STUDI ESTERIFIKASI DAN MODIFIKASI ROSIN DARI GETAH PINUS MERKUSII

• Main Author: Yaswari, Yestria
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/42856
• Institution: Institut Teknologi Bandung

Gondorukem is a natural resin derived from merkus pine that grows in many areas of Indonesia's forests. This product is produced from the separation process from terpentine as liquid products. Some of these rosin-derived products are widely needed in industries, including printing ink, paint, gum, some pharmaceutical products, etc. There are various ways of modifying the derivatives, such as disproportionation, polimeration / dimerization, mixing phenolic resins, hydrogenated, and modification of maleic anhydride by Diels Alder. The synthesis of this gondorukem needs to consider some of the effectiveness (which covers aspects of cost, energy, availability of raw materials, ease of process, etc.) as well as adjusting industry needs. In general, the quality of gondorukem and its derivatives is expressed in acidic colors and numbers. The compounds contained in rosin consist mainly of abetic acid and pimaric acid. Gondorukem derivative products are expected to be more resistant to oxidation, one of them by esterification of the acid compound into ester form. This study aims to obtain rosin-derived products through esterification with glycerol. The variables in the synthesis are the reaction time and the composition of the rosin / glycerol ratio. The characterization of the product used to determine the quality of the synthesis results is carried out with the main interpretation being the acid number and color clarity; and FT-IR to find out the functional groups of raw material compounds and esterification products. The successful esterification reaction was proven by the characterization of the functional groups using FT-IR instruments in the product samples under operating conditions for 5 hours, 250 oC, and rosin / glycerol stoichiometry ratio = 3: 1, based on the change in absorption functional groups of acid carboxylates to form esters. The rosin / glycerol = 3: 1 stoichiometry comparison is good enough for the rosin esterification synthesis reaction, but in this study the synthesis product has not reached the product quality according to SNI (with numbers still above 10).