Abstract
Polybenzoxazine is a recently developed resin whose structure is similar to traditional phenol resins. It has the same advantages as the traditional phenol resin in the thermal stability and non-flammability, in addition also having more advantages that are not found in the latter resins. A relatively high curing temperature and brittleness, however, are the disadvantages of this resin. This article showed methods to further enhance its specific properties. One method was the preparation of novel monomers that gave it improved properties upon cure : introduction of crosslink sites into the volatile components upon thermal degradation was remarkably effective to enhance high temperature properties. Another one was an alloying technique, which gave polybenzoxazine alloys with various properties depending on the counterpart. Introduction of nanolayered silicates resulting in an organic-inorganic nanocomposite was also effective for improving the performance.
