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All Journal Jurnal Kimia dan Kemasan Journal of Mechanical Engineering, Science, and Innovation
Jayatin Jayatin, Jayatin
Balai Pengkajian Teknologi Polimer - BPPT Gedung 460 Kawasan PUSPIPTEK, Tangerang Selatan, 15314
Chemistry Control & Systems Engineering Energy Engineering Mechanical Engineering

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Pengaruh Konsentrasi Inisiator Dan Komposisi Styrene Dan Maleic Anhydride Terhadap Berat Molekul Pada Sintesis Kopolimer Poly (Styrene-Maleic Anhydride) Afrinaldi, Bambang; Jayatin, Jayatin
Jurnal Kimia dan Kemasan Vol. 36 No. 2 Oktober 2014
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1251.802 KB)

Abstract

Pada pencampuran antara dua jenis polimer dibutuhkan kompatibilitas yang cukup baik supaya diperoleh hasil yang bagus. Fungsi polimer adalah salah satu cara untuk meningkatkan kompatibilitas dengan memberikan gugus fungsi pada suatu polimer. Studi ini mempelajari pengaruh inisiator dan komposisi monomer styrene dan maleic anhydride terhadap berat molekul pada sintesis Poly (Styrene-Maleic Anhydride) (PSMA). Polimerisasi dilakukan pada temperatur 90°C dengan inisiator benzoil peroksida (BPO). Pada analisis Fourier Transform Infra Red (FTIR) terlihat adanya puncak pada bilangan gelombang 1844,4 cm-1 dan 1778,2 cm-1 yang merupakan ikatan C=O pada struktur siklik anhidrat. Berat molekul tertinggi dari PSMA yang dihasilkan adalah sebesar 26208 g/mol yaitu pada penggunaan inisiator sebanyak 0,21 mmol. Bilangan asam PSMA relatif stabil dan mulai mengalami penurunan pada perbandingan styrene : maleic anhydride = 2 : 1. Analisis Differential Scanning Calorimeter (DSC) menunjukkan bahwa PSMA memiliki nilai Tg sekitar 135°C. 
Effects of UV Exposure on the Physical, Chemical, and Mechanical Properties of Silica Microballoon Reinforced Epoxy Composites Yunus, Muhammad; Ardhyananta, Hosta; Hidayat, Mas Irfan Purbawanto; Rosidah, Afira Ainur; Laksmono, Joddy Arya; Jayatin, Jayatin; Susanti, Diah; Wijaya, Ade Mundari
Journal of Mechanical Engineering, Science, and Innovation Vol 4, No 1 (2024): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2024.v4i1.6159

Abstract

Epoxy-based composites are widely used in various applications due to their excellent mechanical properties and durability, but their performance under prolonged UV exposure remains a critical concern. This study examines the impact of UV exposure on the physical, chemical, and mechanical properties of epoxy-silica microballoon composites over curing periods of 0, 200, and 400 hours. Results indicate that UV treatment increased the density from 1.0073 g/cm³ to 1.0129 g/cm³. SEM images showed a reduction in fragmentation of epoxy microballoons, indicating stronger bonding. EDX results revealed some changes in elemental composition, with a notable decrease in the percentage of sodium from 0.81 wt.% to 0.18 wt.% and silicon from 7.16 wt.% to 0.12 wt.%. FTIR analysis identified a new hydrogen bond formations at 3350 cm⁻¹. Mechanical testing showed that UV treatment significantly increased the flexural stress from 36.83 MPa to 49.98 MPa. Additionally, hardness (Shore D) increased from 78.4 to 80.2 Shore D. These findings highlighted the significant effects of UV exposure on the structural integrity and bonding mechanisms of the composites, offering valuable insights for their use in UV-prone environments.
Co-Authors Afira Ainur Rosidah Bambang Afrinaldi, Bambang Diah Susanti Hidayat, Mas Irfan Purbawanto Hosta Ardhyananta Joddy Arya Laksmono Muhammad Yunus Wijaya, Ade Mundari