The effects of lignin on mechanical, biodegradability, morphology, and thermal properties of PP/PLA/lignin were investigated. PP/PLA/lignin film were manufactured by adding PP, PLA, lignin and compatibilizer into rheomix at 200°C, at 70 rev min −1 for 30 minthen pressed using Hydraulic Hot Press at 200°C-210°C, at 6 bar for 20 min. The functional groups of PP/ PLA/lignin were analyzed using FTIR. The surface morphology, mechanical properties and thermal stability was measured by SEM, tensile strenght and TGA respectively. TThe FTIR intensity of vibration peak of -CH 3 cm -1 from PP/lignin and PP/PLA/lignin at 997-993, 1458-1451 and 2966-2904 cm -1 was lower than neat PP. The addition of lignin into PP/lignin, PLA/ lignin and PP/PLA/lignin can reduce tensile strength and elongation at break. The thermal stability PP/PLA/lignin was lower than the PP/lignin but higher compared to PP/PLA biocomposites. The biodegradability of PP/PLA/lignin biocomposites was two times higher than that of PP/lignin.
Pada penelitian ini, sintesis asam oleat terepoksidasi dilakukan dengan tujuan mempelajari pengaruh konsentrasi asam asetat dan hidrogen peroksida pada proses epoksidasi asam oleat tanpa menggunakan katalis. Reaksi epoksidasi asam oleat dilakukan pada suhu 60 °C selama 5 jam dengan kecepatan pengadukan sekitar 525 rpm. Karakterisasi terhadap produk asam oleat terepoksidasi dilakukan dengan melakukan analisis bilangan iod, analisis bilangan oksiran, analisis Fourier Transform Infrared (FTIR) dan Nuclear Magnetic Resonance (NMR). Hasil analisis bilangan oksiran menunjukkan bahwa semakin banyak mol asam asetat dan mol hidrogen peroksida yang ditambahkan akan cenderung meningkatkan nilai oksiran asam oleat terepoksidasi. Kondisi optimum sintesis asam oleat terepoksidasi tanpa menggunakan katalis diperoleh pada saat perbandingan mol antara asam oleat : asam asetat : hidrogen peroksida sebesar 1:4:9 dengan nilai bilangan oksiran sebesar 1,95 dengan konversi bilangan oksiran 62,30 % dan bilangan iod 17,23 g I2/g sampel. Hasil analisis FTIR menunjukkan terbentuknya gugus epoksida pada bilangan gelombang 837 cm-1. Hasil analisis NMR juga menunjukkan adanya pergeseran kimia baru pada 2,32 ppm sampai 2,35 ppm (H-NMR) dan 72,72 ppm (C-NMR) yang berkaitan dengan proton dan karbon yang terikat pada gugus oksiran.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.