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All Journal Chemistry Indonesian Journal of Chemical Research Serambi Engineering
Primananda, Ade
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Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering

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Potential of Shredded Ramie Fibers as Reinforcement in Recycled Polypropylene Composites: Analysis of Tensile and Bending Strength Rebia, Rina Afiani; Sabila, Faroh; Primananda, Ade
Indonesian Journal of Chemical Research Vol 12 No 3 (2025): Edition for January 2025
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2025.12-reb

Abstract

In the development of composite technology, synthetic fiber reinforcers are gradually being replaced by natural fibers. This shift is driven by growing awareness of environmental issues and the scarcity of petroleum resources, prompting researchers to explore the potential of natural fibers. This study used scraped ramie fiber (SRK) as a reinforcer, with recycled polypropylene (PP) serving as the matrix. The mixture ratios used between PP/SRK (%) were as follows: 90/10, 80/20, 70/30, 60/40, and 50/50. Before use, the scraped ramie fiber (SRK) was subjected to pretreatment with 5% NaOH to improve the mechanical bonding. The hot press technique was used to fabricate the PP/SRK composite. The physical and mechanical properties of the PP/SRK composite were analyzed through weight, thickness, volume, density, tensile strength, and bending strength measurements. The results of physical measurements obtained density values ​​for all samples between 0.73 - 0.76. The tensile test results showed a maximum stress value of 9.91 MPa and a strain value of 7.60% at the PP/SRK ratio 50/50. Then, the maximum modulus of rupture (MOR) was 23.49 MPa, and the modulus of elasticity (MOE) was 1.78 GPa at the PP/SRK ratio of 50/50.
Pengaruh Variasi Serat Rami, Limbah Rami, dan Rami Kerok sebagai Penguat Terhadap Kekuatan Tarik Papan Komposit Polipropilena Daur Ulang Primananda, Ade; Sabila, Faroh; Rebia, Rina Afiani
Jurnal Serambi Engineering Vol. 10 No. 2 (2025): April 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The purpose of this study was to evaluate the mechanical properties of composites made from recycled polypropylene reinforced with natural ramie fiber (SR), ramie waste fiber (LR), and scraped ramie fiber (RK). Recycled polypropylene was used as the binder material, while ramie fiber (SR), ramie waste fiber (LR), and scraped ramie fiber (RK) were processed by alkalization to improve the adhesion between the layers. Composite fabrication was performed by varying the ratio between matrix and reinforcer A (70/30), B (60/40), and C (50/50) using a hot press machine. Tensile test was performed according to ASTM D-638 standard. The test results showed that the composite reinforced with scraped ramie fibers (RK) produced a maximum stress of 9.26 MPa at the A3 (70/30) ratio, and the highest strain reached 7.6% at the B3 (60/40) and C3 (50/30) ratios. The more uniform structure of scraped ramie fibers (RK) was shown to contribute to a better stress distribution compared to ramie fibers (SR) and ramie waste (LR). Thus, scraped ramie fibers (RK) can be identified as the most optimal reinforcing material for recycled polypropylene composites.
Co-Authors Rebia, Rina Afiani Sabila, Faroh