Synthesis and dielectrical behavior of metal complexes containing polymer based ligands

In this study, 4-chloromethyl styrene was modified with diethanol amine to prepare diethanolaminoethyl styrene monomer (DEAMSt). The homopolymer of the modified (DEAMSt) monomer and the copolymers of styrene in two different compositions (13%, 38%) were synthesized. The synthesis of homo and copolymers were carried out, the free radical polymerization at 60oC using the AIBN initiator in presence of 1,4-dioxane solvent medium. The synthesized homo and copolymers were used as ligand, and the poymer complexes from Ni(II) and Co(II) ions were prepared. The structure of (DEAMSt), P(DEAMSt)L1 ve P(DEAMSt-ko-St)L11 was characterized determined by FT-IR, 1H-NMR and 13C-NMR spectroscopy techniques. Polymer-metal complexes were not soluble in any solvents, FT-IR for its characterization only FT-IR was used. A results of elemental analysis of homo, copolymer and complexes were estimated C, H, N % values and empirical formula was revealed. The average molecular weight and polydispersity of P(DEAMSt)L1 was determined by GPC. SEM images were taken and morphological structures in complexes were determined. The glass transition temperature (Tg) of P(DEAMSt)L1, P(DEAMSt-ko-St)L11 was determined by DSC. By TGA measurements and theirs thermal stabilities were carried. The results obtained were compared with each other. The dielectric behaviour of homopolymer, copolymer and polymer-metal complexes was investigated by impedance analyzer technique. Dielectric constant ('), dielectric loss factor (''), conductivity () properties were investigated as a function of frequency and temperature, and the results were compared with each other. Using the conductivity measurements, in the ln() ; 1/T plots were drawn and the activation energies (Ea) were calculated from the slope of the obtained line and compared with each other.