Synthesis and Characterization of Liquid Natural Rubber (LNR) from SIR-10 as a Basic Material for Making Rubber Compounds
DOI:
https://doi.org/10.24114/ijcst.v9i1.72436Keywords:
liquid natural rubber, SIR-10, deproteinization, oxidative degradation, FTIRAbstract
Liquid Natural Rubber (LNR) is synthesized from Standard Indonesian Rubber (SIR-10) through the process of deproteinization and oxidative degradation using phenylhydrazine/O₂. Deproteinization was carried out by the Soxhlet extraction method using acetone solvents to reduce protein content that can inhibit the degradation process. Furthermore, the rubber was oxidatively degraded and characterized using Fourier Transform Infrared (FTIR) and intrinsic viscosity measurements with an Ostwald viscometer. The FTIR results showed the emergence of new absorption bands at 3273 cm⁻¹ (O–H) and 1713 cm⁻¹ (C=O) indicating the formation of oxidized functional groups. Viscosity analysis showed a significant decrease in molecular weight from 3.717 × 10⁵ g/mol (SIR-10) to 2.375 × 10³ g/mol (LNR). These results confirmed that SIR-10 was successfully converted into LNR which has the potential to be used as a base material in the manufacture of rubber compounds.References
1. Santi P., Mochamad, C., Asron, F. F., & Adi, C. (2023). Karet Alam Hidrogenasi Sebagai Matriks Polimer Alternatif Pada Komposit Elastomer Bantalan Jembatan. J Penelit Karet. 41, 139–52.
2. Hani, H., Muhammad, I. F., & Indria, K. (2011). Karakteristik Sifat Fisik Dan Ketahanan Terhadap Minyak Dari Karet Alam Epoksi. J Penelit Karet. 29, 49–62.
3. Brosse, J. C., Campistron, I., Derouet, D., Hamdaoui, A. E., Houdayer, S., Reyx, D., & Gillier, S.G. (2000). Chemical Modifications of Polydiene Elastomers: A Survey and Some Recent Results. J 0f Appl Polym Sci. 78, 1461–77.
4. Feerzet, A., Deviany, Ayunda, N., Rindi, A., Suhartono, & Suharto. (2023). Fisibilitas Pemanfaatan Koagulan Alami Terhadap Karakteristik Karet Pada Produksi SIR 20. J Penelit Karet. 12, 153–68.
5. Seiichi, K., Warunee, K., Hirofumi, K., & Yoshinobu, I. (2004). Removal Of Proteins from Natural Rubber with Urea. Polym Adv Technol. 15, 181–4.
6. Hani, H., Dadi, R. M., & Cynthia, L. R. (2016). Peningkatan Ketahanan Oksidasi Karet Alam Melalui Pengikatan Antioksidan 4-Aminodifenilamina Secara Kimia. Maj Kulit, Karet, dan Plast. 32, 65 - 74.
7. Tamrin, Leny, S., & Eddiyanto. (2021). Preparation and Characterization of Liquid Natural Rubber Through Oxidative Degradation with Phenyl Hydrazine and Benzoyl Peroxide-Oxygen. IOP Conf Ser Earth Environ Sci. 912, 1 - 10.
8. Naharullah, J., Muhammad, J. M. Y., Ibrahim, A., Siti, F. M. Y. (2016). Synthesis, Characterization, and Properties of Hydrogenated Liquid Natural Rubber. Rubber Chem Technol. 89, 227–239.
9. Hussin, M. N., & John, R. E. (1998). Telechelic Liquid Natural Rubber: A Review. Prog Polym Sci. 23, 143–77.
10. Sofiani, I. H., Ulfiah, K., & Fitriyanie, L. (2018). Budidaya Tanaman Karet (Hevea brasiliensis) di Indonesia dan Kajian Ekonominya. J Agroteknologi. 2, 1–23.
11. Li, H. H., Xiaoxiang, Y., & Jianhong, G. (2018). Study on Microstructure Effect of Carbon Black Particles In Filled Rubber Composites. Int J Polym Sci.
12. Masaki, T., Keisuke, S., & Hiroshi, I. (2023). Stretching Vibrational Frequencies and Pka Differences In H-Bond Networks of Protein Environments. Biophys J [Internet]. 122, 1-24.
13. Tatsuro, N., Teppei, S., & Hideki, K. (2024). Low-Temperature FTIR Spectroscopy of the L/Q Switch of Proteorhodopsin. Phys Chem Chem Phys. 26, 1-24.
14. Victor, A. L. F. (2020). Infrared Difference Spectroscopy of Proteins: From Bands to Bonds. Chem Rev. 120, 1-111.
15. Tamrin, Leny, S., & Eddiyanto. (2021). Preparation and Characterization of Liquid Natural Rubber Through Oxidative Degradation with Phenyl Hydrazine and Benzoyl Peroxide-Oxygen. IOP Conf Ser Earth Environ Sci. 912, 1 - 10.
16. Nurhendrawan. (2015). Preparasi dan Karakterisasi Liquid Natural Rubber (LNR) sebagai Kompatibiliser untuk Meningkatkan Sifat Mekanik dan Sifat Termal Kompon Karet Alam.. 16, Universitas Sumatera Utara.
