PENGARUH PENAMBAHAN KATALIS TERHADAP SIFAT MEKANIS RESIN POLIESTER TAK JENUH

Hendri Hestiawan , Jamasri, Kusmono(1),
(1) Departemen Teknik Mesin dan Industri, Fakultas Teknik, Universitas Gadjah Mada, Indonesia

Abstract


The aim of this research is to investigate the effect of catalist addition on the mechanical properties of polyester resin. The research materials are unsaturated polyester resin Yukalac 157 BQTN-EX7 and catalist methyl ethyl ketone peroxide (MEKP). The specimen based on ASTM D638 standard for tensile test and ASTM D790M standard for flexure test. Research specimens varied in catalist cocentration are from 0.5 to 3% with changed every 0.5%. Manufacture of specimens use acrylic material with hand lay-up method. The tensile test showed that the addition of catallist cocentration resulted decrease in tensile and flexure strength after 1% catalist cocentration. The highest tensile and flexural strength was found for the catalist cocentration of 1%, i.e. 62 MPa and 132 MPa respectively. Macrostructure observation of the fracture surface of tensile test showed relatively flat and shiny indicating that polyester resin composites are brittle.

Keywords


unsaturated polyester resin; catalist cocentration; hand lay-up; mechanical properties

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