Studi Experimen Komposit High Density Polyethelene (HDPE) Limbah Berpenguat Serat Cantula (Agave Roxb) Terhadap Sifat Thermal

Abstrak

Research on experimental studies of High Density Polyethylene (HDPE) composite waste with cantula fiber reinforcement (Agave Roxb) on thermal properties aims to determine the effect of exposure on changes in the thermal properties of composites. The composite specimens were exposed in an open location and then tested for thermal properties using Thermogravimetric analysis (TGA) and Fourier Transformer Infra Red (FTIR).Composite using waste material High Density Polyethylene (HDPE) with mesh 40-60, reinforcement using 10 mm long Agave Roxb fiber. Mixing the ingredients using a mixer at 200 rpm for 10 minutes, during the mixing process is added 0.5 wt% isopropyl liquid. Composites were made by pressing the press on a hot press at a pressure of 30 bar, temperature of 1200 C for 15 minutes. Composites were cut into specimens and then exposed for 90 days with an exposure angle of 600, exposure using the ASTM D 1345 standard. The results of thermal testing with FTIR obtained a spectral graph that exposure causes loss of the Nitrile (R – C≡N) functional group in the composite, causing the polymer bond chain to be broken and resulting in a decrease in the strength of the composite. The results of sample testing using TGA on samples without exposure resulted in good geometrical thermal stability properties because until the temperature of 400oC the mass of the sample decreased there was still 90% when compared to the exposure treatment, the sample mass decreased and 81% remained. DTA testing of samples with exposure to the glass transformation phase had a lower heat absorption, while the liquid phase and the composite decomposition phase with exposure had higher heat absorption.