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Structural investigations of polypropylene glycol (PPG) and isophorone diisocyanate (IPDI)-based polyurethane prepolyrner by 1D and 2D NMR spectroscopy Prabhakar A, Chattopadhyay DK, Jagadeesh B, Raju KVSN Journal of Polymer Science Part A: Polymer Chemistry, 43(6), 1196, 2005 |