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All Journal Prosiding Pendidikan Sains Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) JURNAL PENELITIAN SAINTIKA Elkawnie JURNAL PENGABDIAN KEPADA MASYARAKAT Jurnal Pendidikan Kimia Universitas Riau Lantanida Journal Jurnal Pendidikan Kimia (JPKim) Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Indonesian Journal of Chemical Science and Technology Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun Journal of The Indonesian Society of Integrated Chemistry
Ahmad Nasir Pulungan
Universitas Negeri Medan
Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Social Sciences Other

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PENGARUH PERBEDAAN METODE MELT PROCESSING DAN SISTEM LARUT TERHADAP HASIL GRAFT KOPOLIMERISASI CYCLIC NATURAL RUBBER (CNR) DENGAN GLYCIDYL METHACRYLATE (GMA) Eddiyanto, Eddiyanto; Sipahutar, Rezwan Mulya; Nurfajriani, Nurfajriani; Pulungan, Ahmad Nasir; Herlinawtati, Herlinawati
Lantanida Journal Vol 12 No 2 (2024)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v12i2.26272

Abstract

Although natural rubber has many good qualities, its commercial uses are limited by its low chemical reactivity and low heat stability. A derivative with better stability, Cyclic Natural Rubber (CNR), has to be chemically modified to increase its usefulness and broaden its range of applications. Investigating the effects of two different methods, the melt processing and solution system on the FTIR spectra of Cyclic Natural Rubber (CNR) graft copolymerization with Glycidyl Methacrylate (GMA) was the aim of this work. Additionally, an evaluation of the effect of Dicumyl Peroxide (DCP) and Benzoyl Peroxide (BPO) initiators on grafting results was carried out. According to FTIR spectrum analysis, the carbonyl ester (C=O) peak at roughly 1721 cm⁻¹, indicating effective grafting, was more pronounced in the melt processing approach than in the solution procedure. This implied that melt processing resulted in higher grafting efficiency. The absorption bands in the C-H stretching region (2860-2921 cm⁻¹) and the C=C stretching area (1672 cm⁻¹) show that the underlying structure of CNR has not degraded. The carbonyl index values for each composition showed that BPO performed better than DCP in the melt treatment method, however DCP as an initiator in the solution system produced a higher grafting efficiency than BPO.
Analysis and Characterization of Interactions Between Components in Claymask Formulations Khairatun Annisa; Ahmad Nasir Pulungan; Junifa Layla Sihombing
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68671

Abstract

The basic properties that need to be considered and maintained in the use of an ingredient in cosmetic and pharmaceutical formulations are: colloidal size, plasticity of crystal structure, mineralographic composition, high cation exchange capacity, development capacity, high specific surface area, and consequently strong adsorption and absorption capacity. Clay masks can contain active ingredients in the form of antibacterial with alternative natural ingredients such as babadotan leaf extract. The analysis of the functional cluster in the study was obtained using the Fourier Transform Infrared (FT-IR) method,Evaluation of clay mask preparations includes testing of physical and chemical properties. Testing of physicochemical properties consists of organoleptics, pH, homogeneity, dispersibility, adhesion and antibacterial test against bacteria p. Acnes. The stability of the preparation will be damaged if the mixing system is disturbed, mainly due to temperature changes and changes in composition due to excessive addition of one of the phases or if the emulsifying substances are not mixed with each other. The extraction results obtained from babadotan the yield produced is 17.63%. The FTIR spectrum obtained for the clay mask formulation shows the presence of new peaks at wave numbers 3310, 2120, 1430 and 2126 cm-1 where these peaks appear due to the additional ingredients used in the cosmetic formulation.The interaction between the components of the clay mask depends on the type of clay being applied. Interactions can be seen in FTIR with additional spectral peaks caused by other additives such as glycerin, In which the interaction shows the OH group involved in water absorption. This is because the results of all evaluations, Formula I tends to be stable close to the requirements of the clay mask preparation.
Co-Authors ., Asmidi ., Nurrnalis Adittiya Prayoga Agung Abadi Kiswandono Agus Haryono Agus Kembaren Ajat Sudrajat Ajeng Asri Audi Akhir Mauludin Pulungan Ambarwati Ambarwati Andriayani Ani Sutiani Ary Anggara Wibowo Ary Anggara Wibowo Aryani, Widya Audi, Ajeng Asri Clara Nur Wandani Dewi Syafriani Dimas Ridho Dwi Siswanta Eddiyanto Eddiyanto Fahmi, Jaman Girsang, Ermi Hafni Indriati Nasution Haqqi Annazili Nasution Harmileni Hasibuan, Muhammad Irvan Herlinawati Herlinawati Herlinawtati, Herlinawati Ida Duma Riris Intan Ayu Safitri Irma Syahputri Jamalum Purba Janter Pangaduan Simanjuntak Jasmidi ., Jasmidi Jasmidi Jasmidi Junifa Layla Sihombing Junifa Layla Sihombing Junifa Layla Sihombing Junifa Layla Sihombing Junifa Layla Sihombing Junifa Layla Sihombing, Junifa Layla Juniva Laila Sihombing, Juniva Laila Khairatun Annisa Kurniawan, Ekin Dwi Arif Lastri Anita Silitonga Lisna Efiyanti Lisna Efiyanti malis, Nur Manalu, Elisabet Manurung, MS Mhd Fahmi midi, Jas Moondra Zubir MS Manurung Muhammad Hadi Muhammad Hadi Muhammad Irvan Hasibuan Mutiara Agustina Nst Nia Veronika Nurfajriani Nurfajriani Nurfajriani, Nurfajriani Nurul Hidayah Nurul Hidayat Aprilita Pernando Sitepu Poppy Lindawati Puji Prayugo Putri Ayunicha Putri Faradilla Rahayu Rahayu Rahayu Rahayu Rahayu Rahayu Rahmani, Mei Ramadhan, Dwi Sapri Ratna Sari Dewi Rudi Munzirwan Siregar, Rudi Munzirwan Safitri, Wulan Dwi Saharman Gea Saragih, Gimelliya Sari, Dwy Puspita Shallomita, Grace Sianturi, Irianani Ainung Simanjuntak, Evalina Br Simanjuntak, Janter Pangaduan Simatupang, Patricia Sipahutar, Rezwan Mulya Sirait, Martina Siregar, Nuraini Sitinjak, Nurhalimah Sri Juari Santosa Sutiani, Ani Syahputra, Ricky Andi Syuhada, Feri Andi Takashi Hayashita Tambunan, Kristine Tiamina Nasution Tiamina Nasution Tita Juwitaningsih Trisunaryantr, Wega Triyono . Wardana, Dian Yasir Arafat Hutapea Yuli Asih Wiliranti Yusnidar, Erika Zuhairiah Nasution, Zuhairiah