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All Journal Logic : Jurnal Rancang Bangun dan Teknologi PELS (Procedia of Engineering and Life Science)
Yuli Suwarno
Politeknik ATK Yogyakarta
Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering

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Effect of UV Aging on Physical Properties of Vulcanized Rubber with the Addition of Reclaimed Rubber Muh. Wahyu Syabani; Yuli Suwarno; Mertza Fitra Agustian
Logic : Jurnal Rancang Bangun dan Teknologi Vol 19 No 3 (2019): November
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (693.895 KB) | DOI: 10.31940/logic.v19i3.1469

Abstract

Rubber solid waste amount increased continuosly and caused environmental problem since it is very difficult to be naturally degraded. Therefore, the interest of using rubber waste as raw material for new rubber product is increased. Reclaimed rubber can be used as filler aditif for rubber processing. The aim of this research was to study the effect of UV aging on the rubber product as the reclaimed filler added. The mixing of the rubber and the additives used the kneader and open mill. The vulcanization process was done by hydraulic press. In this research, the reclaimed rubber addition was varied as follows: 12,5; 37,5 and 62,5 phr. The products quality differences before and after the UV aging evaluated using physical tests. The result of FTIR showed that the polymer chain were broken by ultraviolet radiation. The physical test gives result that the hardness and tensile strength decreased, but the elongation is increased after UV aging.
Analysis of the Use of Filter Screen Rubber Compound Straining process with Multivariate Regression Yuli Suwarno
Procedia of Engineering and Life Science Vol 4 (2023): Proceedings of the 6th Seminar Nasional Sains 2023
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v4i0.1389

Abstract

The rubber compound is processed with a strainer machine to filter out contaminants as a material for making rubber products. The process of filtering the rubber compound with an extrusion-based strainer machine is done with heat to soften and flow the material through the filter screen. This condition will increase the risk of the rubber compound dying (scorching) in the subsequent processing of the rubber compound. The multivariate linear regression model is a regression model with more than one correlated response variable and one or more predictor variables. The purpose of this study was to study the relationship between the use of the same filter screen for the straining process with a certain batch number of straining processes against temperature and time rubber compound scorching. The results showed that the use of filter scree in the straining process and its effect on the characteristics of the rubber compound can be modeled in a multivariate linear regression model following this model [Y ̂_(1) ) Y ̂_((2) ) ]= [78,590+ 3.125X 15.759-1.003X]. The eta square lambda value (η_Δ^2) of 0.925 indicates that the regression model can explain 92.5% of data Based on the multivariate linear regression model, it is possible to calculate the proper replacement period of the filter screen in the rubber compound straining process which increases the efficiency of the rubber compound processing and minimizes the possibility of the rubber compound dying in the process (scorching).
Co-Authors Chasbiyatur Rozalia Mertza Fitra Agustian Muh. Wahyu Syabani Raden Bagus Seno Wulung