Study of mechanical characterization on sago starch

Takiudin, Muhammad Farhan Hakim (2022) Study of mechanical characterization on sago starch. Project Report. Melaka, Malaysia, Universiti Teknikal Malaysia Melaka. (Submitted)

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Abstract

In composites, it is usual to employ petroleum-based polymers to make plastic products, which is bad for the environment because of the non-biodegradable waste effect. To ensure that sago starch is acceptable for use as a matrix, a sago starch fabrication must be conducted to evaluate the mechanical properties of various combinations of plasticizer. The characteristics of sago starch as a biodegradable composite matrix will be described using a variety of experimental approaches. The primary goal of this study is to look at the mechanical properties of sago starch. In this thesis, the physical characterization of sago starch are being studied to determined the suitable matrix paramaters in different percentage of plasticizers. The sample is fabricate by mixing the sago starch with glycerol with 20 wt.% to 40 wt%. The mixing is done manually by using hand and blend using high speed mixer to get a proper mix.Then, the mixture will be transfer into the 160mm × 60mm size of mould and being fabricate by hot press with temperature from 160°C to 180°C for 8 to 25 minutes with the pressure of 25 kg/cm2. After the sample is fabricate, it will be undergo on mechanical testing procedures for its characterization which is tensile and flexural testing. Tensile testing is done by following the ASTM D-638 and flexural testing is following ASTM D790. Scanning Electrode Microscope (SEM) also been conducted for morphological characteristics. The highest tensile strength achieved shown in tensile testing is when content of sago starch is at 75 wt.%, whereas flexural strength is achieved at the highest when content of sago starch is at 75 wt.%. In conclusion, the addition of glycerol substantially increased the tensile strenght and flexural strenght of the composites matrix.

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