Synergistic effect of vermiculite clay and ionizing irradiation on the physical and mechanical properties of polybutadiene rubber/ethylene propylene diene monomer nanocomposite

2019 ◽  
Vol 107 (3) ◽  
pp. 221-232
Author(s):  
Khaled F. El-Nemr ◽  
Magdy A. M. Ali ◽  
Medhat M. Hassan ◽  
Huda E. Hamed
Keyword(s):  
Mechanical Properties ◽  
Gas Permeability ◽  
Physical And Mechanical Properties ◽  
Analytical Techniques ◽  
Clay Nanocomposites ◽  
Ethylene Propylene Diene Monomer ◽  
Ethylene Propylene ◽  
Transmission Electron ◽  
Polybutadiene Rubber ◽  
Vermiculite Clay

Abstract Blends of rubber-rubber have desired properties intermediated between two rubber matrices. On the other hand, polymer-clay nanocomposites have attracted the attention of many researchers and experimental results are presented in a large number of recent papers and patents because of the outstanding mechanical properties and low gas permeability that are achieved in many cases. Polymer-clay nanocomposites are a new class of mineral-field polymer that contain relatively small amounts (<10%) of nanometer-sized clay particles. In this study, new nanocomposite materials were produced from the blend of polybutadiene rubber (BR) and ethylene propylene diene monomer rubber (EPDM), BR/EPDM (50/50) as matrix and organically modified vermiculite clay (VMT) by quaternary alkylammonium in different contents (3, 6, 9 and 12 phr) as the filler by using rubber mill then, the rubber nanocomposite sheets were irradiated at doses of 25, 50, 75, 100 and 150 kGy using γ-radiation technique as a crosslinking tool. The prepared composites can be characterized by using various analytical techniques including X-ray diffractometer (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) as well as mechanical properties measurements.

Effect of annealed titania on dielectric and mechanical properties of ethylene propylene diene monomer-titania nanocomposites

e-Polymers ◽  
2014 ◽  
Vol 14 (4) ◽  
pp. 267-275 ◽  
Author(s):  
Rakesh Manna ◽  
Suryakanta Nayak ◽  
Mostafizur Rahaman ◽  
Dipak Khastgir
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Room Temperature ◽  
Ethylene Propylene Diene Monomer ◽  
Ethylene Propylene ◽  
Transmission Electron ◽  
Lower Dielectric Constant ◽  
Dynamic Light Scattering Technique ◽  
Dielectric And Mechanical Properties ◽  
Light Scattering Technique

AbstractFlexible ethylene propylene diene monomer (EPDM)-titania nanocomposites of different compositions were prepared by room temperature mixing using both neat and annealed titania. All these composites showed composition-dependent dielectric and mechanical properties, and composites with controlled dielectric properties could be made through judicial adjustment of the composition. The effect of moisture/filler heat treatment was also studied and found that composites with annealed titania showed lower dielectric constant than composites with normal titania. There was a significant improvement in mechanical properties, where composites with 60 parts per hundred parts of titania gave the optimum tensile strength. The particle size of titania particles was analyzed by high-resolution transmission electron microscopy (HRTEM) and a dynamic light scattering technique. The morphology and dispersion of titania particles in the EPDM matrix were studied by field emission scanning electron microscopy and HRTEM. Finally, different dielectric models were compared with experimental data, and the best match was achieved by the Lichtenecker model, which can be used as a predictive rule for different volume contents of titania filler in the EPDM matrix.

Effects of Processing Techniques on Morphology and Mechanical Properties of Epoxy-Clay Nanocomposites

2013 ◽  
Vol 652-654 ◽  
pp. 167-174 ◽  
Author(s):  
Nesar Merah ◽  
Muneer Al-Qadhi
Keyword(s):  
Mechanical Properties ◽  
Electron Microscope ◽  
Physical And Mechanical Properties ◽  
Processing Parameters ◽  
Clay Nanocomposites ◽  
Transmission Electron ◽  
Shear Mixing ◽  
Mixing Techniques ◽  
Processing Techniques ◽  
Morphology And Mechanical Properties

Proper dispersion of nano thin layered structure of nanoclay in polymer matrix offers new and greatly improved properties over pristine polymers. The degree of nanoclay dispersion and hence the improvements in the physical and mechanical properties depend greatly on the technique used and processing parameters. In this work, 2 wt.% epoxy-clay nanocomposites were fabricated using different mixing techniques to study the effect of mixing methods on the nanoclay dispersion and thus on the enhancement of the properties of the resultant nanocomposites. Three mixing techniques were explored: high shear mixing (HSM), ultrasonication and their combination as well as hand mixing. The effect of mixing techniques on morphology and mechanical properties of the resultant nanocomposites was investigated using scanning electron microscope (SEM), X-ray diffraction (XRD), transmission electron microscope (TEM) and tensile testing. The results of XRD and TEM showed that both exfoliated and disordered intercalated morphology were developed for the nanocomposites synthesized by HSM, while ordered intercalated morphology was observed for samples prepared by sonication. The tensile test results show that among the mixing techniques considered in this study HSM results in the optimum mechanical properties as a whole while hand mixing resulted in the worst physical and mechanical properties.

Improvement in thermal conductivity and mechanical properties of ethylene-propylene-diene monomer rubber by expanded graphite

2015 ◽  
Vol 38 (5) ◽  
pp. 870-876 ◽  
Author(s):  
Shaojian He ◽  
Yankai Lin ◽  
Lin Chen ◽  
Shanqiao Cao ◽  
Jun Lin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Expanded Graphite ◽  
Ethylene Propylene Diene Monomer ◽  
Ethylene Propylene

Properties of Natural Rubber Nanocomposites Reinforced with Carbon Nanotubes

2015 ◽  
Vol 1109 ◽  
pp. 195-199 ◽  
Author(s):  
Abd Aziz Azira ◽  
Dayang Habibah Abangismawi I. Hassim ◽  
D. Verasamy ◽  
Abu Bakar Suriani ◽  
M. Rusop
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Natural Rubber ◽  
Considerable Increase ◽  
Physical And Mechanical Properties ◽  
Rubber Matrix ◽  
Rubber Composites ◽  
Transmission Electron ◽  
Maximum Conductivity ◽  
Polymer Latex

In order to achieve improvements in the performance of rubber materials, the development of carbon nanotube (CNT)-reinforced rubber composites was attempted. The CNT/epoxidised natural rubber (ENR) nanocomposite was prepared through latex technology. Physical and mechanical properties of the CNT/ENR nanocomposites were characterized in contrast to the carbon black (CB)/ENR composite. The dispersion of the CNTs in the rubber matrix and interfacial bonding between them were rather good; monitored transmission electron microscopy and scanning electron microscopy. The mechanical properties of the CNT-reinforced ENR showed a considerable increase compared to the neat ENR and traditional CB/ENR composite. The storage modulus of the CNT/ENR nanocomposites greatly exceeds that of neat ENR and CB/ENR composites and a maximum conductivity of about 1 S m-1 can be achieved. The approach presented can be adapted to other CNT/polymer latex systems.

Effect of the vulcanizing system on the mechanical properties of butyl rubber/ethylene propylene diene monomer-carbon black blends

2003 ◽  
Vol 90 (6) ◽  
pp. 1539-1544 ◽  
Author(s):  
F. Abd-El Salam ◽  
M. H. Abd-El Salam ◽  
M. T. Mostafa ◽  
M. R. Nagy ◽  
M. I. Mohamed
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Butyl Rubber ◽  
Ethylene Propylene Diene Monomer ◽  
Ethylene Propylene

Multifunctional Elastomer Nanocomposites based on EPDM and Carbon Nanotubes

2008 ◽  
Vol 1143 ◽  
Author(s):  
Paola Ciselli ◽  
Lan Lu ◽  
James JC Busfield ◽  
Ton Peijs
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Linear Relation ◽  
Pressure Sensors ◽  
Ethylene Propylene Diene Monomer ◽  
Electrical Behavior ◽  
Ethylene Propylene ◽  
Multi Wall Carbon Nanotubes ◽  
Sensor Applications ◽  
Elastomeric Composites

ABSTRACTElastomeric composites based on Ethylene-Propylene-Diene-Monomer (EPDM) filled with multi-wall carbon nanotubes (MWNTs) have been prepared, showing improved mechanical properties as compared to the pure EPDM matrix. The results have been discussed using the Guth model. The main focus of the study was on the electrical behavior of the nanocomposites, in view of possible sensor applications. A linear relation has been found between conductivity and deformations up to 10% strain, which means that such materials could be used for applications such as strain or pressure sensors. Cyclic experiments were conducted to establish whether the linear relation was reversible, which is an important requirement for sensor materials.

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