Photophysical, Electrochemical, Thermal and Morphological Properties of Polyurethanes Containing Azomethine Bonding

Kamacı, Musa; Kaya, İsmet

doi:10.1080/10601325.2014.937129

Cited by 16 publications

(11 citation statements)

References 39 publications

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“…The aromatic rings, with 2,4-toluenediisocyanate and methylene-di-p-phenyldiisocyanate groups formed rigid chains, which makes intermolecular interactions difficult and thereby reduces thermal resistance at the beginning of the process, but at high temperatures aromatic diisocyanate-based PAZUs showed improved stability [32,33]. These results are consistent with those reported previously [34,35]. In comparison to typical polyurethanes, the PAZUs showed very good thermal stability.…”

Section: Thermal Propertiessupporting

confidence: 94%

Fluorescence, thermal and electrochemical properties of poly(azomethine-urethane)s containing sulfone group

2015

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In this study, the new sulfone group-containing poly(azomethine-urethane)s (PAZUs) were synthesized to investigate the effects various diisocyanates on the thermal, fluorescence, electrochemical and morphological properties. The structures of PAZUs have been confirmed by FT-IR, NMR, and SEC analyses. The electrochemical behaviors of the PAZUs were examined by cyclic voltammetry. Optical properties were investigated by UV-Vis and fluorescence measurements. The PAZUs were further characterized by TGA, DSC, SEM, and AFM techniques. TGA analyses results showed considerable increase in the thermal stability of polyurethanes due to the introduction of azomethine bond in the main chain. Consequently, because of the fine thermal properties the obtained materials can be used to produce thermally stable materials.

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Section: Thermal Propertiessupporting

confidence: 94%

Fluorescence, thermal and electrochemical properties of poly(azomethine-urethane)s containing sulfone group

2015

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“…Schiff base (monomer) was prepared by condensation reaction of TATA (0.378 g, 3 mmol) with 4‐HBA (2.109 g, 9 mmol) according to our previous papers (Figure ) …”

Section: Methodsmentioning

confidence: 99%

Biodegradable and antibacterial poly(azomethine‐urethane)‐chitosan hydrogels for potential drug delivery application

Kamacı

Kaya

2020

Polymers for Advanced Techs

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In this study, biodegradable and antibacterial poly(azomethine‐urethane) (PAMU)‐ and chitosan (CS)‐based hydrogels have been prepared for controlled drug delivery applications. Structural and morphological characterizations of the hydrogels were performed via Fourier transform‐infrared and scanning electron microscopy analyses. Thermal stability, hydrophilicity, swelling, mechanical, biodegradation, protein absorption properties, and drug delivery application of PAMU‐ and CS‐based hydrogels were also investigated. The swelling performance of the hydrogels was studied in acidic, neutral, and alkaline media. Swelling results showed that the hydrogels have higher swelling capacity in acidic and alkaline media than neutral medium. Biodegradation experiments of the hydrogels were also studied via hydrolytic and enzymatic experiments. The drug release property of the hydrogel was carried out using 5‐fluoro uracil (5‐FU), and 5‐FU release capacity of the hydrogels was found in the range from 40.10% to 58.40% after 3 days.

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“…The measurements were carried out in DMSO solution. The optical band gaps ( E g ) of poly(ether imide)s were also calculated from the absorption edges of ultraviolet–visible spectra as reported in the literature …”

Section: Methodsmentioning

confidence: 99%

Synthesis, optical, and thermal properties of polyimides containing flexible ether linkage

Kaya

Kamacı

2018

J of Applied Polymer Sci

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The goal of this article was to synthesize a series of flexible polyimides containing ether linkage in main chain and clarified the effect of this ether linkage on some physical properties such as optical and thermal decomposition. Also, different functional group effects such as carbonyl (CO), hexa‐fluoro‐isopropylidene [C(CF3)2] and phenyl (C6H5) on these physical properties were evaluated. The structural characterization of poly(ether imide)s was performed using Fourier transform infrared, 1H‐nuclear magnetic resonance (NMR), and 13C‐NMR techniques. Optical band gap of polyimides was calculated in the range from 2.57 to 2.81 eV. Thermal characterization of poly(ether imide)s was carried out using thermogravimetry–differential thermal analysis and differential scanning calorimetry. Thermal stability of poly(ether imide)s was evaluated by initial decomposition temperature (Ton) and char. Ton value of polymers was determined in the range from 100 to 195 °C. In addition, glass transition temperatures of poly(ether imide)s were found between 144 and 148 °C. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46573.

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Photophysical, Electrochemical, Thermal and Morphological Properties of Polyurethanes Containing Azomethine Bonding

Cited by 16 publications

References 39 publications

Fluorescence, thermal and electrochemical properties of poly(azomethine-urethane)s containing sulfone group

Fluorescence, thermal and electrochemical properties of poly(azomethine-urethane)s containing sulfone group

Biodegradable and antibacterial poly(azomethine‐urethane)‐chitosan hydrogels for potential drug delivery application

Synthesis, optical, and thermal properties of polyimides containing flexible ether linkage

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