MD) simulations are used to study the diffusion of O2 and N2 penetrants in metal particle polymer nanocomposites composed of an uncross-linked polydimethylsiloxane (PDMS) matrix with Cu nanoparticle inclusions. PDMS is modeled using a hybrid interatomic potential with explicit treatment of Si and O atoms along the chain backbone and coarse-grained methyl side groups. In most models examined in this work, MD simulations show that diffusion coefficients of O2 and N2 molecules in PDMS-based nanocomposites are lower than that in pure PDMS. Nanoparticle inclusions act primarily as geometric obstacles for the diffusion of atmospheric penetrants, reducing the available porosity necessary for diffusion, with instances of O2 and N2 molecule trapping also observed at or near the PDMS/Cu nanoparticle interfaces. In models with the smallest gap between Cu nanoparticles, MD simulations show that O2 and N2 diffusion coefficients are higher than that in pure PDMS at the lowest temperatures studied. This is due to PDMS chain confinement at low temperatures in the presence of the Cu nanoparticles, which induces low-density regions within the PDMS matrix. MD simulations show that the role of temperature on diffusion can be modeled using the Williams–Landel–Ferry equation, with parameters influenced by nanoparticle content and spacing.

Investigation and Measurement of Electrical Transport of Metal Particle Polymer Composites for the Development of MEMS-Based Corrosion Sensor

2009 ◽  
Author(s):  
Feng Pan ◽  
Adam Huang
Keyword(s):  
Electrical Resistivity ◽  
Polymer Composites ◽  
Electrical Transport ◽  
Redox Reactions ◽  
Metal Particle ◽  
Electrochemical Corrosion ◽  
Corrosion Mechanism ◽  
Operating Life ◽  
Natural Form ◽  
Corrosion Sensor

Recently, our research group has proposed a MEMS-based solid state corrosion sensor based on the carbon black and metal particle polymer composite materials. The chemical and dimensional properties of the particles and polymer matrix will provide the tailorability in sensor sensitivity, selectivity, time response, and operating life-span. This paper will analyze the electrical resistivity of the sensor relative to the percentage of different type of particles in PDMS matrix in order to understand the effect of corrosion mechanism on metal particle polymer composites. This paper will also present the electrical quantification techniques for the micro corrosion sensors, the understanding of which is need for the transduction from corrosion to electronic output. Electronic transduction is the natural form of output due to the redox reactions of the electrochemical corrosion of particles and the electric current generated is directly proportional to the rate of the reaction.

scholarly journals Interfacial Bonding in a Nanoclay/Polymer Composite

2011 ◽  
Vol 410 ◽  
pp. 156-159
Author(s):  
Mo Lin Chan ◽  
Kin Tak Lau ◽  
Tsun Tat Wong
Keyword(s):  
Thermal Properties ◽  
Chemical Composition ◽  
Polymer Composites ◽  
Polymer Composite ◽  
Chemical Bonding ◽  
Photoelectron Spectroscopy ◽  
Epoxy Matrix ◽  
Mechanical And Thermal Properties ◽  
X Ray ◽  
The Matrix

In this study, X-ray photoelectron spectroscopy (XPS) was conducted to analyze the chemical composition between epoxy matrix and nanocomposite. This experiment revealed that a chemical bonding at an interface between the matrix and nanoclay of the composites did exist. Thus, such bonding can enhance the mechanical and thermal properties of resultant polymer composites as reported in many literatures.

Vibration Damping Enhancement of Fiber Reinforced Polymer Composites With Surface Grown Zinc Oxide Nanorods

2013 ◽  
Author(s):  
Nejib Masghouni ◽  
Marwan Al-Haik
Keyword(s):  
Zinc Oxide ◽  
Polymer Composites ◽  
Epoxy Matrix ◽  
Composite Structures ◽  
Damping Ratio ◽  
Zno Nanowires ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites

The use of zinc oxide (ZnO) nanostructures with fiber reinforced polymer composites has gained more applications recently due to the additive benefits of the semi-conductivity and piezoelectricity of ZnO. In this study, we suggest growing ZnO nanowires (NWs) on the surface of woven carbon fibers using low temperature (c.a. 80°C) hydrothermal technique and integrating the modified fibers in composite structures based on epoxy matrix. Mechanical vibrations tests based on samples with and without surface-grown ZnO established the enhanced damping of the hybrid composite structures through measuring the damping ratio and the vibration amplitude. We hypothesize that, besides the piezoelectric induced damping, the large aspect ratio of ZnO nanowires could provide higher interfacial friction with the epoxy matrix and in between the neighboring nanowires which in return could provide more energy dissipation.

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