Journal of Industrial and Engineering Chemistry

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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TESPT and Different Aliphatic Silane Treated Silica Compounds Effects on Silica Agglomerate Dispersion and on Processability During Mixing in EPDM

Kim, Kwang-Jea;White, James L.

  • Published : 2001.01.25

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Abstract

Treated silica particles with four different silane coupling agents with different silane chain length were compounded in EPDM using an internal mixer, and their agglomerate sizes, viscosity, and extrudate swell were investigated. The treated silica compounds showed a smaller agglomerate size, lower viscosity, and lower swell reduction than the untreated silica compound after equivalent mixing times. The bis(triethoxysilylpropyl)tetrasulfane (TESPT) treated silica compound exhibited a lower viscosity than the other treated compounds, however exhibited a large agglomerate size, whereas the short chain silane (SN203) treated compounds exhibited a smaller agglomerate size with a higher viscosity. The long chain silane (SN116) treated compound exhibited a lower viscosity with a better dispersion than the TESPT treated compound. TESPT acted as a processing aid in the silica/EPDM compounds. The extrudate swell reduction of the TESPT, SA2T, SN203, SN208, and SN116 treated silica compounds was less than that of the untreated silica compounds.

Keywords

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