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Resorcinol-based benzoxazine with low polymerization temperature

: Arnebold, Andre; Schorsch, Oliver; Stelten, Johannes; Hartwig, Andreas


Journal of polymer science. A, polymer chemistry 52 (2014), No.12, pp.1693-1699
ISSN: 0360-6376
ISSN: 0887-624X
ISSN: 1099-0518
ISSN: 1096-990X
Journal Article
Fraunhofer IFAM ()

The industrial applications of benzoxazines are limited due to their high curing temperatures. This drawback can be overcome by more reactive precursor compared to conventional benzoxazines or by application of efficient initiators. We report the synthesis of a new resorcinol-based benzoxazine and its cationic polymerization with thermolatent super acids, namely organic sulfonium hexafluoroantimonates. This combination of a reactive precursor and an efficient initiator results in a curing temperature below 100 °C (differential scanning calorimetry onset) which is up to now one of the lowest polymerization temperatures for benzoxazine systems. Furthermore, the thermal stability of the formed polybenzoxazine has not been influenced by the applied initiators.