Paper Information

Journal:   IRANIAN POLYMER JOURNAL (ENGLISH)   March-April 2004 , Volume 13 , Number 2; Page(s) 85 To 91.
 
Paper: 

SYNERGISM OF XANTHATE/DITHIOCARBAMATE ACCELERATOR IN CARBON BLACK FILLED NR COMPOUNDS

 
 
Author(s):  PALATY S., JOSEPH R.*
 
* Department of Chemistry, Bharata Mata College, Thrikkakara, Cochin 682021, Kerala, India
 
Abstract: 

Zinc salts of ethyl, isopropyl and butyl xanthates were prepared in the laboratory. The effect of these xanthates with zinc diethyldithiocarbamate (ZDC) on the vulcanization of HAF filled NR compound has been studied at different temperatures. The rubber compounds with the three xanthate accelerators and ZDC were cured at various temperatures from 60°C–150°C. The sheets were moulded and properties such as tensile strength, tear strength, cross-link density, elongation-at-break, compression set, heat build up, abrasion resistance, flex resistance etc. were evaluated. The properties showed that zinc xanthate/ZDC accelerator combination has positive synergistic effect on the mechanical properties of NR compounds. The curing of HAF filled NR compound containing zinc xanthate/ZDC is slightly slower than the curing of the corresponding gum compounds. It is seen that, by gradually increasing the amount of the accelerator, the cure time of black filled NR compound can be made equal to that of the gum compound.

 
Keyword(s): NATURAL RUBBER, LOW TEMPERATURE CURING, MECHANICAL PROPERTIES, XANTHATE ACCELERATORS, SYNERGISM
 
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