The Curing Characteristics and Mechanical Properties of Wood Sawdust/Carbon Black Filled Ethylene Propylene Diene Rubber Composites

Prachid SARAMOLEE, Saranyoo BUNLOY

Abstract


In this research work, ethylene propylene diene rubber (EPDM) composites were prepared by incorporating wood sawdust and carbon black on a 2 roll mill. The effect of wood sawdust content on the curing characteristics and mechanical properties of EPDM composites were studied. When the size of wood sawdust was fixed, it was found that wood sawdust content had no effect on scorch time. The cure time, minimum torque and maximum torque increased with increasing wood sawdust content. Increasing the wood sawdust content tended to increase the hardness of the composites, but the tensile strength and elongation at break decreased, heat ageing resistance and ozone resistance slightly decreased. Moreover, the types and concentrations of coupling agents were compared between silane Si69 and epoxidized natural rubber, ENR-50 (50 % mol epoxide groups) on the mechanical properties of EPDM composites. It was found that a silane Si69 concentration of 2.0 wt % of wood sawdust improved the mechanical properties of the EPDM composites but ENR-50 was not able to improve interfacial adhesion between the wood sawdust and EPDM matrix.


Keywords


Wood sawdust, ethylene propylene diene rubber, coupling agent, composites

Full Text:

PDF

References


A Ashori. Wood-plastic composites as promising green-composites for automotive industries. Bioresour. Technol. 2008; 99, 4661-67.

M Abdelmouleh, S Boufi, MN Belgacem and A Dufresne. Short natural-fibre reinforced polyethylene and natural rubber composites: Effect of silane coupling agents and fibres loading. Comp. Sci. Tech. 2007; 67, 1627-39.

MN Belgacem and A Gandini. The surface modification of cellulose fibres for use as reinforcing elements in composite materials. Compos. Int. 2005; 24, 41-75.

MJ John, B Francis, KT Varughese and S Thomas. Effect of chemical modification on properties of hybrid fibre biocomposites. Compos. A. 2008; 39, 352-63.

N Sombatsompop, C Kantala and E Wimolmala. Wood sawdust fibres as a secondary filler in carbon black filled NR vulcanizates. Polym. & Polym. Comp. 2006; 14, 331-47.

H Ismail, RM Jaffri, HD Rozman and ZA Mohd Isahak. Oil palm wood flour reinforced epoxidized natural rubber composites: The effect of filler content and size. Eur. Polym. J. 1997; 33, 1627-32.

SK Chakraborty, DK Setua and SK De. Short jute fiber reinforced carboxylated nitrile rubber. Rubber Chem. Technol. 1982; 55, 1286-307.

H Ismail, S Shuhelmy and MR Edyham. The effects of silane coupling agent on curing characteristics and mechanical properties of bamboo fibre filled natural rubber composites. Eur. Polym. J. 2002; 38, 39-47.


Refbacks

  • There are currently no refbacks.




http://wjst.wu.ac.th/public/site/images/admin/image012_400

Online ISSN: 2228-835X

http://wjst.wu.ac.th

Last updated: 12 August 2019