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All Journal Saintia Kimia JOURNAL OF CHEMICAL NATURAL RESOURCES (JCNaR)
Darwin Yunus Nasution
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology

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PENENTUAN BERAT MOLEKUL DAN DERAJAT POLIMERISASI α – SELULOSA YANG BERASAL DARI ALANG-ALANG (Imperata cylindrica) DENGAN METODE VISKOSITAS Rudnin Habibah; Darwin Yunus Nasution; Yugia Muis
Saintia Kimia Vol 1, No 2 (2013): SAINTIA KIMIA
Publisher : USU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (595.681 KB)

Abstract

Research of the determination of molecular weight and degree of polymerization α-cellulose from seagegrass (Imperata cylindrica) by viscosity method had been done. To obtain the      α-cellulose, it was done using delignification process. Furthermore, the α-cellulose was characterized by infra red spectrum (FTIR) testing by compared with the infra red spectrum of α-cellulose standard. The α-cellulose viscosity was measured by using Ostwald viscometer and measurement of molecular weight and degree of polymerization based on Mark-Kuhn-Houwink equation. The results showed that the molecular weight and degree of polymerization of the α-cellulose from seagegrass (Imperata cylindrica) were 8.242,7g/mol and 45,8, respectively with the percentage of seagegrass α-cellulose was 45%. Keywords: seagegrass (Imperata cylindrica), viscosity intrinsic, molecular weight, degree of polymerization
Fabrication of Biodegraded Composite from Polypropylene, Polypropylene Grafted Maleic Anhydride, and Chempedak Seed (Artocarpus integer) Starch Nasution, Darwin Yunus; Jumirah; Siregar, Amir Hamzah
Journal of Chemical Natural Resources Vol. 3 No. 2 (2021): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (513.374 KB) | DOI: 10.32734/jcnar.v3i2.9344

Abstract

Fabrication of biodegraded composite from polypropylene, polypropylene grafted maleic anhydride, and chempedak seed (Artocarpus integer) starch has been conducted. The stages were prepared starch of Cempedak seed, grafting process of maleic anhydride on polypropylene, and fabrication of composite with a composition ratio of PP: PP-g-MA: starch of chempedak seed (9.5:0.5:0.1)g, (9.5:0.5:0.2)g, (9.5:0.5:0.3)g, (9.5:0.5:0.4)g, (9.5:0.5:0.5) g, and PP: starch of chempedak seed (10:2)g. The composites obtained were characterized using tensile strength and elongation testing, surface morphology analysis by SEM, analysis in nature with the ability to decompose by biodegradable test, and functional groups analysis by FTIR spectroscopy. The results showed that the biodegradable composites have the best properties in the ratio of PP: PP-g-MA: starch of chempedak seed (9.5:0.5:0.1)g with the test results of tensile strength was 28.743 N/m2, and also the SEM results show that flat surface and improved homogeneity, and strong group interactions as well as having good biodegradable properties.
Characterization of Biodegradable Composites from Polypropylene, Polypropylene Grafted Maleic Anhydride, and Durian Seed Starch Nasution, Darwin Yunus; Fitri, Rizka Meilia; Siregar, Amir Hamzah
Journal of Chemical Natural Resources Vol. 4 No. 1 (2022): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (598.965 KB) | DOI: 10.32734/jcnar.v4i1.9359

Abstract

The characterization of biodegradable composite from durian seed starch that is mixed polypropylene, and polypropylene grafted maleic anhydride has been done. The stages of this preparation were, the first had prepared durian seed starch, the second had the process of grafting maleic anhydride into polypropylene and the third had made of composite with the composition of PP:PP-g-MA: DSS (7:0.5:0.2); (7:0.5:0.3); (7:0.5:0.4); (7:0.5:0.5); (7:0.5:0.6) (w/w). The biodegradable composites obtained were characterized by tensile strength, surface morphology analysis by SEM, differential thermal analysis (DTA), analysis in nature with the ability to decompose biodegradable test, and functional groups analysis by FTIR spectroscopy. The results showed that the biodegradable composites have the best properties in the ratio of PP:PP-g-MA: DSS was (7:0.5:0.5) (w/w) with the test results of tensile stress is 12.556 N/m2, and the elongation is 8.600%, the images on a few flat surfaces and improved homogeneity, temperature change, and strong group interactions as well as having good biodegradable properties.
Co-Authors Amir Hamzah Siregar, Amir Hamzah Fitri, Rizka Meilia Jumirah Rudnin Habibah Yugia Muis