Biobased Diels-Alder Engineered Network from Furfuryl Alcohol and Epoxy Resin: Preparation and Mechano-Physical Characteristics

摘要

abstract_textpThis study reports the use of Diels-Alder (DA) chemistry to engineer a three-step strategy for making a novel hybrid epoxy-furan network (HDAN), from DGEBA resin and the fully bio-based monomer furfuryl alcohol (FA). Thus, a furfurylated epoxy resin- (FER) was synthesized via reaction of DGEBA and FA. FER was blended with poly(furfuryl alcohol) bio-resin, and in turn crosslinked with a bismaleimide to form HDAN. HDAN showed an inferior mechanical properties but superior thermo-stability compared to those of a control sample i.e. amine-cured DGEBA. Degradability of HDAN network was investigated both by thermal and ultrasonic methods. The results proved that the ultrasonic degradation isan alternative method for the thermal retro-DA reaction. DSC and FTIR analysis confirmed the formation, disconnection and re-formation of DA cross-linkages. Excellent thermo-remending of scratched samples and practical welding of separated sample pieces were also approved by electron microscopy. In conclusion, HDAN was considered as an initiative candidate to be used in advanced applications (e.g., polymer composites...) requiring re-processability, re-mendability and weldability./p/abstract_text