Open AccessRheological Properties of Carbon Black/Silica Hybrid Filler in Acrylonitrile Butadiene Rubber
Author(s) -
MH Mohd Hasan,
JK Kler,
Siew Kooi Ong,
S. Manroshan
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/548/1/012005
Subject(s) - masterbatch , materials science , carbon black , precipitated silica , filler (materials) , composite material , natural rubber , particle size , compounding , mooney viscosity , ball mill , chemical engineering , nanocomposite , polymer , engineering , copolymer
Filler is a common additive added into rubber vulcanizate to achieve reinforcing performance. Typically, filler is compounded via two-roll mill which results in filler agglomeration and lower reinforcing efficiency. To gain higher reinforcing efficiency, filler agglomeration must be minimized via masterbatch preparation. This study investigates colloidal stability of carbon black/silica (CB/SiO 2 ) hybrid filler and effectiveness between typical compounding and masterbatch process for NBR vulcanizate production. CB/SiO 2 hybrid filler was fixed at 20 wt.% with ratios of 100/0, 75/25, 50/50, 25/75 and 0/100 were dispersed separately in sodium hydroxide (NaOH) via ball milling. The zeta potential, particle size and viscosity results showed CB and SiO 2 dispersions stabilized after 48 hours of ball milling. NBR masterbatch with 50/50 ratio has highest flow resistance. SiO 2 reinforced NBR masterbatch showed higher flow resistance compared to CB due to finer silica particle size. However, scorch and cure time for SiO 2 reinforced NBR is slower than CB reinforced NBR as silica deactivate the accelerator. CB/SiO 2 at 50/50 has highest T max and ΔT while 100/0 and 0/100 has insignificant differences. As conclusion, CB and SiO 2 dispersions were stable based on zeta potential analysis and particle size reduced as ball milling time increased.