Pengembangan dan Penentuan Sifat Mekanik Komposit Poliester yang Diperkuat dengan Serat Bundung

Abstract

Abstrak

The aim of this study is to investigate the flexural, tensile and impact strength of polyester matrics composite reinforced with weed (Scirpus Grossus) fiber. In this study the composite materials have been made where using was Yukalac C-108 B type polyester resin and the fiber using was weed which was treated 4 hours immersion using 5% NaOH, then rinsed with clean water, then dried in the sun for 1 day. The composite was made by hand lay-up method, with the composition of fiber and resin used (95%: 5%, 95%: 5% and 15%: 85%). Samples and mechanical testing procedures, following the standard size and testing ASTM D638-I for tensile testing, ASTM D-790 for flexural testing, and ASTM D256 for impact testing. The results of this study indicate a maximum tensile stress value of 16, 672 MPa with a fiber content of 10%, and a maximum tensile strain value of 0.033, with a fiber content of 10%. the yield value at the maximum flexural strength is 70.6 MPa, with a fiber content of 10% continues to decrease until the lowest flexural strength value is 32.73 MPa, with a fiber content of 15%. the maximum impact strength is 11.46 J, with a fiber content of 15%, and the lowest impact strength value is 7.0315 J, with a fiber content of 5%.