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Abstract

Compression ultrasonic velocity, longitudinal ultrasonic absorption, and heat of mixing for NR-BR, NR, NBR, and NR-IIR rubber blends were measured. Results show the applicability of examining the compatibility degree by using longitudinal ultrasonic absorption techniques. Results showed that NR-BR blends are compatible, whereas NR-NBR and NR-IIR blends are semicompatible and incompatible, respectively.