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Partial replacement of silica by naturally occurring pumice powder for enhancing mechanical and thermal properties of nitrile rubber cured by electron beam irradiation

Khaled F. El-Nemr (Department of Radiation Chemistry, Egyptian Atomic Energy Authority, Cairo, Egypt)
H. Radi (Department of Radiation Chemistry, Egyptian Atomic Energy Authority, Cairo, Egypt)
Reham H. Helal (Department of Radiation Chemistry, Egyptian Atomic Energy Authority, Cairo, Egypt)

Pigment & Resin Technology

ISSN: 0369-9420

Article publication date: 19 December 2022

18

Abstract

Purpose

One of the low-cost minerals that can be used as reinforcing filler in polymer industry is pumice powder. Pumice is a highly porous volcanic glass formed during explosive eruptions. This pumice has received significant interest because of its large surface area with various polar groups and can be processed easily.

Design/methodology/approach

This study is carried out to investigate the effect of partial replacement of silica (as traditional filler) by naturally occurring pumice powder to improve the thermal and mechanical properties of nitrile butadiene rubber cured with electron beam radiation (doses from 25 to 150 kGy).

Findings

The results indicated that the addition of pumice powder increase the tensile strength at lower doses up to 75 kGy (especially at concentration of 5 phr). Besides, an improvement in the thermal stability was attained with the addition of pumice powder.

Originality/value

Pumice powder is volcanic-based alumina and silica which is mainly composed of SiO2. It has porous structure which is formed by dissolved gases precipitated during the cooling as the lava hurtles through air. Due to its porous structure, it has low density and high thermal insulation. It also has high temperature and chemical resistance, for these reasons it became preferable material to be used as filler in the plastic and rubber industry.

Keywords

Acknowledgements

Declaration of interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Citation

El-Nemr, K.F., Radi, H. and Helal, R.H. (2022), "Partial replacement of silica by naturally occurring pumice powder for enhancing mechanical and thermal properties of nitrile rubber cured by electron beam irradiation", Pigment & Resin Technology, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/PRT-09-2022-0105

Publisher

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Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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