Sallehuddin, Nurul Jannah (2018) Effects Of Annealing Treatment On Thermal And Mechanical Properties Of Poly (Lactic Acid). Project Report. Universiti Sains Malaysia, Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral. (Submitted)
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Abstract
The purpose of this study is to investigate the thermal and mechanical properties of annealed PLA. PLA pellets has been dried in an oven at 80℃ for at least 4 hours. The dried PLA were then moulded into impact and tensile test pieces using injection moulding machine. Then, the samples were subjected to 70℃, 80℃, 90℃, 100℃, 110℃, 120℃ in oven for 90 minutes. After the specimens were removed from the oven, the specimens were undergone two different type of cooling techniques. First cooling technique was quenching into basin which filled with ice cubes for five minutes. Second cooling technique was cooling process at room temperature in desiccator. The impact strength of annealed samples was obtained from the impact test by using impact tester. The degree of crystallinity and thermal properties of annealed samples were characterized by Differential Scanning Calorimetry (DSC). Besides, X-ray Diffraction (XRD) analysis is done to determine the crystallinity changes after subjected to annealing process. It is found that impact strength decreased with increment of annealing temperatures. Crystallinity has been improved for annealed samples and exhibit better thermal and mechanical properties of PLA.
| Item Type: | Monograph (Project Report) |
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| Subjects: | T Technology T Technology > TN Mining Engineering. Metallurgy |
| Divisions: | Kampus Kejuruteraan (Engineering Campus) > Pusat Pengajian Kejuruteraan Bahan & Sumber Mineral (School of Material & Mineral Resource Engineering) > Monograph |
| Depositing User: | Mr Engku Shahidil Engku Ab Rahman |
| Date Deposited: | 24 Jun 2022 09:41 |
| Last Modified: | 24 Jun 2022 09:41 |
| URI: | http://eprints.usm.my/id/eprint/53054 |
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