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Browsing by Subject "1,3-DIPOLAR CYCLOADDITION POLYMERIZATION"

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    Synthesis of new poly(1,2,3-triazolyl-benzenesulfonamide)s via step-growth polymerization and characterization of their structures
    (SPRINGER) Ay, E
    In this article, three new poly(1,2,3-triazolyl-benzenesulfonamide)s (4-6) were synthesized from the new molecule 4-azido-N-(prop-2'-yn-1'-yl)benzenesulfonamide (3). The synthesis and step-growth click polyaddition reaction of a new AB-type monomer containing terminal alkyne and azide groups were described. Copper (I)-catalyzed azide-alkyne cycloaddition (CuAAC) and Huisgen click polymerization were performed to prepare sulfonamide, a derivative of poly(1,2,3-triazole) s. The CuAAC polymerization regioselectively led to 1,4-disubstituted triazole ring and hence to a stereoregular polymer. In contrast, the thermal polymerization also produced 1,5-disubstituted triazole units. The structure of the new poly(1,2,3-triazolyl-benzenesulfonamide)s (4-6) obtained from (4-azido-N-(prop-2'-yn-1'-yl)benzenesulfonamide) were characterized by FTIR, 1H-, and 13C-NMR spectroscopy. The resulting polymers had weight-average molecular weights in the 7,700-58,650 range and were determined by Gel Permeation Chromatography (GPC). The resulting polymers 4, 5 and 6, lossing about 50% of their weights, showed a decomposition temperature of 406, 474, and 451 degrees C in a nitrogen atmosphere, respectively. The glass transition temperature of all polymers were at 128 degrees C. In addition, the surface morphology was studied via Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM/EDS). This paper is dedicated to the 100th Annivesary of Repuclic of Turkiye.