Journal
POLYMER TESTING
Volume 37, Issue -, Pages 36-44Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2014.04.008
Keywords
Pineapple leaf fiber; Natural fiber; Thermoplastic elastomer; Reinforcement; Matrix orientation
Funding
- Center of Excellence for Innovation in Chemistry (PERCH-CIC), Office of the Higher Education Commission, Ministry of Education
- Synchrotron Light Research Institute (SLRI)
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Composites of preferentially aligned pineapple leaf fiber (PALF) and Santoprene, a thermoplastic elastomer, were studied. PALF filled Santoprene composites were first prepared by melt mixing on a two-roll mill with different PALF contents. Then, the molten mixture was sheeted out using a narrow nip with some stretching to give prepregs with PALF preferentially aligned along the machine direction. These prepregs were then stacked and compression molded at 175 degrees C and 195 degrees C to form composite sheets. Wide angle x-ray scattering patterns revealed that the prepregs had matrix orientation which still remained after molding at 175 degrees C but not at 195 degrees C. Tensile and tear properties in directions parallel and perpendicular to the fiber axis were measured. Modulus at 10% strain and tear strength in the longitudinal direction increased significantly with increasing PALF content (up to 15%), while tensile strength and elongation at break decreased. The effect of PALF content was less significant in the transverse direction. In addition, compression molding temperature also affected all these properties but to different extents. The two most affected properties were modulus and tear strength in the longitudinal direction. Composites prepared at 175 degrees C displayed significantly higher modulus and tear strength than that prepared at 195 degrees C with the same PALF content. This was attributed to the remnant matrix orientation. (C) 2014 Elsevier Ltd. All rights reserved.
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