Reinforcement Of Natural Rubber And Epoxidized Natural Rubbers \Vith Amine-Treated Silica
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Date
2002-05
Authors
SURYA, INDRA
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Abstract
The feasibility study of utilising amine-treated silica on reinforcement of S~fRL,
E~"R 25 and ENR 50 by using semi-efficient (semi-EV) system was carried out. The
amine-treated silica was prepared by treating normal silica filler in a butylamine
solution with a certain pH.
An investigation was carried, out to compare the reinforcement effect of aminetreated
silica with that of normal silica with and without the addition of bis
(triethoxysilylpropyl)tetrasulphide or TESPT, and with that of carbon black (HAF 330)
on cure characteristics and properties of those rubbers. It was found that amine-treated
silica gave shorter cure time than normal silica with and without the addition ofTESPT,
and closer cure time to carbon black. .
It was also found that amine-treated silica showed better tensile strength, mechanical
and ageing properties than other fillers, when compounded with SMR-L. On ENRs,
amine-treated silica caused better tensile properties, abrasion and ageing resistances
than normal silica with and without the addition of TESPT, and a little poorer in those
properties than carbon black.
Investigation on reinforcing efficiencies of those fillers on the rubbers found that
the higher reinforcing efficiency of amine-treated silica is attributed to smaller particlesize
and better dispersion of amine-treated silica in the rubbers phases when compared
with normal silica with and without TESPT.
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Keywords
Reinforcement Of Natural Rubber , And Epoxidized Natural Rubbers \Vith Amine-Treated Silica