Chemical Industry and Chemical Engineering Quarterly 2013 Volume 19, Issue 2, Pages: 281-293
https://doi.org/10.2298/CICEQ111225062A
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Effect of micro sized marble sludge on physical properties of natural rubber composites
Ahmed Khalil (Applied Chemistry Research Centre PCSIR Laboratories Complex, Karachi., Pakistan)
Nizami Shaikh Sirajuddin (University of Karachi, Department of Chemistry, Karachi., Pakistan)
Raza Nudrat Zahid (Applied Chemistry Research Centre PCSIR Laboratories Complex, Karachi., Pakistan)
Mahmood Khalid (Applied Chemistry Research Centre PCSIR Laboratories Complex, Karachi., Pakistan)
Marble waste as sludge is collected from Marble industry, as a way of solving
the environmental problem of industrial waste. The sludge was dried, ground
and passed through desire sieves (10, 15, 20, 37 and 75 μm), This powder was
characterized by the X-ray fluorescence technique and then incorporated in
the formulation of NR composites with different loading of micro sized MS
particles (20, 40, 60, 80 and 100 parts per hundred of rubber, phr). The cure
characteristics, mechanical properties and swelling properties of MS/NR
composites were evaluated. Results indicate that minimum torque, maximum
torque, tensile strength, modulus, tear strength, hardness, crosslink density
were increased while the scorch time, cure time, cure rate, cure rate index
(CRI), elongation at break, compression set, rebound resilience, abrasion
loss, swelling coefficient, average molecular weight and filler-rubber
interaction decrease with increasing MS loading.
Keywords: natural rubber, composites, marble sludge, filler, cure characteristics, mechanical properties, thermal aging