13-Nuclear Magnetic Resonance Studies of Polyetherurethaneureas |
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| Authors: | Alok R Ray Ashis Bhowmick |
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| Institution: | Centre for Biomedical Engineering Indian Institute of Technology Delhi All India Institute of Medical Sciences Hauz Khas , New Delhi, 110016, India |
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| Abstract: | A series of linear polyurethaneureas was prepared by a two-step solution polymerization method. The prepolymer formed by the reaction of 4,4′-diphenyl methane diisocyanate with polyethylene glycol/polypropylene glycol was further chain extended with ethylene diamine/propane diamine/hexane diamine. The chemical shift values of various carbon species of the block copolymer were analyzed and assigned. The products formed due to the presence of water at different stages of polymerization were also characterized. |
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| Keywords: | β‐D L‐Butyrolactone Ring‐opening polymerization Distannoxanes Syndiotactic stereosequences Enantioselectivity |
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