Abstract
endo-N-Cyclohexylbicyclo[2,2,1]hept-2-ene-5,6-dicarboximide (CHN or endo-CHN), one of the norbornene derivatives, was prepared from N-cyclohexylmaleimide (CHMI) and cyclopentadiene (CPD) according to the Diels-Alder reaction. Yields of homopolymers were about 10 wt% No CHN could be polymerized in bulk without radical catalysts under 250°C. But at 250°C for 6 h, endo-CHN was converted to exo-CHN in a 75 mol% yield. The polymerization of CHN over 300°C for 1 h gave the polymer in about 100% yield. The molecular weights (M̅w) of polymer insoluble in methanol were 1500 to 2000 and the M̅w of the polymer soluble in methanol was about 700. It was found that the polymer consisted of a mixture among CHN, CHMI and an adduct(II) obtained from CHN and CPD.
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Oishi, T., Morioka, Y. & Fujimoto, M. Polymerization and Copolymerization of endo-N-Cyclohexyl-bicyclo [2,2,1]hept-2-ene-5,6-dicarboximide. Polym J 21, 287–294 (1989). https://doi.org/10.1295/polymj.21.287
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DOI: https://doi.org/10.1295/polymj.21.287