TY - JOUR ID - 134379 TI - Synthesis of New Polyurethanes Based on 2,3-Dihidro-1,4-Phthalazinedione JO - Advanced Journal of Chemistry, Section A JA - AJCA LA - en SN - 2645-7768 AU - Mighani, Hossein AU - Sajadinia, Seied Morteza AU - Nasr-Isfahani, Hossein AU - Bakherad, Mohammad AD - Faculty of science, Department of Chemistry, Golestan University, Gorgan, P. O. Box 155, Iran AD - College of Chemistry, Shahrood University of Technology, Shahrood, 3619995161, Iran Y1 - 2021 PY - 2021 VL - 4 IS - 4 SP - 300 EP - 307 KW - Polyurethanes KW - IR-Viscometery KW - Thermal analysis KW - Differential thermal gravimetric analysis DO - 10.22034/ajca.2021.286663.1262 N2 - In this work, to synthesis the 2-(2-hydroxy ethyle)-2,3-dihydro-1,4-phthalazinedione and 2,3-bis(2-hydroxyethyle)-2,3-dihydro-1,4-phthalazinedione, 2-boromoethanol was reacted with phthalhydrazide in DMAc at presence of triethylamine in mole ratio of 1.5:1 and 3:1 respectively. The structure of the monomers was evaluated using the IR and 1H-NMR spectra. New polyurethanes were synthesized by reaction of the monomers with various diisocyanates including, tolylene diisocyanate, isophorane diisocyanate and hexamethylene diisocyanate. The measured viscosity for these polymers was found to be at the range of 0.45-0.6 dlg-1. The structure of the polymers was proved by IR, 1HNMR spectra and CHN analysis. The TGA and DTG results confirmed high thermal stability for the synthesized polymers. UR - http://www.ajchem-a.com/article_134379.html L1 - http://www.ajchem-a.com/article_134379_b793f9305daae334a8ce43e1bc899d2d.pdf ER -