Synthesis of New Polyurethanes Based on 2,3-Dihidro-1,4-Phthalazinedione
نویسندگان
1 College of Chemistry, Shahrood University of Technology, Shahrood, 3619995161, Iran
2 College of Chemistry, Shahrood University of Technology, Shahrood, 3619995161, Iran
3 Faculty of science, Department of Chemistry, Golestan University, Gorgan, P. O. Box 155, Iran
4 College of Chemistry, Shahrood University of Technology, Shahrood, 3619995161, Iran
doi
10.22034/ajca.2021.286663.1262چکیده
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.
