e-ISSN 2231-8542
ISSN 1511-3701

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The Role of Secondary Filler on Fracture Toughness and Impact Strength of HDPE/Clay Nanocomposites

Anizah Kalam, Rahilah Kamarudzaman, Koay Mei Hyie, Aidah Jumahat and Noor Leha Abdul Rahman

Pertanika Journal of Tropical Agricultural Science, Volume 25, Issue S, August 2017

Keywords: Alkali treated, hybrid nanocomposite, oil palm empty fruit bunch (OPEFB) fiber, polyethylene, polymer

Published on: 26 Feb 2018

In this study, oil palm fruit bunch fiber (OPEFB) was used as a secondary filler in HDPE/clay nanocomposites. The composites were prepared by melt compounding, containing high density polyethylene (HDPE), OPEFB fibers, Maleic anhydride grafted polyethylene (MAPE) and four different clay loading (3, 5, 7 and 10 PE nanoclaymasterbatch pellets per hundred HDPE pellets). Four OPEFB sizes (180 µm, 250 µm, 300 µm and 355 µm) were added in the composites to investigate its effects on the fracture toughness and impact strength. Fracture toughness of the composites was determined according to ASTM D5045 and single edge notch bending (SENB) was employed during the test while impact tests were performed according to ASTM D256. The effects of alkali treatment were also investigated in this study. The result indicates that the fracture toughness slightly increased as clay loading increased. The highest value of fracture toughness was 0.47 and 1.06 MPa.m1/2 at 5 phr for both types of composites. The presence of OPEFB fiber as a secondary filler in the matrix indicates significant enhancement of fracture toughness up to 133%. However, its impact strength seems to deteriorate with the presence of OPEFB fiber.

ISSN 1511-3701

e-ISSN 2231-8542

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