Intrinsically flame retardant bio-based epoxy thermosets: A review

Synthesis of a hyperbranched polyamide oligomer containing DOPO for simultaneously enhancing the flame retardance and glass transition temperature of epoxy resin

“…As is known to all, epoxy resins (EP) are vital thermosetting resins and have been widely used due to their excellent comprehensive performance 1‐3 . However, due to the flammability of EP, there exist potential fire hazards, and they are limited in many cutting‐edge applications where the high flame resistance is required.…”

A Toughening and Anti‐Counterfeiting Benzotriazole‐Based High‐Performance Polymer Film Driven by Appropriate Intermolecular Coordination Force

“…However, the covalent cross‐linking brings an unavoidable drawback: Increasing tensile strength often leads to a decrease in extensibility, and vice versa. [ 4–6 ] The difficulty in achieving the simultaneous improvement of tensile strength and extensibility of epoxy resins has hampered their applications in many fields. In recent years, supramolecular interactions, such as dynamic metal coordination, have been widely introduced into covalent cross‐linking networks to increase the extensibility of materials, because conformation of the polymer chains could be changed from one state to another and energy can be effectively dissipated by the non‐covalent interactions.…”

“…[ 34–37 ] The fracture energy of the PEPTDT‐Cu 2+ film is up to 19.15 J cm −2 , two times than that of PEPTDT film (Figure 3d), and much higher than that of almost traditional epoxy resins. [ 5,6,38–41 ] The origin of the extensibility relies on the dissipation of energy due to the breakage of Cu 2+ ‐BTA coordination bond inside the polymer chains. And the proposed mechanism for the tensile behaviors is illustrated in Figure 3f–i.…”

Solid Wastes Toward Flame Retardants for Polymeric Materials: A Review

“…However, most of them are highly flammable and produce abundant smoke during combustion, which severely threatens humans and the environment; thus, it is necessary to enhance the fire safety of polymers via adding flame retardants (Huo et al, 2020;Xue et al, 2020;Yang et al, 2021a). In the past, flame retardants are mainly derived from petroleum resources, which worsen the depletion of fossil resources (Wang et al, 2019). Based on the sustainable development strategy, many wastes have been reused to replace traditional flame retardants recently, and many important outcomes have been reported, demonstrating that the application of some wastes is an effective way to prepare flame-retardant polymeric materials (Li et al, 2019).…”