Preparation and Properties of Organokaolin Natural Rubber Latex Base Vulcanisate

Abstract

Natural rubber (NR) latex-organokaolin compounds have been investigated. The intercalated kaolin (100% CEC-CTAB of clay) was used in aqueous rubber latex dispersion, from which a coagulum was obtained. The coagulum was used in natural rubber compounds and evaluated for its cure: scorch; t s 1, optimum cure; t 90 min, minimum (ML) and maximum (MH) torque and mechano-physical properties viz: M100, M300, EB (%), hardness and abrasion in mg/1000 rev. The scorch and optimum cure indicated a progressive drop with addition of organokaolin in natural rubber latex based compounds. Vulcanisate mechanical properties generally showed increase as organokaolin loading increased. A correlation between the measure of extent of vulcanization (MH-ML) and properties such as tensile strength, elongation at break, abrasion and hardness showed that the extent of crosslinking as a result of rubber-filler interaction of the natural rubber based compounds increased as organokaolin loading increased.

Comparation of Rubber Milling Process to Produce Natural Rubber Coumpounds Using Modified and Unmodified Local Clay Filler

“…Local clay is also material that contains quite a lot of silica 50.83 -75.29% [5], which can automatically be semi-reinforced. Research on the use of clay as a filler against rubber compounds has been carried out [6][7][8][9][10][11][12][13][14][15][16][17][18] including modification of clay [19][20][21][22][23][24][25][26][27][28][29][30][31].…”