2.4. Cure characteristics
The cure characteristics of the silica-filled NR compounds
were obtained using a Monsanto Moving Die
Rheometer (MDR 2000), which was used to determine the
scorch time (ts2) cure time (t90), and torque difference
(MHdML) according to ISO 3417. Samples of the respective
compounds were tested at 150 C. The compounds were
subsequently compression moulded using a stainless steel
mould at 150 C with a pressure of 10 MPa using a laboratory
hot-press based on the respective curing times.