Scheme 11.
Chemical structure of chain extenders: (a) Joncryl® ADR 4368 copolymer produced by BASF Co, (b) 1,3-phenylene-bis-2-oxazoline, (c) pyromellitic dianhydride, (d) 1,10-carbonyl bis caprolactam, (e) diisocyanate and (f) diepoxide.
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