A Polyurethane Elastomer With Broad Damping Temperature Range Achieved by Incorporating Bisphenol A Units in the Backbone

ABSTRACT The advancement of industrial technology has led to an increasing number of high‐power vibration equipment; however, the resulting vibration and noise can impair the performance and shorten the lifespan of electronic instruments. Damping materials can effectively suppress vibration and reduce noise, thereby extending the service life of mechanical systems. To broaden the effective damping temperature range (Δ T ) of polyurethane elastomers, several strategies can be employed, including introducing pendant chain structures into the polyurethane matrix, physically blending with resins that have different glass transition temperatures ( T g), or adjusting the crosslinking density of the polyurethane elastomer. In this study, we adopted a precise molecular design approach by incorporating bisphenol A polyoxypropylene ether (BPAPO)—a compound containing bisphenol A‐like structures—into the soft segments. This modification introduced rigid benzene rings into the polymer backbone, effectively restricting the internal rotation of chain segments. The resulting elastomer (PT) exhibited a significant improvement in tensile strength, increasing from 0.344 to 0.897 MPa, and the effective damping temperature range expanded from 66.2°C (for the unmodified material) to 82.2°C for the PT‐1 elastomer. These results demonstrate that the series of PT elastomers exhibit outstanding performance as polyurethane damping materials, substantially broadening their potential application prospects.