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Possible polymerization reactions of trifunctional benzoxazine T-a. (a) Benzoxazine ring attacked by the para position of aniline; (b) benzoxazine ring attacked by the ortho position of aniline; (c) diphenyl methane bridge formation; (d) formaldehyde release; (e) and (e’) formylation using formaldehyde as the oxidant and reagent; and (f) oxidation.
