Polybenzoxazine (PBZ) resin with excellent thermal mechanical properties and molecular design flexibility for advanced composites has attracted more attention in last decade. In recent years, polymers made from renewable resource have been drawn great attention. Some efforts have been made to prepare benzoxazines from various bio-based raw materials. Herein, we aim to prepare benzoxazine resins from bio-based amine such as decane diamine, furfurylamine and 1,4-butanediamine, and bio-based phenolic derivatives such as cardanol, guaiacol, eugenol. Those benzoxazines were characterized by FTIR, GPC, 1H NMR, MS, DSC, TGA and DMTA. Then bisphenol A benzoxazine (B-a) resin were modified by bio-based benzoxazines via solution blending method. The properties of cured B-a resins modified by bio-based benzoxazines were characterized by TGA, DMTA etc. The results shown that impact strength of cured resins were great improved by the bio-based benzoxazines. The bio-based benzoxazines/lignin blend were prepared via solution blending with small portion of lignin. The mechanism of curing of benzoxazine/lignin blend were tested by NMR and FTIR. The thermal properties of cured benzoxazine/lignin blend were characterized by TGA, DMTA etc. The results shown that curing temperature of the blend were decreased and the char yield increased for the introduction of lignin.

Preparation and characterization of fully biobased benzoxazines

246th National Meeting (2013)

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