Pengaruh serbuk serat batang pisang sebagai filler terhadap sifat mekanis dari komposit PVC? CaCO3

The aim of research was to study the effect to the mechanical properties of banana fiber as a filler of PVC-calcium carbonate composite. Banana stem powder was made from banana stem which was grounded and soaked in 15 % NaOH for 24 hours to remove the lignin, dried andscreened to 200 mesh, PVC-calcium carbonate composite was made using a Two Roll Mill attemperature of 50oC, for 10 minutes and 50 rpm. The composition of PVC and additives were no varied, while the variations made on banana fiber, ie 0, 10; 20, 30, and 40 phr (per hundred resin). The observation showed the mechanical properties of PVC- calcium carbonate composite has value of weight per unit area between 4.55 to 5.90 kg/m2, bulk densities from 1.503 to 1.999 g/cm3, tensile strength from 67.56 to 79.03 kg/cm2, hardness 55.00 to 66.66 shore D, water absorption from 0.960 to 3.322 %, flexibility test from 118.99 to 165.09 kg/cm2, flash point 0.032 0.075 inc / sec, water density was good (not drop happened) and the ability of sawed and nailed was good (no defected/cracked). When the test results of PVC-calcium carbonate composite with banana fiber compared with SNI 15-0233-1989 Mutu dan Cara Uji Lembaran Serat Semen, indicates that all PVC-calcium carbonate composite with banana fiber as filler fulfilled SNI requirements.