Design and Development of Environmentally Friendly Polybenzoxazine–Silica Hybrid from Renewable Bio-resource

Abstract
In the present work, an attempt has been made to develop polybenzoxazine- silica hybrid through in-situ sol–gel method
using renewable bio-resource raw materials such as cardanol and furfurylamine for high thermal and flame retardant appli�cations. In this context, a new approach has been adopted to incorporate an inorganic component (MPTMS) in to cardanol benzoxazine (BZ–C–F) via chemical interaction between the unsaturated group of cardanol and mercapto group (–SH) of MPTMS by thermally initiated thiol-ene click reaction. The developed PBZ–C–F–silica hybrids were characterized for their molecular structure, thermal and flame resistant properties using modern analytical techniques. Data obtained from thermal and flame retardant studies, it is suggested that the developed PBZ–C–F–silica hybrid can be used in the form of coatings, sealants, encapsulants and matrices for thermally stable and flame retardant applications.