Investigation of structural, thermal and dielectric properties of PVC/modified magnetic nanoparticle composites
Abstract
Three different composites (5, 10, and 20 wt. %) were prepared using purified PVC and POH-g-N3PTMS-g-Fe3O4. Firstly, 3-azidopropyltrimethoxysilane was synthesized under reflux from 3-chlorotrimethoxysilane and sodium azide. Then, magnetic nanoparticle was bonded with the silane group of 3-azidopropyltrimethoxysilane. After that the 3-azidopropyltrimethoxysilane bearing magnetic nanoparticle undergo click reaction with propargyl alcohol, and then the composites were prepared. Some characterization, including FT-IR spectroscopy, SEM, Differential scanning calorimetry (DSC), vibrating sample magnetometer (VSM), and EDX images was performed to the composites. The DSC measurements showed that the click reaction of the 3-azidopropyltrimethoxysilane graft magnetic nanoparticles (N3PTMS-g-Fe3O4) reduced the glass transition temperature (Tg). Click reaction reduced the thermal stability of N3PTMS-g-Fe3O4. The thermal stabilities of the composites increased by increasing the compositional rate. It was found that the 10% PVC /POH-g-N3PTMS-g-Fe3O4 reached saturation magnetization (Ms) at 5.12 emu/g. The dielectric constant (ε´) and dielectric loss (″) of POH-g-N3PTMS-g-Fe3O4 rapidly decreased with increasing applied frequency and then remain more or less constant. Also, the AC conductivity (ac) increased sharply with increasing the applied frequency. While the ε´ decreased slightly for the composites by increasing the applied frequency and the ac increase dramatically with an increase in applied frequency at room temperature.
Keywords
PVC,Fe3O4 nanoparticles,click reaction,composite,dielectric
Project Number
FF.18.18
References
- [1] Wilson J., Poddar P., Frey N., Srikanth H., Mohomed K., Harmon J., Kotha S. and Wachsmuth J. Synthesis and magnetic properties of polymer nanocomposites with embedded iron nanoparticles. Journal of Applied Physics, 95 (2004) 1439-1443.
- [2] Frounchi M., Hadi M. Effect of synthesis method on magnetic and thermal properties of polyvinylidene fluoride/Fe3O4 nanocomposites. Journal of Reinforced Plastics and Composites, 32 (2013) 1044-1051.
- [3] Omidi M. H., Alibeygi M., Piri F. and Masoudifarid M. Polystyrene/magnetite nanocomposite synthesis and characterization: investigation of magnetic and electrical properties for using as microelectromechanical systems (MEMS). Materials Science-Poland, 35 (2017) 105-110.
- [4] Chávez-Guajardo A. E., Medina-Llamas J. C., Maqueira L., Andrade C. A., Alves K. G. and de Melo C. P. Efficient removal of Cr (VI) and Cu (II) ions from aqueous media by use of polypyrrole/maghemite and polyaniline/maghemite magnetic nanocomposites. Chemical Engineering Journal, 281 (2015) 826-836.
- [5] Haruna H., Pekdemir M. E., Tukur A. and Coşkun M. Characterization, thermal and electrical properties of aminated PVC/oxidized MWCNT composites doped with nanographite. Journal of Thermal Analysis and Calorimetry, (2020) 1-9.
- [6] Qiu F., He G., Hao M. and Zhang G. Enhancing the Mechanical and Electrical Properties of Poly (Vinyl Chloride)-Based Conductive Nanocomposites by Zinc Oxide Nanorods. Materials, 11 (2018) 2139.
- [7] Tao Y., Feng W., Ding G. and Cheng G. Polyaniline nanorods/PVC composites with antistatic properties. Russian Journal of Physical Chemistry A, 89 (2015) 1445-1448.
- [8] Habashy M. M., Abd-Elhady A. M., Elsad R. and Izzularab M. A. Performance of PVC/SiO 2 nanocomposites under thermal ageing. Applied Nanoscience, (2019) 1-9.
- [9] Yazdani H., Hatami K., Khosravi E., Harper K. and Grady B. P. Strain-sensitive conductivity of carbon black-filled PVC composites subjected to cyclic loading. Carbon, 79 (2014) 393-405.
- [10] Yao K., Gong J., Tian N., Lin Y., Wen X., Jiang Z., Na H. and Tang T. Flammability properties and electromagnetic interference shielding of PVC/graphene composites containing Fe 3 O 4 nanoparticles. Rsc Advances, 5 (2015) 31910-31919.