| Abstract
| - The kinetically controlled thermal isomerization of the nadimide endo to exo configurationwas investigated in the solid state. Experiments were conducted on 4,4‘-methylene dianiline bis-5-norbornene-2,3-dicarboximide, which is the lowest molar mass compound common to two nadimide end-capped thermosets (the well-known commercially available PMR-15 and a soluble oligobenzhydrolimide).WAXS diffractograms of isomerized moieties, recorded at increasing temperatures, lead to the conclusionthat the isomerization can occur in the crystalline state, through retro-Diels−Alder and Diels−Alderreactions.
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