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hesty eka mayasari
Center for Research and Standardization of Surabaya
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The Effect of Filler Substitution on the Mechanical Properties and Morphology of CR/NR Composite hesty eka mayasari; agung yanuar wirapraja
Jurnal Teknologi Proses dan Inovasi Industri Vol 6, No 2 (2021): Vol. 6, No. 2, November 2021
Publisher : Balai Riset Dan Standardisasi Industri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36048/jtpii.v6i2.7380

Abstract

Filler is one of the most important additives in making rubber goods. Filler can improve the properties of rubber goods. This study aims to determine the effect of filler substitution on the chloroprene/natural rubber (CR/NR) composite. The filler used in this study are carbon black (CB) N330, combination of zeolite and CB (1:1), combination of kaolinite and CB (1:1), and combination of bentonite and CB (1:1). The composites were done by a two-roll mill and hydraulic press. The mechanical properties and the morphology of CR/NR composite were studied using tensile strength tester and scanning electron microscope. The elemental composition of the composite was studied by X-ray fluorescence. From the study, it is known that the carbon black as a single filler gives the highest tensile strength and tear strength. The zeolite as substitute filler gives the highest tensile strength and elongation. The bentonite as substitute filler gives the lowest tensile strength and tear strength. All of the composites show fine dispersion in SEM micrograph. Zeolite as substitute filler is a potential alternative filler for CR/NR composite
Effect of Montmorrilonite on the Chloroprene/Natural Rubber Blend hesty eka mayasari; agung yanuar wirapraja
Jurnal Teknologi Proses dan Inovasi Industri Vol 6, No 2 (2021): Vol. 6, No. 2, November 2021
Publisher : Balai Riset Dan Standardisasi Industri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36048/jtpii.v6i2.7381

Abstract

The effect of montmorillonite on chloroprene (CR)/ natural rubber (NR) blend was studied in this research. Montmorillonite was used as a compatibilizer with the various amounts (0, 2.5, 5, 7.5, 10 phr). The compounds were done by the two-roll mill and hydraulic press. The cure characteristics, mechanical properties, morphology, and thermal characteristics had been investigated by rheometer, tensile strength tester, scanning electron microscope (SEM), and differential scanning calorimetry (DSC). The montmorillonite resulted in longer scorch time and lower activation energy. Analysis of the blends by SEM and DSC showed that montmorillonite resulted in a compatible blend. The 2.5 phr montmorillonite gave the best curing characteristics with the lowest optimum time, the highest constant rate, and the lowest activation energy. It also gave the best tensile strength, elongation, and tear strength. The 2.5 phr montmorillonite was the proper compatibilizer for CR/NR blend
Sifat Mekanik dan Karakteristik Termal Karet Alam/EPDM untuk Bantalan Dermaga hesty eka mayasari; agung yanuar wirapraja
Jurnal Teknologi Proses dan Inovasi Industri Vol 7, No 1 (2022): Vol. 7, No. 1, Juli 2022
Publisher : Balai Riset Dan Standardisasi Industri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36048/jtpii.v7i1.7708

Abstract

Bantalan dermaga adalah salah satu bagian penting pada pelabuhan. Dalam penelitian ini digunakan karet alam (KA)/ Ethylene propylene diene monomer rubber (EPDM) sebagai bahan pembuatan bantalan dermaga. Komposit KA/EPDM dibuat menggunakan two-roll mill dengan variasi komposisi EPDM (10-50%). Sifat mekanik seperti tegangan putus, perpanjangan putus, kekerasan, ketahanan sobek, serta ketahanan pengusangan dan sifat termal dipelajari menggunakan tensile strength tester, hardness tester, oven, dan  Shimadzu DTG 60. Kandungan EPDM yang semakin tinggi dapat menurunkan tegangan putus, perpanjangan putus, dan kekuatan sobek komposit. Namun EPDM dapat meningkatkan ketahanan termal komposit KA/EPDM. Pengusangan termal dapat menurunkan tegangan putus, perpanjangan putus, dan kekuatan sobek komposit, namun dapat meningkatkan kekerasan komposit. Komposit KA/EPDM  dengan penggunaan EPDM hingga 40% memenuhi persyaratan sifat mekanik bantalan dermaga sesuai SNI 3568:2006 Vulkanisat karet kompon bantalan dermaga
The Effect of Type and Ratio of Hardener and Curing System on the Curing Characteristics of Epoxy Resin hesty eka mayasari
Jurnal Teknologi Proses dan Inovasi Industri Vol 7, No 1 (2022): Vol. 7, No. 1, Juli 2022
Publisher : Balai Riset Dan Standardisasi Industri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36048/jtpii.v7i1.7616

Abstract

Epoxy has many advantages and it is widely used in various fields. Hardener is a curing agent to form cured epoxy. The type and composition of the hardener and the curing system need to be studied to get the right formulation and process. This study used hardeners that are common in the market, i.e. cycloaliphatic amine (CAA) and polyaminoamide (PAA). Mixing of epoxy and hardener was done manually using room temperature vulcanization (RTV) and heating curing systems. This study aims to study the effect of the type and ratio of hardener and curing system on the curing characteristics of the epoxy resin. CAA hardener formed cured epoxy at room temperature with ratio epoxy:CAA 60:40. PAA hardener doesn’t formed cured epoxy at room temperature. The heating in curing process formed cured epoxy with epoxy:hardener (CAA or PAA) ratio of 80:20, 60:40, 40:60. CAA can be used at room temperature RTV with a ratio of 60:40 to get an efficient process
The Effect of Type and Ratio of Hardener and Curing System on the Curing Characteristics of Epoxy Resin hesty eka mayasari
Jurnal Teknologi Proses dan Inovasi Industri Vol 7, No 1 (2022): Vol. 7, No. 1, Juli 2022
Publisher : Balai Riset Dan Standardisasi Industri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36048/jtpii.v7i1.7616

Abstract

Epoxy has many advantages and it is widely used in various fields. Hardener is a curing agent to form cured epoxy. The type and composition of the hardener and the curing system need to be studied to get the right formulation and process. This study used hardeners that are common in the market, i.e. cycloaliphatic amine (CAA) and polyaminoamide (PAA). Mixing of epoxy and hardener was done manually using room temperature vulcanization (RTV) and heating curing systems. This study aims to study the effect of the type and ratio of hardener and curing system on the curing characteristics of the epoxy resin. CAA hardener formed cured epoxy at room temperature with ratio epoxy:CAA 60:40. PAA hardener doesn’t formed cured epoxy at room temperature. The heating in curing process formed cured epoxy with epoxy:hardener (CAA or PAA) ratio of 80:20, 60:40, 40:60. CAA can be used at room temperature RTV with a ratio of 60:40 to get an efficient process
Sifat Mekanik dan Karakteristik Termal Karet Alam/EPDM untuk Bantalan Dermaga hesty eka mayasari; agung yanuar wirapraja
Jurnal Teknologi Proses dan Inovasi Industri Vol 7, No 1 (2022): Vol. 7, No. 1, Juli 2022
Publisher : Balai Riset Dan Standardisasi Industri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36048/jtpii.v7i1.7708

Abstract

Bantalan dermaga adalah salah satu bagian penting pada pelabuhan. Dalam penelitian ini digunakan karet alam (KA)/ Ethylene propylene diene monomer rubber (EPDM) sebagai bahan pembuatan bantalan dermaga. Komposit KA/EPDM dibuat menggunakan two-roll mill dengan variasi komposisi EPDM (10-50%). Sifat mekanik seperti tegangan putus, perpanjangan putus, kekerasan, ketahanan sobek, serta ketahanan pengusangan dan sifat termal dipelajari menggunakan tensile strength tester, hardness tester, oven, dan  Shimadzu DTG 60. Kandungan EPDM yang semakin tinggi dapat menurunkan tegangan putus, perpanjangan putus, dan kekuatan sobek komposit. Namun EPDM dapat meningkatkan ketahanan termal komposit KA/EPDM. Pengusangan termal dapat menurunkan tegangan putus, perpanjangan putus, dan kekuatan sobek komposit, namun dapat meningkatkan kekerasan komposit. Komposit KA/EPDM  dengan penggunaan EPDM hingga 40% memenuhi persyaratan sifat mekanik bantalan dermaga sesuai SNI 3568:2006 Vulkanisat karet kompon bantalan dermaga
Co-Authors agung yanuar wirapraja Agung Yanuar Wirapraja Noor Maryam Setyadewi