Fabrication of novel nanocomposites from styrene-butadiene rubber/zinc sulphide nanoparticles

Jasna, V. C.; Ramesan, M. T.

doi:10.1007/s10853-018-2173-z

Cited by 17 publications

(6 citation statements)

References 34 publications

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“…Among the nanocomposites, PBMA with 7 wt% CeO 2 sample shows maximum value and beyond this loading, the dielectric constant decreases. The increase in the dielectric constant of composites is due to the additional contribution from the space charge polarization that exists between the PBMA matrix and the CeO 2 nanoparticles . However, at higher loading of the nanoparticles, due to the self‐agglomeration of nanoparticles, the effective interfacial interaction between the PBMA and the CeO 2 nanoparticles gets interrupted and result in a decrease in the dielectric value.…”

Section: Resultsmentioning

confidence: 95%

Effect of ceria nanoparticles on mechanical properties, thermal and dielectric properties of poly (butyl methacrylate) nanocomposites

Suhailath

Ramesan

2020

Polymer Composites

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Poly (butyl methacrylate) (PBMA) reinforced with various contents of ceria (CeO2) nanocomposites were prepared by a simple in situ polymerization method and their mechanical properties, thermal transitions, and electrical properties were studied in detail. The incorporation of CeO2 nanoparticles in the PBMA matrix was confirmed by transmission electron microscopy (TEM) analysis. The increase in absorption intensity of UV‐Visible spectra by the addition of CeO2 nanoparticles shows the better dispersion of nanoparticles in the PBMA chain. The X‐ray diffraction (XRD) patterns further revealed the semi‐crystalline behavior of the PBMA by the addition of nanoparticles. The differential scanning calorimetry (DSC) analysis indicated that the glass transition temperature of PBMA was significantly enhanced in presence of CeO2 particles. The higher thermal stability of polymer nanocomposites than that of pure PBMA was revealed from the TG analysis. The dielectric properties and AC conductivity of nanocomposites were higher than PBMA, and these electrical properties increased with the loading of ceria nanoparticles. The improvement in tensile strength and the decrease in elongation at break of composites than pure PBMA indicated the better reinforcement of ceria nanoparticles in PBMA matrix. The mechanism of increase in tensile strength of a composite by the incorporation of nanoparticles was studied by different theoretical modeling. In general, compared with pure PBMA, the polymer nanocomposite exhibited superior dielectric constant, thermal and mechanical properties, which enables their use in the fabrication of high energy storage nanoelectronic devices.

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Section: Resultsmentioning

confidence: 95%

Effect of ceria nanoparticles on mechanical properties, thermal and dielectric properties of poly (butyl methacrylate) nanocomposites

Suhailath

Ramesan

2020

Polymer Composites

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“…The final weight loss obtained at 600°C for pure PPy is only 46.78% whereas the composite with 3 and 7 wt% PPy/Cu-Al 2 O 3 composite shows the final char reside around 59.22 and 61.74%, respectively, at 600°C and a similar result was observed in our previous work. 29…”

Section: Resultsmentioning

confidence: 99%

Structural characterization, electrical properties and gas sensing applications of polypyrrole/Cu-Al₂O₃ hybrid nanocomposites

Sankar

Parvathi

Ramesan

2020

High Performance Polymers

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The present work focused on the synthesis of polypyrrole (PPy) wrapped nano copper-alumina (Cu-Al2O3) composite by an in situ polymerization of pyrrole in the presence of Cu-Al2O3 nanoparticles. The polymerized samples were systematically characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) analysis, scanning electron microscope (SEM), high-resolution transmission electron microscope (HR-TEM), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The properties such as AC and DC conductivity, dielectric constant, and ammonia gas sensing performance of PPy/Cu-Al2O3 composites were investigated in detail as a function of Cu-Al2O3 content. The FTIR spectra showed the existence of sharp and resolved infrared bands of nanoparticles in the PPy chain. The presence of the crystalline peaks of Cu-Al2O3 in the PPy matrix was confirmed from the XRD analysis. SEM images revealed the homogenous growth of Cu-Al2O3 in the polymer with the formation of spherically shaped particles. The HR-TEM observation showed that Cu-Al2O3 particles were dispersed at a nanometer level in the nanocomposites with a width of 30–60 nm. The glass transition temperature of composites obtained from DSC was found to be increased with increase in the content of nanoparticles. TGA analysis proved that the nano Cu-Al2O3 in the content in the composites acted as a mass transport barrier that retards the degradation of the product. The AC conductivity and dielectric constant of the nanocomposite showed that the maximum electrical properties were observed for the composite with 5 weight percentage loading of Cu-Al2O3. DC conductivity showed that the PPy/Cu-Al2O3 composites have higher electrical conductivity than PPy. The ammonia gas sensing property of the composites was significantly enhanced by the addition of Cu-Al2O3 nanoparticles. Therefore, the improved properties of synthesized PPy/Cu-Al2O3 nanocomposite can be useful for developing functional composite material for the fabrication of sensors, electronic devices, and high energy storage capacitors.

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“…Although high filler loading and unreasonable particle size matching of fillers in composite can form thermal conductive network. − Nevertheless, voids between the fillers generated in mixing process are large, and the polymer matrix filled in the voids becomes an inevitable obstacle for the formation of a good thermal conduction path, due to the large thermal resistance of polymer layers. The fillers in the thermal conductive polymer composite are not dense, and the efficiency of the thermal conductive network is low. , In order to achieve a closest packing of fillers, the size and proportion of the particles must meet certain requirements.…”

Section: Resultsmentioning

confidence: 99%

Particle Packing Theory Guided Thermal Conductive Polymer Preparation and Related Properties

Lin

Han

Zhao

et al. 2018

ACS Appl. Mater. Interfaces

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Thermal conductive polymer composites are satisfying for thermal management of electronic devices. However, how to choose the sizes of thermal conductive fillers to get a high thermal conductivity of composites are still clueless and poor filler size matching will also affect the processability of the composites. Closest packing model was used to guide multiscale thermal conductive particles filling silicone rubber in this work. A highest thermal conductivity of 1.381 W·m·K at filler loading of 50 vol % was determined among nine comparing formulations. The fillers with small particle size filled the interspaces of fillers with large particle size to form more complete thermal conduction paths and heat dissipation was increased. The apparent densities and rheological tests further verified the effectiveness of closest packing model. This study provides theoretical guidance for thermal conductive polymer composites to achieve high thermal conductivity and good processability, which has an important practical application.

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Fabrication of novel nanocomposites from styrene-butadiene rubber/zinc sulphide nanoparticles

Cited by 17 publications

References 34 publications

Effect of ceria nanoparticles on mechanical properties, thermal and dielectric properties of poly (butyl methacrylate) nanocomposites

Effect of ceria nanoparticles on mechanical properties, thermal and dielectric properties of poly (butyl methacrylate) nanocomposites

Structural characterization, electrical properties and gas sensing applications of polypyrrole/Cu-Al₂O₃ hybrid nanocomposites

Particle Packing Theory Guided Thermal Conductive Polymer Preparation and Related Properties

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Fabrication of novel nanocomposites from styrene-butadiene rubber/zinc sulphide nanoparticles

Cited by 17 publications

References 34 publications

Effect of ceria nanoparticles on mechanical properties, thermal and dielectric properties of poly (butyl methacrylate) nanocomposites

Effect of ceria nanoparticles on mechanical properties, thermal and dielectric properties of poly (butyl methacrylate) nanocomposites

Structural characterization, electrical properties and gas sensing applications of polypyrrole/Cu-Al2O3 hybrid nanocomposites

Particle Packing Theory Guided Thermal Conductive Polymer Preparation and Related Properties

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Product

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Structural characterization, electrical properties and gas sensing applications of polypyrrole/Cu-Al₂O₃ hybrid nanocomposites