Rani, Joseph; Dr.Joseph,Francis D(Cochin University of Science and Technology, December , 1987)
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Abstract:
There are a large number of commercial examples and property advantages of immiscible elastomer blends.73 Blends of natural rubber (NR) and polybutadiene (BR) have shown various
advantages including heat stability, improved elasticity and abrasion resistance. Ethylene-propylene-diene-rubber (EPDM) blended with styrene-butadiene rubber (SBR) has shown improvements in ozone and chemical resistance with better compression set properties. Blends of EPDM and nitrile rubber (NBR) have been cited as a compromise for obtaining moderate oil and ozone resistance with improved low temperature properties. Neoprene (CR)/BR blends offer improved low temperature properties and abrasion resistance with better processing characteristics etc. However, in many of the commercial two-phase elastomer blends, segregation of the crosslinking agents, carbon black or antioxidants preferentially into one phase
can result in failure to attain optimum properties. Soluble and insoluble compounding ingredients are found to be preferentially concentrated in one phase. The balance of optimum curing of both phases therefore presents a difficult problem. It has been the aim of this study to improve the
performance of commercially important elastomer blends such as natural rubber (NR)/styrene-butadiene rubber (SBR) and natural rubber/polybutadiene rubber (BR) by industrially viable procedures
Description:
Department Of Polymer Science And Rubber technology
Sree Remya, T. S.; Dr. Swapankumar Ghosh(Cochin University of Science and Technology, February 12, 2015)
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Abstract:
The prospective impact of nanomaterials in science and technology has followed an
increasing trend due to their unique chemical and physical properties compared to bulk.
Significant advances in current technologies in areas such as clean energy production,
electronics, medicine, and environment have fuelled major research and development
efforts in nanotechnology around the world. This leads to the opportunity to use such
nanostructured materials in novel applications and devices. Ceria, zirconia, alumina and
titania are some of the major oxides which find vast applications as a nanomaterial on a
wider side.