Preparation and characterization of ferrocenyl-terminated hyperbranched polyesters/epoxy resin composite

Ferrocenyl-terminated hyperbranched polyesters/epoxy resin (HBPE-Fc/E-51) composites with mechanical and electromagnetic performance were prepared with the third generation of epoxidized hyperbranched polyesters (EHBP) toughened epoxy resin as matrix material, and ferrocenyl-terminated hyperbranched polyesters (HBPE-Fc) as microwave-absorber. The mechanics and electromagnetic properties of the composites were investigated by mechanics performance tests, SEM and the vector network analyzer. The results indicate that lower content of HBPE-Fc can improve the tensile and impact performance of epoxy resin. Compared with base curing system. When the mass fraction of G4 HBPE-Fc is 2%, the tensile strength, tensile rupture elongation and impact strength increase by 21.81%, 34.32% and 15.41%, respectively. The analysis of tensile fracture surfaces shows that the composites with HBPE-Fc were judged for ductile fracture with the glass transition temperatures for the composites of 105.29-130.27 ℃, and the composites also possess certain electromagnetic properties.