Effects of High-Temperature Exposure on the Mechanical Properties of Kenaf Composites

Nabilah Afiqah Mohd Radzuan*, Dulina Tholibon , Abu Bakar Sulong*,
Norhamidi Muhamad and Che Hassan Che Haron

Abstract: Automotive parts, including dashboards and trunk covers, are now fabricated through a
compression-molding process in order to produce lightweight products and optimize fuel
consumption. However, their mechanical strength is not compromised to avoid safety issues.
Therefore, this study investigates kenaf-fiber-reinforced polypropylene composites using a simple
combing approach to unidirectionally align kenaf fibers at 0°. The kenaf composite was found to
withstand a maximal temperature of 120 °C. The tensile and flexural strengths of the aligned kenaf
composites (50 and 90 MPa, respectively) were three times higher than those of the commercialized
Product T (between 39 and 30.5 MPa, respectively) at a temperature range of 90 to 120 °C. These
findings clearly showed that the mechanical properties of aligned kenaf fibers fabricated through
the combing technique were able to withstand high operating temperatures (120 °C), and could be
used as an alternative to other commercial natural-fiber products.

Professor Ir. Dr. Abu Bakar Sulong,
Department of Mechanical & Manufacturing Engineering,
Faculty of Engineering & Built Environment,
Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Darul Ehsan
Tel: +603-8921 6678
Fax: +603-8925 9659
Email: abubakar@ukm.edu.my, sulongabubakar@gmail.com

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