Synthesis of Novel crosslinked Poly(azomethine-urethane)s: Photophysical and thermal properties

Polymers for Advanced Techs

2020

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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.

Section: Methodsmentioning

confidence: 99%

Section: Synthesis Of Polymersmentioning

confidence: 99%

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

Kamacı

Polymers for Advanced Techs

2020

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“…An amount of 0.02 mol of 4-aminophenol, dissolved in methanol (5 ml), was poured into these mixtures and heated (60 • C, 6 h), slowly. These mixtures were filtered, distilled from acetonitrile and they were dried in a vacuum oven [30]. The yields of purely synthesized SB-9, SB-10 and SB-11 were found to be 73, 74 and 74%, respectively.…”

Section: Synthesis Procedures Of Schiff Bases and (Paz-e)smentioning

confidence: 99%

“…DMA tests were carried out by a Perkin Elmer Pyris Diamond DMA 115 V using a single cantilever bending mode at a frequency of 1 Hz, at a heating rate of 3 • C min −1 and in the range of 20−350 • C under a N 2 (100 ml min −1 ) atmosphere. The samples were prepared as follows: 0.2 g of (PAZ-E)s was placed into the titanium clamp (supplied from Triton Technology Ltd., United Kingdom) and extended, followed by closing of the clamps at both sides [30].…”

Section: Characterization Techniquesmentioning

confidence: 99%

Synthesis, characterization, optical and electrochemical band gaps of green poly(azomethine-ester)s containing oxalyl and succinyl units

Temizkan

2019

Bull Mater Sci

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A new series of poly(azomethine-ester)s (PAZ-E)s with different (turning ortho, meta and para) positions were synthesized by condensation polymerization. The chemical structure of polymers was verified by 1 H-NMR, 13 C-NMR, FTIR and UV-Vis measurements. Electrochemical characteristics of the corresponding polymers were obtained with cyclic voltammetric (CV) analysis. Thermal characteristics of the obtained polymers were analysed by TG-DTA, DMA and DSC measurements. The first degradation temperature values of PAZ-E compounds were found between 198 and 250 • C from TGA measurements. Photophysical characteristics of the obtained polymers were explained with photoluminescence (PL) spectroscopy. Molecular weight distributions of (PAZ-E)s were obtained by gel permeation chromatographic (GPC) analysis. Two-and three-dimensional (2D and 3D) properties and images of the synthesized (PAZ-E)s were analysed by SEM and AFM surface analysis techniques, respectively. Electrochemical band gap (E g) values of (PAZ-E)s P-9, P-10, P-11, P-12, P-13 and P-14 were calculated as 2.58, 2.14, 1.90, 2.06, 1.89 and 1.69 eV, respectively. The E g values of the (PAZ-E)s were found to be quite low.

“…Another important class of the high‐performance conjugated polymers is poly(azomethine)s (PAMs). These conjugated polymers have been attracted much interest because of their thermal stability, mechanical strength, optoelectronic, photovoltaic, paramagnatism, electrical conductivity, liquid crystalline, therapeutic, and ability to form complexes with metals, applications such as sensors and light emitting materials . Moreover, different derivatives of PAMs such as poly(azomethine‐urethane)s, poly(azomethine‐ether)s, poly(azomethine‐carbonate)s, and poly(azomethine‐sulfone)s were synthesized to improved solubility and processability of these polymer types.…”

Section: Introductionmentioning

confidence: 99%

Poly(azomethine‐imide)s containing siloxane moities: Optical, thermal, mechanical, and morphological properties

J of Applied Polymer Sci

Kamacı

2019

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A new series of poly(azomethine‐imide)s having siloxane moities in backbone was prepared using different dianhydrides.Thermal, optical, and morphological properties of these polymers were clarified. Also, bulky CO and CF3 group effects and meta or para‐substituted aldeyhde effects on the mentioned properties were evaluated. The structural characterization of poly(azomethine‐imide)s was carried out using a FT‐IR spectroscopy. The optical properties of the polymers were performed via an UV–Vis spectrophotometer. Optical band gap of the poly(imide)s containing azomethine was calculated between 2.20 and 2.33 eV. Thermal behavior of poly(azomethine‐imide)s was also studied using TG‐DTA, DSC, and DMA techniques. The onset degradation temperature and percentage char values of the polyimides were found in the range from 429 to 545 °C and 22 to 35%, respectively. Thermal stability results demonstrated that benzophenone bearing poly(azomethine‐imide)s have higher onset temperature, percentage char, and the glass transition temperature than poly(azomethine‐imide)s derived from hexafluoroisopropylidene. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48364.