Synthesis of Starch-g-poly(cinnamic acid) as a Potential Material for Enhanced Oil Recovery Application

• Main Author: RAHMAWATI (NIM : 10513065), MIDRATHUL
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/28913
• Institution: Institut Teknologi Bandung

<p align="justify">Starch is used as a backbone molecule in the formation of graft copolymers with other polymers to be applied in Enhanced Oil Recovery (EOR). The advantages of using starch in polymerization reactions are due to its properties such as easily available natural polymers, inexpensive, and environmental-friendly. Starch-based copolymers are able to increase the viscosity of the water to increase the amount of oil into the reservoir. This research aims to study the variables that affect the polymerization reaction of cinnamic acid grafted with cassava starch to produce copolymers of starch-g-poly(cinnamic acid). The cinnamic acid polymerisation is carried out via radical polymerization using the cerium ammonium nitrate (CAN) as an initiator. The result of FTIR analysis on the resulting polymer shows the absorption peak of OH group which is sourced from starch at wavelength about 3500 cm-1 and the loss of C = C absorption peak alkena group at wave number 1610-1680 cm-1 because the cyclic acid double bond in cinnamic acid is substituted and forming a poly(cinnamic acid). The results of polymer analysis with NMR showed peaks in 4-5 ppm regions (RCH=CHR), 5.5-6.5 ppm (H aromatic) and 9.2-10 ppm regions showed peak shift (RCO2H). The viscosity test on the polymer carried out in room temperature to 75 oC indicates that the temperature rise results in a decrease in viscosity. The maximum viscosity obtained for the copolymer was 1.55 cP at room temperature (25 oC) for the use of 1% cerium ammonium nitrate (CAN) initiator and polymerization degree (DPn) 68. The polymer viscosity test is performed by adding NaOH solids 16% into the polymer solution to increase the solubility of the polymer. The polymer salinity test was performed by adding NaCl 10%. The highest polymer viscosity was obtaned 1.65 cP for room temperature.<p align="justify">