Effect of molecular weight on the properties of liquid epoxidised natural rubber acrylate (Lenra )/silica hybrid composites

Eda Yuhana Ariffin, and Azizan Ahmad, and Dahlan Hj Mohd, and Mahathir Mohamed, (2011) Effect of molecular weight on the properties of liquid epoxidised natural rubber acrylate (Lenra )/silica hybrid composites. Sains Malaysiana, 40 (7). pp. 743-748. ISSN 0126-6039

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Abstract

This paper reports on the effect of molecular weight on the morphological and mechanical properties of liquid epoxidised natural rubber acrylate (LENRA)/silica hybrid composites prepared by sol-gel technique. The sol-gel reaction was conducted at different concentration of tetraethylorthosilicate (TEOS), used as a precursor of silica. TEOS were introduced in 10, 20, 30, 40 and 50 parts per hundred rubber (phr) in the composites. Two different molecular weights of ENR were used to study the effect of molecular weight on the mechanical and morphological properties of the compounds. These compounds were cured by ultraviolet (UV) irradiation. The mechanical properties were studied through pendulum hardness and scratch tests. Higher molecular weight of ENR showed better mechanical properties than lower molecular weight. Transmission electron microscope was used to determine the silica size and to study the distribution and dispersion of the silica particles. High molecular weight showed greater distribution and dispersion of silica particles with diameter of 13 nm–256 nm. Morphological and mechanical properties of LENRA/silica hybrid composites were improved by using high molecular weight of ENR

Item Type:Article
Keywords:Epoxidised natural rubber; molecular weight; organic-inorganic hybrid; sol-gel technique
Journal:Sains Malaysiana
ID Code:2562
Deposited By: Mr Azam
Deposited On:04 Aug 2011 06:37
Last Modified:14 Dec 2016 06:31

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