Vanillin-Derived High-Performance Flame Retardant Epoxy Resins: Facile Synthesis and Properties

• DOI: 10.1021/acs.macromol.7b00097
• Publication Date: 2017-02-24T19:22:56Z
• Authors: Sheng Wang; Songqi Ma; Chenxiang Xu; Yuan Liu; Jinyue Dai; Zongbao Wang; Xiaoqing Liu; Jing Chen; Xiaobin Shen; Jingjing Wei; Jin Zhu
• Keywords: 02 engineering and technology; 0210 nano-technology

Lignin derivative vanillin when coupled with diamines and diethyl phosphite followed by reaction with echichlorohydrin yields high-performance flame retardant epoxy resins. Biorenewable and environment-friendly flame retardant alternatives to bisphenol A epoxy resins (having plenty of applications such as coatings, adhesives, composites, etc.) have captured great attention due to their ecological and economic necessity. Vanillin, an industrial scale monoaromatic compound from lignin, is a promising sustainable candidate for high-performance polymers, while synthesis of diepoxies is challenging. Meanwhile, bio-based epoxy resins combining high performance and excellent fire resistance are more difficult to be achieved. In this paper, two novel bio-based epoxy monomers EP1 and EP2 were synthesized by one-pot reaction containing Schiff base formation and phosphorus–hydrogen addition between vanillin, diamines, and diethyl phosphite, followed by reacting with epichlorohydrin. Their reactivities are similar to...