Empirical Study of the Cure of Commercially Available Benzoxazines and Initiators Using Thermo-mechanical and Spectroscopic Techniques

摘要

High temperature resistant, mechanically tough and lightweight polymers have been in demand over the last few decades for high-speed air craft structures and structural components of aerospace structures and vehicles [1]. Polybenzoxazines are a relatively new class of phenolic-type polymeric resins [2], which, like phenolic resins display desirable FST characteristics and produce a high char yield (up to 80%), and good mechanical strength (100-125 MPa). As well as other desirable properties including near-zero volume shrinkage on cure, T_g values in excess of the cure temperature (170-340 °C), and wide molecular design flexibility, but importantly at a lower cost than many competitor resins, making them an attractive alternative to epoxy and phenolic resins.