Nadic end-capped imide

The studies of the crosslinking reaction of a nadic end-capped imide, N, N -(ox-ydi-3,4 -phenylene)bis(5-norbornene-2,3-dicarboximide) in thermal and micro-wave processes were performed by Scola at al. (Fig. 14) [80]. The investigated starting resin (RP-46) consisted of polyimide precursors, 3,3, 4,4 -benzophenonetet-racarboxylic acid methyl ester (BTDE), 3,4 -oxydianiline (3,4 -ODA), and end capping reagent, 5-norbornene-2,3-dicarboxylic acid monomethyl ester (NE). The cure process proceeds in two steps imidization (1) and a thermally induced (retro-diene Diels-Alder) decomposition-recombination crosslinking step (2) (Fig. 14). 

Figure 48 Crosslinking reaction of nadic end-capped imides.

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