Study the physical, mechanical, thermal and morphological properties of LDPE/SAGO starch blend
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...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Published: |
2015
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/7325/ http://eprints.uthm.edu.my/7325/1/1178.pdf |
| Summary: | 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. |
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