Empa researchers have developed an epoxy resin that can be repaired and recycled, in addition to being flame-retardant and mechanically strong. Potential applications range from coating for wooden flooring to composites in aerospace and railways.
, the polymer chains are closely crosslinked. These chemical crosslinks make melting impossible. Once the plastic has hardened, it can no longer be reshaped.
"We originally synthesized this molecule as a flame retardant," says co-inventor of this technology and Empa scientist Wenyu Wu Klingler. However, the bond the molecule forms with the polymer chains of the epoxy resin is dynamic and can be broken under certain conditions. This loosens the crosslinking of theSuch materials, also known as vitrimers, have only been known for about ten years and are considered particularly promising.
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