A new design concept for natural rubber compounds using silanised precipitated silica

Ansarifar A., . and Azhar A., . and Song M, . A new design concept for natural rubber compounds using silanised precipitated silica. pp. 129-152. ISSN 1511-1768

The reinforcing effect of 30 p.h.r. silanised precipitated amorphous white silica filler on the technical properties of a sulphur cured natural rubber compound with a sulphur to accelerator ratio of about 0.046 was studied. The surfaces of the silica were pre-treated with bis3-triethoxysilylpropyl-)tetrasulphane (TESPT) a bifunctional organosilane to prevent the silica from interfering with the reaction mechanism of the sulphur cure system in the rubber. This study showed that hardness tensile strength abrasion resistance stored energy density at rupture and cohesive tear strength of the rubber were enhanced substantially but elongation at break and cyclic fatigue life deteriorated after the filler was added to the rubber. Interestingly the technical properties of the rubber improved even more significantly without the added sulphur and by optimising the reaction between the rubber reactive tetrasulphane groups of TESPT and the rubber compound. The improved properties were due to the fine dispersion of the filler in the rubber matrix and also the strong rubber/TESPT interaction. The latter was produced by the addition of 4.4 p.h.r. of a sulphenamide type accelerator to the rubber compound.

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Abstract

The reinforcing effect of 30 p.h.r. silanised precipitated amorphous white silica filler on the technical properties of a sulphur cured natural rubber compound with a sulphur to accelerator ratio of about 0.046 was studied. The surfaces of the silica were pre-treated with bis3-triethoxysilylpropyl-)tetrasulphane (TESPT) a bifunctional organosilane to prevent the silica from interfering with the reaction mechanism of the sulphur cure system in the rubber. This study showed that hardness tensile strength abrasion resistance stored energy density at rupture and cohesive tear strength of the rubber were enhanced substantially but elongation at break and cyclic fatigue life deteriorated after the filler was added to the rubber. Interestingly the technical properties of the rubber improved even more significantly without the added sulphur and by optimising the reaction between the rubber reactive tetrasulphane groups of TESPT and the rubber compound. The improved properties were due to the fine dispersion of the filler in the rubber matrix and also the strong rubber/TESPT interaction. The latter was produced by the addition of 4.4 p.h.r. of a sulphenamide type accelerator to the rubber compound.

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Item Type:	Article
AGROVOC Term:	Natural rubber
AGROVOC Term:	Technical properties
AGROVOC Term:	Chemical precipitation
AGROVOC Term:	Silica
AGROVOC Term:	Dispersion (application methods)
AGROVOC Term:	Sulphur
AGROVOC Term:	Mechanical properties
AGROVOC Term:	Technical properties
AGROVOC Term:	Tensile strength
AGROVOC Term:	Rubber industry
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23156

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