NMR CHARACTERIZATION OF DICYCLOPENTADIENE RESINS AND POLYDICYCLOPENTADIENES

Dicyclopentadiene (DCPD) thermosetting resin has been characterized by nuclear magnetic resonance (NMR) technique. The main monomer in DCPD resin is found to be in endo isomer form. Solid-state C-13 cross polar ization/magic angle spinning and C-13 high-power decoupling NMR techni ques have been applied for characterization of polymer network during curing and after cure. NMR spectra of carbon atoms in rigid phase and in mobile phase have been investigated. The possibility of three struc tural elements in polymer network was discussed. Solid-state NMR techn ique was applied to study of poly-DCPD oxidation. (C) 1996 John Wiley & Sons, Inc.