By extension, the derivatives are also referred to as oxazines; examples includeifosfamide andmorpholine (tetrahydro-1,4-oxazine). A commercially available dihydro-1,3-oxazine is a reagent in theMeyers synthesis of aldehydes. Fluorescent dyes such asNile red andNile blue are based on the aromatic compoundbenzophenoxazine. Cinnabarine and cinnabaric acid are two naturally occurring dioxazines, being derived from biodegradation oftryptophan.[2]
Benzoxazine resin synthetic pathway, structure and cure mechanism
Benzoxazines are bicyclic compounds formed by the ring fusion of a benzene ring with an oxazine.Polybenzoxazines are a class of polymers formed by the reaction of phenols, formaldehyde, and primary amines which on heating to ~200 °C (~400 °F) polymerise to produce polybenzoxazine networks.[5] The resulting high molecular weightthermoset polymer matrix composites are used where enhanced mechanical performance, flame and fire resistance compared to epoxy and phenolic resins is required.[6]
^Tietze R, Chaudhari M (2011). "Advanced benzoxazine chemistries provide improved performance in a broad range of applications". In Ishida H, Agag T (eds.).Handbook of Benzoxazine Resins. Elsevier B.V. pp. 595–604.doi:10.1016/B978-0-444-53790-4.00079-5.ISBN978-0-444-53790-4.
