PENGARUH ZAT IMBUN ARANG AKTIF TEMPURUNG KELAPA DALAM POLIBLEND LLDPE - KARET ALAM

• Main Author: Masykuri, Mohammad
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/1409
• Institution: Institut Teknologi Bandung

In recent years, thermoplastic materials, with certain additives, are more important and widely used as the alternative materials that replaced metals and other materials. The influence of the addition of coconut-shell active carbon to the LLDPE-natural rubber (LLDPE/NR) polyblend is the focus of this study. Composition of LLDPE/NR studied was 60/40. Coconut-shell active carbon (AA) added were varied between 0-20%. Polyblend was made through masterbatch process by the two roll mill. The polyblend produced was stored in air, radiated with UV-ray, and stored then in the chamber with 25° and 40°C of temperature. An array of tests, such as, swelling test, DSC thermal analysis, X-ray diffraction (XRD) analysis, infrared spectroscopic (FTIR) analysis and tensile test were done to characterize the polyblend resulted. The results show that polyblend has the additive property, and each components, LLDPE, NR and AA, are physically interact. Crystalinity of the polyblend decreased in order to the increasing of AA. Maximum crystalinity, 86.176%, was reached by the free-AA polyblend. Until 15% of AA in the polyblend, mechanical properties got better in order to the increasing of the AA in the polyblend. Maximum yield strength, 0.722 kgf mm-2, and maximum ultimate strength, 1.249 kgfmm2, are given by LLDPE/NR/AA 15%. Mechanical properties decrease in addition of AA over 15%. This study also shows that AA can be act as UV stabilizer effectively. Polyblend without AA has 18 days of critical dose, otherwise AA addition can increase the critical dose until more than 21 days. AA addition does not have the cross-links effect to the polyblend. Radiation with UV-ray, heating, and storing in the air will decrease the mechanical properties of the polyblend. The decreasing of the mechanical properties is equal to the time exposure.