Abstract
New block copolyurethanes consisting of 1,2-ethylene bis(4-phenylisocyanate), poly(ether glycol), and ethylenediamine were prepared. The major reactant diisocyanate was first synthesized using ethylene dianiline and phosgene as reagents and removing hydrogen chloride after the reaction. The diisocyanate was then reacted with poly(propylene glycol) (PPG) or poly(tetramethylene ether glycol) (PTMG) and chain extend with ethylene diamine to give the resultant segmented polyurethane elastomers. Both new polyurethanes were then characterized by Fourier transform infrared spectroscopy (FT-IR), Universal tensile tester, simultaneous DTA/TGA (SDT), and differential scanning calorimetry (DSC), etc., to determine the morphological structures, mechanical properties, and thermal stability of these polyurethanes. It was found that the PTMG based copolyurethane has superior mechanical properties and a good thermal stability due to its more cohesive hard domains and a better mutual stabilization effect between the hard and soft segments.
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Wang, TL., Hsieh, TH. Synthesis and Characterization of New Block Copolyurethanes Based on 1,2-Ethylene Bis(4-phenylisocyanate). Polym J 28, 839–844 (1996). https://doi.org/10.1295/polymj.28.839
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DOI: https://doi.org/10.1295/polymj.28.839