Analisa Variasi Suhu Tekan Panas Terhadap Sifat Fisis Dan Sifat Mekanik Pada Campuran Plastik HDPE Dengan Serbuk Kayu

Fernandes, Randi (2022) Analisa Variasi Suhu Tekan Panas Terhadap Sifat Fisis Dan Sifat Mekanik Pada Campuran Plastik HDPE Dengan Serbuk Kayu. Other thesis, Universitas Islam Riau.

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Abstract

Composite particleboard is a composite made of natural fibers bonded with synthetic materials. The manufacture of particleboard using hot press machine technology with a mixture of wood powder and shredded plastic is usually used as a composite board product. This study aims to determine the variation of the compressive temperature on the physical and mechanical properties of a mixture of HDPE plastic with sawdust. In this study, the composition of 20% sawdust and 80% HDPE plastic with variations in hot pressing temperatures were 140 oC, 150 oC and 160oC within 2 hours. The results of the analysis of microstructure testing at a temperature variation of 140oC showed more pores (porosity), while at a temperature variation of 150oC HDPE particles were evenly distributed and at a temperature of 160oC there was little porosity. This is because the temperature and 150oC and 160oC can soften the HDPE particles causing the bonding between the sawdust surfaces to be better, also able to significantly reduce the existing pores. The highest bending test results at a temperature of 150oC that is equal to 25.92 MPa, while the lowest flexural strength is at a temperature of 140oC that is equal to 15.72 MPa. This is because the mechanism of increasing strength and decreasing strength is related to the number of pores and bonds between particles. The results of the composite material impact strength test. At a temperature of 140oC the value of the impact strength is 125 J/mm2 at a temperature of 150oC there is an increase in the value of the impact strength that is equal to 134 J/mm2 and a decrease in the impact strength at a temperature of 160oC which is 128 J/mm2. The increase in the impact strength value is due to the good bonding between particles in the composite and the small number of pores as an initial crack.

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