In situ synthesis, morphology and magnetic properties of poly(ether–ester) multiblock copolymer/carbon-covered nickel nanosystems

• Published in: Journal of non-crystalline solids Vol. 356; no. 37; pp. 1893 - 1901
• Main Authors: Guskos, N., Typek, J., Padlyak, B.V., Gorelenko, Yu K., Pelech, I., Narkiewicz, U., Piesowicz, E., Guskos, A., Roslaniec, Z.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier B.V 15-08-2010; Elsevier
• Subjects: Addition polymerization; Carbon-covered nickle nanoparticles; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Copolymers; Deformation and plasticity (including yield, ductility, and superplasticity); Exact sciences and technology; Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance; Magnetic properties; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Mechanical and acoustical properties of condensed matter; Mechanical properties; Mechanical properties of solids; Nanoparticles; Nanostructure; Nickel; Particulate composites; Physics; Poly(ether-ester) multiblock copolymer; Temperature dependence; Carbon-covered nickle nanoparticles; Magnetic properties; Poly(ether-ester) multiblock copolymer; Magnetic field effects; Elasticity; Ether copolymer; Carbon; Magnetic susceptibility; Nanoparticles; Ferromagnetic resonance; Glass transition; Ester copolymer; Composite materials; Nanocomposites; Temperature effects; Fine particle; Coated particle; Nickel; Microstructure; Tensile properties; Particle orientation
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2010.07.014

Samples containing fine particles of face-centered cubic (fcc) phase of carbon-covered nickel (Ni/C) embedded in the PBT-block-PTMO polymer were synthesized. The characterization of the composites by various techniques and the effect of the Ni/C filler on the thermal and mechanical properties of the polymer are presented. A low concentration of magnetic nanoparticles in the polymer increased substantially the melting point and the polymer–glass transition temperature. Additionally, the elastic properties of the polymer were shown to improve significantly due to the presence of nanoparticles. The ferromagnetic resonance (FMR) study of these samples was carried out in the 4–300
K temperature range. A symmetrical and very intense FMR line was recorded at all temperatures. The FMR line displayed very interesting behavior in different temperature regions. The static magnetic susceptibility was investigated in the 10–400
K temperature and 1–10
kOe magnetic field ranges. The temperature dependence in the high temperature range suggested that the process of reorientation of magnetic nanoparticles strongly depended on the state of the matrix. A comparison of the mechanical properties of our samples with the same copolymer doped with single wall carbon nanotubes was made.