Development and Characterization of EPDM/PP TPV Composites via DOE-Based Screw Profile Optimization and Nano-Silica Reinforcement
발표자
강영하 (충남대학교 )
연구책임자
구자승 (충남대)
공동저자
강영하 (충남대학교 ), 구자승 (충남대)
초록
내용
TPV combines EPDM rubber's elasticity with PP processability. Its performance relies on a morphology where cross-linked EPDM is dispersed in a PP matrix. A key challenge is achieving uniform dispersion without PP degradation, which depends on screw profile design. This research optimized the screw profile via Ludovic simulation and nano-silica. Through DOE, forward kneading blocks were replaced with reverse-kneading blocks for intensified shear and better mixing. Consequently, TPVs showed improved properties: tensile strength rose by 1–2 MPa and modulus by ~40 MPa. Rheological analysis confirmed this resulted from higher crosslink density via filler–rubber interactions. With 10 phr of silica, the torque difference rose from 0.116 N·m to 0.200 N·m. In conclusion, combining Ludovic-based optimization with nano-silica reinforcement improves TPV performance for automotive applications.