Reactions of trithiocyanuric acid with oxiranes. I. synthesis of polyetherols

Abstract

ABSTRACT:Reactions of trithiocyanuric acid with a large excess of ethylene oxide and propylene oxide in DMF solution and in the presence of triethylamine as catalyst were carried out. Trifunctional polyetherols containing an s-triazine ring were prepared. The structure of the products was confirmed by using elemental analysis, 1 H-NMR and IR techniques. Some of the physical properties and thermal stability of polyetherols were analyzed.

Reactions of trithiocyanuric acid with oxiranes. III. Reactions with epichlorohydrin

“…After the solvent and catalyst was removed under reduced pressure, resinous products were obtained. 1 Reactions of TTCA with ECH, carried out under analogous conditions, gave no expected polyetherols. Crosslinking of the products occurred during the reaction.…”

“…As previously described, 1, 2 reactions of trithiocyanuric acid (TTCA) with an excess of ethylene oxide or propylene oxide in DMF and in the presence of triethylamine as a catalyst yield polyetherols containing s ‐triazine rings. Their structure can be described by with R = H, CH 3 , and …”

“…The compounds, which have good thermal resistance, can be applied as components of polyurethane foams with improved thermal stability. 1 The kinetics and mechanism of the addition of TTCA to ethylene oxide and propylene oxide were also described. 2 This article deals with the addition of the same TTCA to epichlorohydrin (ECH), which is, in practice, an oxirane of a great importance.…”

The synthesis, characterization, and DC electrical conductivity of poly[di(2,5‐dimercapto‐1,3,4‐thiadiazole)‐metal] complexes

“…2,5-Dimercapto-1,3,4-thiadiazole (DMT) and poly-DMT (PDMT) are interesting compounds that attracted the attention of researchers because of their wide applications in many fields such as, determination of trace elements, synthesis of novel heterocyclic compounds with antimicrobial activity, 1,2 advanced technology materials, and battery cathode. 3,4 Furthermore, the successful commercial applications of electrically conducting polymers have attracted the attention of researchers long time ago and triggered intensive research. [5][6][7] In addition to that, much attention has been directed to polymeric metal complexes by researchers with many contributions in applications such as, protective coatings, catalysts, semiconductors, and analytical methods.…”

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Poly[di(2,3,]-metal complexes of Co(II), Ni(II), Cu(II), and Zn(II) were synthesized by the reaction of 2,5-dimercapto-1,3,4-thiadiazole (6.6 mmol) with anhydrous cobalt, nickel, copper, and zinc chlorides (3.3 mmol) in absolute ethanol under reflux for 24 h. The products were characterized by elemental analyses, electronic spectra, FTIR spectroscopy, as well as thermal analyses (TGA and DTA), and X-ray diffraction. The DC electrical conductivity variation of the poly[di(2,5-dimercapto-1,3,4-thiadiazole)metal] complexes were studied in the temperature range 300-500 K as annealed for 24 h at 1008C and after doping with 5% I 2 for comparison.

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