Building and origin of bio-based bismaleimide resins with good processability, high thermal, and mechanical properties

摘要

Bio-based high performance thermosetting resins have been urgently required by cutting-edge fields for meeting sustainable development. A new kind of high performance thermosetting resins (BA-n) with good processability, high thermal resistance, and mechanical properties was developed based on 4,4'-bismaleimidodiphenylmethane (BDM) and renewable bis(5-allyloxy)-4-methoxy-2-methylphenyl) methane (ABE) from bio-based lignin derivative. The effect of the molar ratio of allyl to imide (n) on structures and properties of BA resins were systematically researched. BA-n resins have much better processability, thermal, and mechanical properties than their petroleum-based counterparts, 2,20-diallylbisphenol A-modified BDM (BD-n) resins. Compared with BD-0.86, the best available bismaleimide (BMI) resin, BA-0.86 not only has 6 h longer process window and 13.7 degrees C higher glass transition temperature, but also owns the highest flexural strength and modulus among all bio-based allyl compound-modified BMI resins reported. The origin behind these attractive performances of BA resins is revealed by discussing the unique crosslinked structure. (C) 2017 Wiley Periodicals, Inc.