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ISSN 1511-3701

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Effects of Soil Burial on Properties of Linear Density Polyethylene (LDPE)/Thermoplastic Sago Starch (TPSS) Blends

Hanafi Ismail, Rohani Abdul Majid and Razaina Mat Taib

Pertanika Journal of Tropical Agricultural Science, Volume 19, Issue 1, January 2011

Keywords: Soil burial, mechanical properties, biodegradation, TPSS

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Linear density polyethylene (LDPE)/thermoplastic sago starch (TPSS), blended with and without the addition of compatibilizer [Polyethylene-grafted-Maleic Anhydride, (PE-g-MA)] were prepared for soil burial test. The test was conducted in the natural soil environment for 3 and 6 months. Different loading of TPSS (10, 20, 30, 40, and 50 wt. %) were used in this study. After soil burial, the blends were evaluated for their tensile properties and scanning electron microscopy (SEM) to observe the surface morphology properties after the test. For LDPE/TPSS, it was observed that the tensile strength decreased with the increase of soil burial time, as well as Young modulus and elongation at break (EB). The LDPE/TPSS/PE-g-MA also showed the same trend for the tensile properties, but with higher properties as compared to uncompatibilized blends. The tensile properties also decreased with the increase in the TPSS loading for both the LDPE/TPSS and LDPE/TPSS/PE-g-MA. Meanwhile, the scanning electron microscopy (SEM) on the blend surfaces after the soil burial test showed that degradability increased with the increase in the exposure time as well as the TPSS loading.

ISSN 1511-3701

e-ISSN 2231-8542

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