Metallurgy and Material Science
Material science
Аuthors
1*, 1**, 1***, 2****, 3*****1. Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia
2. Branch of Talrose Institute of Energetic Problems of Chemical Physics Russian Academy of Sciences, 1, Academician Semenov av., Chernogolovka, Moscow region, 142432, Russia
3. Institute of Problems of Chemical Physics of the Russian Academy of Sciences, IPCP RAS, 1, Academician Semenov av., Chernogolovka, Moscow region, 142432, Russia
*e-mail: bnm.90@mail.ru
**e-mail: fetisov901@mail.ru
***e-mail: k_kamila@mai.ru
****e-mail: sokolov@binep.ac.ru
*****e-mail: dzhardim@icp.ac.ru
Abstract
A line of composite materials based on low-density linear polyethylene (LDPE) thermoplastic matrices, polypropylene (PP) and metallic nanoparticles was produced by mixing in polymer melt. The results of dynamic mechanical analysis of PP based composites with metallic nanoparticles, namely the product of Co (II) acrylamide nitrate complex and 2% FeCoAAm co-crystallizatant thermolysis, within the temperature range from −50 °C to +150 °C revealed, that low concentration of nano-filler (1 wt.%) does not lead to noticeable changes in dynamic elastic modulus, nano-composite mechanical losses and loss tangent. Thermooxidative degradation results indicated the increase of thermostability for above said PP-based composites compared to the initial PP at 4 and 8 wt.% of nanoparticles.
The authors obtained nanocomposite materials based on polyolefin matrix and pre-synthesized by chemical co-deposition magnetite nanoparticles such as LDPE-Fe3O4 and PP-Fe3O4. According to X-ray diffraction analysis, the major component in the system was magnetite nanoparticles with an average size of 15 nm. These results correspond to scanning electron microscopy data. The paper demonstrates that with the increase of nanoparticles content in polymer, and with magnetite high content in particular, the elastic modulus increases, and the tensile strength value decreases. Thermal behavior analysis in the PP-Fe3O4 (at 4 wt.%) system indicates that nanocomposite thermo-oxidative degradation reduced compared to the initial polypropylene, and the temperature of maximum degradation start-up increases from 300°C to 385°C.
Composite materials based on LDPE and Al65Cu22Fe13 with alloy (0.1 to 10 wt.%) were produced. The paper demonstrates that the presence of quasi-crystalline alloy as a filler leads to composites strength properties improvement. Unlike LDPE-Fe3O4 systems, a tensile strength of LDPE-Al65Cu22Fe13 increases with low filler concentrations.
Protective action of the nanocomposite systems under test in relation to beta-radiation was studied using dose metering method. It was demonstrated that with filler content increase in LDPE-Al65Cu22Fe13 and LDPE-Fe3O4 composites beta-radiation flux attenuation occurs. A high correlation between the portion of passing beta-radiation and relative dielectric constant of composite materials based on thermoplastic polymer matrix with metal-filler was observed.
Keywords:
metallic nanoparticles, nanocomposite materials, thermolysis, radiation protection properties, dielectric propertiesReferences
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