Modification, thermal and electrical properties of novel methacrylate polymers bearing functional end groups

The main aim of this study is to obtain functional polymers with a combination of properties such as high photosensitivity, good thermal stability, improved solubility, etc., according to the desired purpose and the environment in which it will be used. In this context, click chemistry, which has been developed in recent years and has been used in many studies, has enabled the binding of molecules with versatile properties. In this thesis, it is aimed to further functionalize the polymer structure by using click reaction. First, chalcone derivatives were obtained by using different aldehydes with ketone structure. Then 4-hydroxy 3-methyl cinnamic acid was synthesized and new monomer with hydroxyl side group was synthesized with methacrylate acid. Free radicalip polymerization method was used to prepare the homopolymer. Three different chalcone derivatives were added to the synthesized homopolymer by the click method using copper catalyst to obtain new polymers. Structural characterization of the synthesized homopolymer and polymers modified by click method was performed. FT-IR, 1H - 13C NMR and UV-Vis spectra techniques were used for characterization. The thermal behavior of the synthesized polymers and modified polymers were investigated by DSC and TGA. The dielectric behavior of the polymers was investigated as a function of temperature and frequency and correlated with their structure. Activation energies for the thermal degradation of P(HMCA-PA), P(HMCA-PA-click-dimethylamino chalcone) and P(HMCA-PA-click-nitro chalcone) according to the Flyn-Wall-Ozawa method were calculated from the degradation curves at different heating rates. The optical properties of the synthesized P(HMCA-PA-click-ferrocene chalcone) compound were investigated.