New self-healing plastic outperforms steel in strength tests

US researchers from Texas A&M University and the University of Tulsa have developed a new recyclable carbon-fiber plastic composite called Aromatic Thermosetting Copolyester (ATSP) that exhibits self-healing properties and outperforms steel in strength tests. Led by Dr. Mohammad Naraghi and funded by the US Department of Defense, ATSP can repair cracks and deformations when heated, restoring or even improving its original strength. This adaptive material shows promise for critical applications in aerospace, defense, and automotive industries, where it can enhance safety by enabling on-demand healing of damaged components and potentially restoring vehicle shapes after collisions. ATSP combines the flexibility of thermoplastics with the stability of thermosets, and when reinforced with carbon fibers, it becomes several times stronger than steel while remaining lighter than aluminum. The material’s chemistry remains stable over multiple reshaping cycles, making it a sustainable alternative to traditional plastics by reducing waste without sacrificing durability. Laboratory tests demonstrated that ATSP could endure hundreds of stress and