#TITLE_ALTERNATIVE#

• Main Author: JAYA RATRI (NIM 20507018), PARAMITA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/11121
• Institution: Institut Teknologi Bandung

Nowadays, enzymatic polymerization is one of the polymerization methods which mostly studied because it offers environmental friendly process and a new area in polymer syntheses. The objectives of this research are to study the kinetics of polyamide formation (polyamideamine from diethylenetriamine and dimethyladipate and nylon 4,6 from 1,4-diaminobutane and dimethyladipate) and the role of novozymes435, the effect of internal diffusion in the system, the effect of toluene addition as solvent to polyamideamine formation, and to determine the molecular weight of the polymer. The rate of nylon 4,6 and polyamideamine polymerization at 40 and 60 oC were determined using gas chromatography (GC). In order to support the result of the GC data, the formation of amide bonds in polyamideamine system was detected using Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR). The molecular weight of polyamides (nylon 4,6 and polyamideamine) was determined by comparing the integration of methoxy end group to the main chain methylene in 1H-NMR spectra. Toluene was added as solvent to know its effect to the molecular weight of polyamideamine. It was found that temperature and enzyme influence formation rate and molecular weight of the polymer. On the other hand, no internal diffusion effect in the beads has been observed either in polyamideamine or in nylon 4,6 formation. The degree of polymerization depends on the amine substrate, temperature, the presences of solvent, and the addition of novozyme435. On non solvent system, the molecular weight of polyamideamine is higher at 60 oC while nylon 4,6 is higher at 40 oC, due to the physical and chemical properties of the amine compound. At different temperatures in non-catalyzed system, polyamideamine and nylon 4,6 produce the same molecular weight. The presences of toluene both in catalyzed and noncatalyzed system produce polyamideamines with high degree of polymerization. The yield of catalyzed system is four times higher than the non-catalyzed one. <br /> <br />