摘要
Preparation of thermoplastic elastomer of Polypropylene-SIR 10 rubber blends with addition of DCP （dicumil peroxide） as initiator and DVB （divinylbenzene） as a crosslinker has been done. Blends of Polypropylene-SIR 10 rubber with variation of weight 60/40 （w/w）, 50/50 （w/w） and 40/60 （w/w） with variation concentration of DCP and DVB 1 phr, 2 phr and 3 phr were mixed into internal mixer at temperature 180 ℃. Then, the blends were pressed at 185 ℃ and specimen were molded according to the ASTM D638. The characterization were carried out based on tensile strength testing, crosslink percentage, morphology surface analysis with SEM and fungtional group analysis with FTIR （Fourier Transform Infra Red）. The result showed that the blends of Polypropilene-SIR 10 rubber 60/40 （w/w） with 2 phr DCP and 1 phr DVB posses a higher tensile strength with value 1.37 Kgf/mm2 and value of elongation at break 17.58%, and value of percentage crosslink 82.4%. The result of morphology test with SEM showed that the blend was well homogenous. Spectra analysis with FT-IR has shown physical interaction among components of the blends.
