Vol.:(0123456789) Polymer Bulletin https://doi.org/10.1007/s00289-020-03404-z 1 3 ORIGINAL PAPER Thermal and dielectric investigation of magnetic nanoparticles functionalized with PVC via click chemistry Mustafa Ersin Pekdemir 1  · Abdulrahman Tukur 1,2  · Mehmet Coskun 1 Received: 1 August 2020 / Revised: 25 September 2020 / Accepted: 2 October 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract In the frst phase, PVC was modifed with sodium azide through a nucleophilic sub- stitution reaction. Then, the propargyl methacrylate was synthesized from propargyl alcohol and methacryloyl chloride. The copolymerization of propargyl methacrylate and vinyltrimethoxysilane was carried out by free-radical polymerization method in tetrahydrofuran (THF) at 70 °C in with AIBN as the initiator. The magnetic nan- oparticle was bonded to vinyltrimethoxysilane units of the copolymer. Finally, the copolymer with propargyl end group bearing the magnetic nanoparticle on its side chain was bonded to PVC-N 3 by click reaction. FTIR spectroscopy was used for the characterization. The thermal stability of PVC decreased after the azidation reac- tion and increased by grafting of magnetic nanoparticles to the copolymer. Vibration sample magnetometer (VSM) measurements revealed that the product reached satu- ration magnetization (M s ) at 33.7 emu/g, while the pure Fe 3 O 4 nanoparticle showed M s value of 53.2 emu/g. As the applied frequency increased, the dielectric constant (ε′) and dielectric loss factor (ε″) of the copolymers diminished, while the AC con- ductivity (σ ac ) increased. Keywords PVC · Magnetic nanoparticle · Click chemistry · Thermal and dielectric Introduction Magnetic nanoparticles are an increasingly important area in industrial applications due to their electrical, thermal, electronic, mechanical, and optical properties. Like- wise, magnetic nanoparticles are also widely used in several aspects [1]. One of the selected host polymer matrix is poly(vinyl chloride) (PVC), which has an extensive range of uses, low production cost, biocompatibility, chemical resistance, and stability * Mustafa Ersin Pekdemir epekdemir@frat.edu.tr 1 Faculty of Science, Department of Chemistry, Firat University, 23119 Elazig, Turkey 2 Faculty of Science, Chemistry Department, Federal University Dutse, Dutse 7156, Jigawa, Nigeria