Electronically conducting montmorillonite-Cu2S and montmorillonite-Cu2S-polypyrrole nanocomposites

Ranaweera, R. A. A. Upul; Bandara, H.M.N.; Rajapakse, R.M.G.

doi:10.1016/j.electacta.2007.05.044

Cited by 12 publications

(12 citation statements)

References 11 publications

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“…[47][48][49] The values of the storage modulus (E 0 ), in turn, confirmed the observations of the modeling performed for the Young's modulus data determined through tensile tests, that is, the formation of partially exfoliated/intercalated nanocomposites and the resulting reinforcement effect of the polymer matrix by the reduction of the molecular mobility due to the presence of platelets with a high aspect ratio. 50,51 ) were lower than the value of the volumetric resistivity of the reference PVC compound (2.63 Â 10 13 X cm). Therefore, increasing O-MMT contents in the PVC matrix were expected to reduce the value of VER of the final nanocomposite, even with a simple additive effect considered.…”

Section: Mechanical Propertiesmentioning

confidence: 73%

Poly(vinyl chloride)/metallic oxides/organically modified montmorillonite nanocomposites: Preparation, morphological characterization, and modeling of the mechanical properties

Rodolfo

Mei

2009

J of Applied Polymer Sci

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Poly(vinyl chloride), metallic oxides (from copper, molybdenum, and zinc), and organically modified montmorillonite (O-MMT) nanocomposites were prepared in a melt-blending or intercalation-in-the-molten-state process. The morphology of the nanocomposites was evaluated with X-ray diffraction (XRD) and transmission electron microscopy (TEM). Properties, such as the mechanical, thermal, and electrical properties, and the dynamic thermal stability against dehydrochlorination were also evaluated. Nanocomposites with a hybrid intercalated/exfoliated structure were obtained in all of the situations considered, as demonstrated by the XRD and TEM results and indirectly by the increment of Young's modulus of the formulations with increasing amount of O-MMT incorporated. The modeling of Young's modulus by the Halpin-Tsai, HuiShia, and Lewis-Nielsen theories showed that the process of nanocomposite preparation allowed the aspect ratio of the clay particles to increase; these values were comparable to those nanocomposites obtained by other researchers with different polymeric matrices and methodologies.

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Section: Mechanical Propertiesmentioning

confidence: 73%

Poly(vinyl chloride)/metallic oxides/organically modified montmorillonite nanocomposites: Preparation, morphological characterization, and modeling of the mechanical properties

Rodolfo

Mei

2009

J of Applied Polymer Sci

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“…PPy ring vibrations were located between 800 and 1600 cm À1 [106]. The bands at 1300, 1470, and 1551 cm À1 were attributed to C -N, C -C, C = C modes, respectively, while the band at 1178 cm À1 was assigned to ring breathing stretching [107,108]. Thereby, the characteristic peaks of PPy in the EVMT system showed the intercalation of PPy in the EVMT interlayers.…”

Section: Nanocompositesmentioning

confidence: 89%

Spectroscopy of Nanostructured Conducting Polymers

Nascimento

Souza

2010

Nanostructured Conductive Polymers

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“…22 shows the thermal decomposition of pure PP, PPy PP/10%PPy and PP/20%PPy nanocomposites prepared without dispersant. From derivation of TGA curves, the maximum decomposition temperatures were estimated and summarized inTable 3.5.…”

mentioning

confidence: 99%

Synthesis and Characterization of Polypyrrole Nanoparticles and Their Nanocomposites with Poly(propylene)

Sevil

Küçükyavuz

2010

Macromolecular Symposia

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, 75 pages Conducting polypyrrole (PPy) nanoparticles were synthesized via microemulsion polymerization system. The characterization of PPy nanoparticles was done by Fourier transform infrared spectrometer (FTIR) and scanning electron microscope (SEM). Nanocomposites were prepared by melt-mixing of polypyrrole with polypropylene (PP) and processed with injection molding. The amount of PPy in nanocomposites varied in the range of 1-20% by weight. The effect of PPy nanoparticles on mechanical, electrical properties and thermal stability of nanocomposites were investigated. Tensile test has revealed that increasing amount of PPy increased the strength and the stiffness of the nanocomposite while limiting the elongation of PP. Thermal gravimetric analysis has showed that incorporation of PPy nanoparticles has improved the thermal stability of the nanocomposites. Four probe conductivity measurement has exhibited that increasing amount of PPy nanoparticles increases the conductivity of nonconductive PP up to 2,4.10-4 Scm-1. In order to improve the dispersion of PPy in PP, sodium dodecylsulphate was used as dispersant. The same techniques were used to characterize nanocomposites containing 2% by weight dispersant. Composites prepared with dispersant have exhibited improvement in some mechanical and thermal properties and involved smaller dimension PPy nanoparticles.

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Electronically conducting montmorillonite-Cu2S and montmorillonite-Cu2S-polypyrrole nanocomposites

Cited by 12 publications

References 11 publications

Poly(vinyl chloride)/metallic oxides/organically modified montmorillonite nanocomposites: Preparation, morphological characterization, and modeling of the mechanical properties

Poly(vinyl chloride)/metallic oxides/organically modified montmorillonite nanocomposites: Preparation, morphological characterization, and modeling of the mechanical properties

Spectroscopy of Nanostructured Conducting Polymers

Synthesis and Characterization of Polypyrrole Nanoparticles and Their Nanocomposites with Poly(propylene)

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