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Study the physical, mechanical, thermal and morphological properties of LDPE/SAGO starch blend

Kormin, Shaharuddin and Kormin, Faridah and Hossen Beg, Mohammad Dalour and Mat Piah, Mohd Bijarimi (2015) Study the physical, mechanical, thermal and morphological properties of LDPE/SAGO starch blend. In: International Engineering Research and Innovation Symposium 2015 (IRIS), 12–13 September 2015, Putrajaya, Malaysia.

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Abstract

A variety of low density polyethylene (LDPE)/sago starch compounds and degradable sago based moulds with various sago starch contents to enhance their mechanical properties were prepared by twin screw extrusion with the addition of additives. Biodegradable and compostable plastics based on renewable resources from the agricultural industry are an essential innovation which offers significant impulses for the future technologies. In this study, sago starch was physically blended with LDPE and few additives to produces plasticized starch biodegradable polymer. LDPE with different percentage sago starch loading were shaping processed by conventional extrusion, injection moulding. Studies on their characteristics, mechanical properties were carried out using SEM and universal mechanical tester machine respectively. The addition of starch to LDPE reduced the MFI values, the tensile strength and the elongation at break, whereas the modulus increased. However, the density increases with the addition of sago starch. The presence of high starch contents had an adverse effect on the impact and flexural properties of LDPE/sago starch blends. Water adsorption was increase with increasing of sago starch loading. Scanning electron microscopy (SEM) shows agglomeration of the starch granules and hence, poor wetting between the starch granules and LDPE matrix. For thermal stability, it was found that the LDPE with 30wt% sago starch loading had the highest thermal stability.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: low density polyethylene; sago strach; biodegradable mould
Subjects: T Technology > TP Chemical technology > TP1080-1185 Polymers and polymer manufacture
Divisions: Faculty of Applied Science and Technology > Department of Technolgy and Heritage
Depositing User: Normajihan Abd. Rahman
Date Deposited: 07 Oct 2015 08:45
Last Modified: 07 Oct 2015 08:45
URI: http://eprints.uthm.edu.my/id/eprint/7325
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