A series of poly (methacrylic acid-Co-maleic acid), P(MAA-MA), hydrogels have been prepared by free radical polymerization in aqueous medium using different amount of maleic acid (MA) (0-5 wt.%), initiated by potassium persulfate (KPS) in the presence of N,N'-methylenebisacrylamide (MBA) as a crosslinking agent. Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and scanning electron microscope (SEM) techniques were used to characterize the prepared hydrogels. Their swelling behaviours were investigated according to the maleic acid content and pH of solution. Kinetic swelling of hydrogels was studied too. The results showed that the swelling ratios increase with increasing the maleic acid content. Kinetic studies showed good fitting to pseudo-second order equation. The prepared hydrogels obeyed non-Fickian water diffusion.
New Schiff bases heterocyclic structures have been synthesized and evaluated for their antibacterial and antifungal properties. They were prepared by a condensation reaction of 2-amino-5-methylthiazole, 4-amino-4H-1,2,4-triazole and 3-amino-1H-1,2,4-triazole with p-vinylbenzaldehyde 1p and m-vinylbenzaldehyde 1m. The synthesized compounds were characterized by 1 H-NMR, 13 C-NMR, FT-IR and UV-Vis. The compounds were examined for antibacterial and antifungal activities in vitro using the disc diffusion method. Activity against two bacterial strains (gram positive bacteria and gram negative bacteria) and two fungal strains is discussed. These compounds are active against assayed bacteria (Pseudomonas aeruginosa ATCC 26883 and Staphylococcus aureus ATCC4330,) and fungal strain (Candida albicans ATTC 10231) with minimal inhibitory concentration (MIC) value of 10 µg/mL.
We have synthesis and characterization of a novel block copolymer containing poly (ethylene oxide) (PEO) as hydrophilic segment, and poly (4-vinyl benzene chloride) PVBC as hydrophobic segment. The synthesis of these block copolymer poly (4-vinyl benzene chloride)-bpoly(ethylene oxide) was achieved by using the direct method which deals with starting of VBC by H 2 SO 4 as iniator, followed by deactivation of the macrocation by PEO. The structure of the model compounds was confirmed by spectral analyses. The various characteristics of the resulting amphiphilc copolymers including: FT-IR, 1 H NMR, GPC, DRX(SAXS), AFM and thermal analysis by DSC, analysis of critical micelle concentration CMC were determined and discussed.
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