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Photophysical and Thermal Properties of Polyazomethines Containing Various Flexible Units
İsmet Kaya,Ali Avcı,Kevser Temizkan 한국고분자학회 2017 Macromolecular Research Vol.25 No.1
In this study, the poly(azomethine-ether-urethane), poly(azomethine-ester) and poly(azomethine-epoxyether) compounds were prepared to investigate effect of various flexible units on some physical properties like thermal stability and photophysical properties. Structural characterizations were made by FTIR, 1H NMR, 13C NMR, and UV-Vis analyses. The molecular weight distributions of polymers were performed by gel permeation chromatography (GPC) measurement. The chemical and physical properties of polymers were examined by thermogravimetry (TG), differential scanning calorimetry (DSC), photoluminescence (PL), dynamic mechanical analysis (DMA), scanning electron microscope (SEM) and atomic force microscopy (AFM) techniques. As a result, the outstanding properties related to the photoluminescence and thermal measurements of the polymers were obtained. Therefore, the presented photoluminescent polymers could be used in thermally stable photo-functional materials.
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İsmet Kaya,Ali Avcı,Kevser Temizkan 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.4
New poly(azomethine-urethane)s (PAMU)s were prepared to investigate the effects of different four diisocyanateson some physical properties such as thermal stability, optical and electrochemical properties. First, the fluoreneSchiff base was synthesized as in the literature. Then, this Schiff base was converted to poly(azomethine-urethane)susing diisocyanates (2,4-toluenediisocyanate, 1,4-phenylene diisocyanate, methylene-di-p-phenyl-diisocyanate, andhexamethylene-diisocyanate) via condensation reaction. Second, the structures of PAMUs were confirmed by FT-IR,NMR, and UV-Vis spectral analyses. Cyclic voltammetry (CV) was used to determine the electrochemical oxidationreductioncharacteristics of (PAMU)s. The CV results of PAMUs compounds showed to have an electrochemical bandgap below such as 2.0 eV. The PAMUs were characterized by TGA, DSC, SEM, SEC and AFM techniques. TGA analysisresults of compounds showed considerable increasing of the thermal stability of polymers, because of finding ofazomethine bond in the main chain.
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