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Polyurethane foams (PU) are used in many automotive applications due to their durability and sound absorption properties. This paper examines the effects of reusing predominantly silica‐filled thermoset composites as a reinforcing agent when ground to a particle size less than 106 μm (0%, 2.5%, 5%, 7.5% by wt%) on mechanical, physical, thermal, and sound absorption properties of PU foam. Young's modulus...