satish kumar | Jawaharlal Nehru Technological University (original) (raw)
Papers by satish kumar
ABSTRACT Due to their exceptional mechanical, physical, thermal, optical, and electrical properti... more ABSTRACT Due to their exceptional mechanical, physical, thermal, optical, and electrical properties, carbon nanotubes are being dispersed in polymers using variety of approaches. These polymer/carbon nanotube composites are being used to make film, fibers, and bulk .......
ABSTRACT This article describes a new gel-spinning process for making high-strength poly(ethylene... more ABSTRACT This article describes a new gel-spinning process for making high-strength poly(ethylene oxide) (PEO) fibers. The PEO gel-spinning process was enabled through an oligomer/polymer blend in place of conventional organic solvents, and the gelation and solvent-like properties were investigated. A 92/8 wt% poly(ethylene glycol)/PEO gel exhibited a melting temperature around 45°C and was highly stretchable at room temperature. Some salient features of a gel-spun PEO fiber with a draw ratio of 60 are tensile strength at break = 0.66 ± 0.04 GPa, Young's modulus = 4.3 ± 0.1 GPa, and a toughness corresponding to 117 MJ/m3. These numbers are significantly higher than those previously reported. Wide-angle x-ray diffraction of the high-strength fibers showed good molecular orientation along the fiber direction. The results also demonstrate the potential of further improvement of mechanical properties. POLYM. ENG. SCI., 2014. © 2014 Society of Plastics Engineers
ABSTRACT Due to their exceptional mechanical, physical, thermal, optical, and electrical properti... more ABSTRACT Due to their exceptional mechanical, physical, thermal, optical, and electrical properties, carbon nanotubes are being dispersed in polymers using variety of approaches. These polymer/carbon nanotube composites are being used to make film, fibers, and bulk .......
ABSTRACT This article describes a new gel-spinning process for making high-strength poly(ethylene... more ABSTRACT This article describes a new gel-spinning process for making high-strength poly(ethylene oxide) (PEO) fibers. The PEO gel-spinning process was enabled through an oligomer/polymer blend in place of conventional organic solvents, and the gelation and solvent-like properties were investigated. A 92/8 wt% poly(ethylene glycol)/PEO gel exhibited a melting temperature around 45°C and was highly stretchable at room temperature. Some salient features of a gel-spun PEO fiber with a draw ratio of 60 are tensile strength at break = 0.66 ± 0.04 GPa, Young's modulus = 4.3 ± 0.1 GPa, and a toughness corresponding to 117 MJ/m3. These numbers are significantly higher than those previously reported. Wide-angle x-ray diffraction of the high-strength fibers showed good molecular orientation along the fiber direction. The results also demonstrate the potential of further improvement of mechanical properties. POLYM. ENG. SCI., 2014. © 2014 Society of Plastics Engineers