Researchers have developed a polymer composite that combines vibration damping with reliable strain sensing. The material uses a thermoplastic polyurethane matrix containing UPy (2-ureido-4[1H]-pyrimidinone) units, which form reversible quadruple hydrogen bonds. These molecular links can break ...

Source: [Phys.org](https://phys.org/news/2026-08-composite-retains-response-strain.html)

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