Synthesis, characterization, and thermal stability of novel poly(azomethine-urethane)s and polyphenol derivatives derived from 2,4-dihydroxy benzaldehyde and toluene-2,4-diisocyanate

Kaya, İsmet; Avcı, Ali

doi:10.1016/j.matchemphys.2012.01.021

Cited by 19 publications

(10 citation statements)

References 35 publications

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“…Some additional peaks including aromatic -CH (3010-3063 cm -1 ) stretch and aliphatic -CH (2857-2952 cm -1 ) vibration are also shown in Table 2. The analysis results clearly verify the formation of PAZUs [19,27,28]. 13 C-NMR spectrum of SS is shown in Fig.…”

Section: Solubilities and Structures Of The Compoundsmentioning

confidence: 60%

“…The strong hydrogen in the polymer chains inhibits the interactions between polymer chains and solvent molecules. As a result, because polymer chains could not be transported into solution, their solubilities are limited in this medium [18,19].…”

Section: Solubilities and Structures Of The Compoundsmentioning

confidence: 99%

“…They can be used in several products such as furniture, coatings, adhesives, constructional materials, textiles, paints, elastomers, and synthetic leathers [16][17][18]. Azomethine derivatives of polyurethanes were reported in literature, and their thermal, semi-crystalline, and optical properties were investigated [19][20][21][22]. According to our knowledge, no study has been reported PAZUs containing sulfone unit by now.…”

Section: Introductionmentioning

confidence: 99%

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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: Solubilities and Structures Of The Compoundsmentioning

confidence: 60%

Section: Solubilities and Structures Of The Compoundsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2015

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“…Researchers have attempted in various ways to focus on improving the thermal stability of PU. The most accepted approach for the improvement of thermal stability of PUs is a chemical modification in the structure by introducing thermally stable heterocyclic polymers such as azomethine (4,5), urea (6), epoxy (7), diacetylene (8), and polyimide (9).…”

Section: Introductionmentioning

confidence: 99%

Fluorescence, Thermal, Electrochemical, and Morphological Properties of New Poly(Urethane-İmide)s: Synthesis and Characterization

Avcı

Şirin

2014

Journal of Macromolecular Science, Part A

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New thermally stable poly(urethane-imide)s (PUIs) were synthesized to investigate aliphatic and aromatic group effects on various properties such as thermal stability and electrochemical properties. Thermal characterizations were carried out by TG-DTA and DSC techniques. TGA results showed that the PUIs derived from aromatic diisocyanates had relatively higher thermal stabilities as compared to the aliphatic diisocyanate. They have between 223-245 • C onset temperature and above 37% char at 1000 • C. Also, thermal degradation values show that PUIs have higher stability than conventional PU. DSC results showed that the new PUIs have Tg values between 134 and 138 • C. Fluorescence measurements were performed using dimethyl sulfoxide solutions and also, the optimization of the concentrations maximal emission intensity was investigated in dimethyl sulfoxide. As a result, the remarkable properties related to the fluorescence and thermal measurements of the polymers were obtained. Therefore, these polymers could be used in various application fields because of the fluorescent and thermal properties.

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“…They also undergo dissociation of urethane linkages at elevated temperatures. [1,2] As a result, tremendous research efforts have been reported to improve the thermal stability of PUs. Most of the reported approaches are based on copolymerization or blending with other polymers of high thermal stability such as polyimides, [3][4][5][6] polyurea, [7,8] polyamide, [9,10] and polyazomethine.…”

Section: Introductionmentioning

confidence: 99%

Thermal, fluorescence, and electrochemical characteristics of novel poly(urethane-imide)s

Avcı

Şirin

2013

Designed Monomers and Polymers

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In this study, the novel thermally stable poly(urethane-imide)s (PUIs) were synthesized. The structures of the obtained polymers were confirmed by FT-IR and NMR techniques. The molecular weight distribution parameters of the synthesized PUIs were determined by the size exclusion chromatography (SEC). The synthesized PUIs were also characterized by solubility tests, solution viscosity, TG-DTA, and DSC analyses. Cyclic voltammetry measurements were carried out, and HOMO-LUMO energy levels and electrochemical band gaps (E 0 g ) were calculated from their absorption edges. Additionally, optical band gaps (E g ) were determined by using UV-vis spectra of the materials. Fluorescence measurements were carried out in various concentrated DMSO solutions to determine the optimum concentrations to obtain the maximal PL intensities. Also, morphological characterizations were made by scanning electron microscopy technique.

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Synthesis, characterization, and thermal stability of novel poly(azomethine-urethane)s and polyphenol derivatives derived from 2,4-dihydroxy benzaldehyde and toluene-2,4-diisocyanate

Cited by 19 publications

References 35 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

Fluorescence, Thermal, Electrochemical, and Morphological Properties of New Poly(Urethane-İmide)s: Synthesis and Characterization

Thermal, fluorescence, and electrochemical characteristics of novel poly(urethane-imide)s

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