This paper has been written to revirw for toughening bismaleimides. The recent advancemet of bismaleimide resin systems with improved toughness is summarized. The methods for toughening bismaleimide such as rubber toughening of bismaleimide
copolymerizing with allylphenyl compounds
Michael addition chain extension
taking thermoplastics as toughening modifiers
using bismaleimide-modified epoxy resins and synthesizing chain-extended bismaleimide are reviewed.