Tatiana N. Myasoedova; Eugeniya N. Shishlyanikova; Tatiana A. Moiseeva; Maria Bzerzinskaya
Abstract
In the present work, the PANI and PANI/Zr composite powders were synthesized by the method of chemical polymerization in the inorganic acid medium. The morphology of prepared composites demonstrates fiber-like structure revealed by scanning electron microscopy. The value of the specific surface area ...
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In the present work, the PANI and PANI/Zr composite powders were synthesized by the method of chemical polymerization in the inorganic acid medium. The morphology of prepared composites demonstrates fiber-like structure revealed by scanning electron microscopy. The value of the specific surface area estimated by the BET technique depends on the type of the composite powder and was found to be 66.8 and 142.05 m 2 /g for PANI and PANI/Zr respectively. UV–Vis spectroscopy was employed to characterize the optical properties of the synthesized powder composites. The incorporation of zirconium gives rise to the red shift of π– π* transition of pristine PANI. The synthesized composite powders were used for preparation of PANI/PVA and PANI/Zr/PVA composites which electrochemical properties were compared in different electrolytes: 0.5 M KOH, 0.5 M NaCl and 0.5 M H2SO4. Excellent electrochemical reversibility was found out for both PANI/PVA and PANI/Zr/PVA composites. Effect of electrolyte type and current value on the specific capacitance of the prepared composites was observed.
A. Jayakumar; N. Malarvizhi; B. Rajeswari; A. Murali; Debasis Samanta; P. Saravanan; C. Muralidharan; Sellamuthu N. Jaisankar
Abstract
Semi-interpenetrating polymer networks (semi-IPNs) based polyurethane (PU), polyvinyl alcohol (PVA) and functionalized single–walled carbon nanotubes (f-SWCNTs), films were prepared using sequential polymerization technique. Carboxyl functionalized SWCNTs in semi-IPNs matrixes were confirmed by ...
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Semi-interpenetrating polymer networks (semi-IPNs) based polyurethane (PU), polyvinyl alcohol (PVA) and functionalized single–walled carbon nanotubes (f-SWCNTs), films were prepared using sequential polymerization technique. Carboxyl functionalized SWCNTs in semi-IPNs matrixes were confirmed by Raman spectroscopy and hydrogen bond interactions were studied using attenuated total reflectance fourier transform infrared spectroscopy. The soft segments of the PU with nanotubes interact much stronger than hard segments, this was observed by Differential Scanning Calorimeter. The activation energy and thermal degradation temperatures were calculated from thermogravimetric analysis. The tensile strength and Young’s modulus was increases with increase f-SWCNTs loadings. The AFM micrographs clearly shows f-SWCNTs were located in semi-IPNs matrix. Further, SWCNTs are attached in PU and spherical structures were dispersed in polymer matrix. The surface activation energy of the composites were increases up to 29 kJ/mole with increasing SWCNTs content on PU networks.