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Lem kompon karet untuk sepatu kulit yang dibuat dengan proses vulkanisasi Herminiwati, Herminiwati; Yuniari, Arum; Susila, R Jaka
Majalah Kulit, Karet, dan Plastik Vol 24, No 1 (2008): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (609.031 KB) | DOI: 10.20543/mkkp.v24i1.319

Abstract

The purpose of this research was to find rubber compound adhesive formula for preparing leather shoes of direct vulcanizing process. Leather shoes manufactured by vulcanizing process need a suitable rubber compound adhesive for joining the leather uppers and unvulcanized rubber compound soles. The amount of tackifier in rubber compound adhesive influence the adhesive bonding strength. In preparing the adhesive formula, the effect of coumarone resin addition as tackifier were varies in the mount of 5 , 10 and 15 phr respectively. Rubber compound adhesive was produced by two roll mill machine, after that compound were dissolved in wash benzene with ratio 1 : 10. The prepared adhesive then was applied to manufacture leather shoes using vulcanization moulding at temperature 1700 C and 150 kg/cm2 pressure for 8 minutes. The best adhesive formula could be as the following : natural rubber 100 phr, calcium silicate 5 phr, coumarone resin 10 phr, zinc oxide 10 phr, stearic acid 2 phr, AOSP 2 phr, MBTS 0,8 phr; TMTD 0,2 phr and sulphur 2 phr. The best formula had the peeling strength of the outsole 65,25 kg, peeling strength of the insole 1553 g/cm, and could meet the requirements of JIS 5050, 1984 for Leather shoes. Viscosity of the formula was 2250 cp. Key words : adhesive, rubber compound, leather shoes, vulcanizing process.  ABSTRAK             Penelitian ini bertujuan untuk mendapatkan formula lem kompon karet untuk pembuatan sepatu kulit secara proses vulkanisasi. Setiap kulit dibuat dengan proses vulkanisasi, memerlukan lem kompon karet yang sesuai untuk melekatkan kulit atas dan sepatu dengan sol karet yang belum tervulkanisasi. Banyaknya tackfier dalam lem kompon karet mempengaruhi kekuatan rekat lem. Dalam penyusunan formula lem, penambahan coumarone resin sebagai tacfier divariasi berturut-turut sebesar 5, 10 dan 15 phr. Lem komponen karet dibuat dengan mesin two roll mill, kemudian kompon dilarutkan dalam wash bensin dengan perbandingan 1 : 10. Selanjutnya lem digunakan untuk pembuatan sepatu kulit menggunakan mesin cetak vulkanisasi pada suhu 170 0C dan tekanan 150 kg/cm2 selama 8 menit. Formula lem terbaik terdiri atas karet alam 100 phr, kalsium silikat 5 phr, coumaron resin 10 phr, asam stearate 2 phr, AODP 2 phr, MBTS 0,8 phr; TMTD 0,2 phr dan belerang 2 phr. Formula terbaik mempunyai kuat rekat sol luar dengan atasan sepatu sebesar 65,25 kg, kuat rekat sol dalam dengan sol luar 1553 g/cm damn memenuhi syarat JIS S 5050, 1984 untuk Sepatu jukit Viskositas formula sebesar 2250 cp. Kata kunci : Lem, kompon karet, sepatu kulit, proses vulkanisasi. 
Pengaruh filler PCC (precipitated calcium carbonate) terhadap sifat mekanik, elektrik, termal dan morfologi dari komposit HDPE/PCC Kasmudjiastuti, Emiliana; Yuniari, Arum
Majalah Kulit, Karet, dan Plastik Vol 28, No 1 (2012): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (538.533 KB) | DOI: 10.20543/mkkp.v28i1.203

Abstract

ABSTRACTThe purpose of this research was to know the effect of precipitated calcium carbonate(PCC) on morphology and quality of the HDPE g-MAH with PCC as filler. The process of HDPEg-MAH /PCC composites with a rheomix 3000 Haake at 180 º C and 50 rpm of rotor speed for 10minutes. The composition of HDPE and additives are set constant, and PCC content was varied10, 15 , 20, 30,40 and 50 phr (per hundred resin). The results of scanning electron microscopyshowed that composite HDPE-g-MAH dan 30 phr of PCC was compatibel. Analysis functionalgroup on composites with Fourier Transform Infra Red (FTIR) indicated wave band on 3449,61cm-1, 2921 cm-1, 1707,21 cm-1, 1485 cm-1 dan 722,03 cm-1. The test results of the electricalproperties (insulation resistance : ≥ 4 MΩ and electric resistance : no holed), and thermalproperties (sparks : no flame and tissue not burned) indicate that all of the composite HDPE-g-MAH/PCC fullfill SNI 04-6504-2001, except resistance to heat.Keywords: HDPE, PCC, maleic anhidride, electrical reistance, thermal resisitanceABSTRAKTujuan penelitian ini adalah untuk mengetahui pengaruh penggunaan filler PrecipitatedCalcium Carbonat (PCC) terhadap morfologi, sifat mekanik, termal dan elektrik kompositHDPE-g-MAH dengan filler PCC. Pembuatan komposit HDPE-g-MAH dengan filler PCCmenggunakan mesin Rheomix 3000 Haake dengan suhu 180oC, selama 10 menit dan kecepatan50 rpm. Komposisi HDPE dan bahan aditif dibuat tetap, dan kandungan PCC divariasi 0; 10 ;20 ; 30; 40 dan 50 phr (per hundred resin). Morfologi komposit diamati dengan ScanningElectron Microscope (SEM) dengan metode secondary electron image perbesaran 2000 X dankarakterisasi gugus fungsi pada komposit dengan menggunakan Fourier Transform Infra Red(FTIR). Hasil pengamatan morfologi SEM memperlihatkan bahwa permukaan komposit HDPEg-MAH dan PCC 30 phr adalah kompatibel dan hasil uji FTIR terlihat adanya puncak serapanpada panjang gelombang 3449,61 cm-1, 2921 cm-1, 1707,21 cm-1, 1485 cm-1 dan 722,03 cm-1. Darihasil uji mekanikal komposit HDPE-g-MAH berisi filler PCC 30 phr mempunyai densitas 1,18gr/cm3, kekuatan tarik 254,22 kg/cm2, perpanjangan putus 20%, kekerasan 96,6 shore D danketahanan pukul takik 25 kJ/m2. Hasil uji sifat elektrikal (resistansi isolasi : ≥ 4 MΩ dan kuatlistrik: tidak tembus) dan uji thermal (percikan api: tidak ada api dan tisu tidak terbakar)menunjukkan bahwa semua komposit HDPE-g-MAH dengan filler PCC memenuhi SNI 04-6504-2001, kecuali untuk ketahanan panas (uji sifat thermal).Kata kunci: HDPE, PCC, maleat anhidrat, sifat elektrikal, sifat thermal
Pengaruh sistem vulkanisasi konvensional (CV) dan semi efisien (SEV) terhadap sifat aging dan termal vulkanisat campuran karet alam dan karet butil Yuniari, Arum; Sholeh, Muhammad; Indrajati, Ihda Novia
Majalah Kulit, Karet, dan Plastik Vol 31, No 2 (2015): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (105.332 KB) | DOI: 10.20543/mkkp.v31i2.173

Abstract

The purpose of this research was to study the effect of CV and SEV curing systems on aging and thermal properties of natural rubber and butyl rubber blends. The mixing of rubber and rubber chemicals using two roll-mills and the vulcanization process was carried out by the hydraulic press at 160° C and 150 kg/cm2. The research design used two variations; first, the CV curing system (accelerator/sulfur) (1.0/2.5) phr and SEV curing system (accelerator/sulfur) (2.1/1.5) phr, second, the ratio of natural rubber/butyl: 100/0; 95/5; 90/10; 85/15; 80/20; 75/25; 70/30; 65/35; 60/40 and 55/45 phr. The parameter observed were tensile strength, elongation at break, hardness before and after aging and thermal properties, e.g.TG/DTA and DSC. The results showed that CV curing systems provided tensile, elongation at break properties gave higher quality and better aging properties. TG/DTA analysis of vulcanizates processed with CV curing systems provided slightly better thermal stability than of the SEV curing system.Keywords: natural rubber, butyl rubber, curing, CV, SEV, aging, thermal.ABSTRAK Penelitian ini bertujuan untuk mempelajari pengaruh sistem vulkanisasi CV dan SEV terhadap sifat aging dan termal campuran karet alam dan karet butil. Pencampuran karet dan bahan kimia karet dilakukan mengunakan mesin two roll mil dan proses vulkanisasi dilakukan dengan mesin hydraulic press pada suhu 160ºC dan tekanan 150 kg/cm2. Rancangan penelitian menggunakan 2 variasi. Variasi pertama sistem vulkanisasi CV (akselerator/sulfur) (1,0/2,5) phr dan sistem vulkanisasi SEV (akselerator/sulfur) (2,1/1,5) phr. Variasi kedua adalah perbandingan karet alam/butil: 100/0; 95/5; 90/10; 85/15; 80/20; 75/25; 70/30; 65/35; 60/40 dan 55/45 phr. Pengujian yang diamati adalah tegangan putus, perpanjangan putus, kekerasan sebelum dan sesudah aging serta sifat termal: DTA/TGA dan DSC. Hasil uji menunjukkan vulkanisat yang diproses dengan sistem vulkanisasi CV mempunyai sifat tegangan putus, perpanjangan putus lebih tinggi dan sifat aging lebih baik. Analisa DTA/TGA vulkanisat yang diproses dengan sistem vulkanisasi CV memberikan stabilitas termal sedikit lebih baik dari pada sistem vulkanisasi SEV.Kata kunci: karet alam, karet butil, vulkanisasi, CV, SEV, aging, termal.
Sifat elektrik dan termal nanokomposit poly(vinyl chloride) (PVC)/low density polyethylene (LDPE) Yuniari, Arum
Majalah Kulit, Karet, dan Plastik Vol 30, No 2 (2014): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (730.027 KB) | DOI: 10.20543/mkkp.v30i2.126

Abstract

One of the most serious problems encountered in poly(vinyl chloride) (PVC) processing is due to low thermal stability of the PVC. The purpose of the study was to determine the effect of LDPE and flame retardant on to the electrical and thermal nanocomposites properties The nanocomposites were prepared using a laboplastomill with (15; 20; 25 and 30 phr) LDPE and (30 and 35 phr) flame retardant at 215 ºC and 50 rpm rotor speed. The thermal properties of nanocomposite was evaluated by TGA/DTA and DSC, electrical properties was evaluated by volume resistivity. Thermal analysis results revealed that decomposition of nanocomposites occured at 280 ºC. DSC results show that crystalisation temperatur (Tc) at 250 ºC, melting temperature (Tm) at 260 ºC and glass temperature (Tg) at 60 ºC. The IR spectra of nanocomposites showed that there was absorption at 1579 cm-1 formed polyene (C=C). The electrical testing of nanocomposites fullfill the quality requirements of SNI 04-6504-2001 Lampu swaballast untuk pelayanan umum-persyaratan keselamatan ≥ 4 MΩ..Keywords: nanocomposites, PVC, LDPE, thermal, electrical.ABSTRAKSalah satu permasalahan yang dihadapi pada proses pengolahan poli (vinil klorida) (PVC) adalah stabilitas termal. Tujuan penelitian adalah untuk mengetahui pengaruh LDPE dan flame retardant terhadap sifat elektrik dan termal nanokomposit. Nanokomposit dibuat menggunakan laboplastomil pada suhu 215 ºC dan kecepatan rotor 50 rpm ditambah dengan (15, 20, 25 dan 30 phr) LDPE dan (30 dan 35 phr) flame retardant. Sifat termal nanokomposit dievaluasi dengan TGA/DTA dan DSC, sifat elektrikal dievaluasi dengan volume resistivitas. Hasil uji sifat termal (TGA/DTA) menunjukkan dekomposisi nanokomposit terjadi pada suhu 280 - 400 ºC. Hasil uji DSC menunjukkan bahwa temperatur kristalisasi (Tc) pada 250 ºC, suhu leleh (Tm) pada 260 ºC dan suhu gelas (Tg) pada 60 ºC. Spektrum IR nanokomposit pada panjang gelombang 1579 cm-1 menunjukkan terbentuknya gugus poliena (C=C). Hasil uji sifat elektrik nanokomposit memenuhi persyaratan mutu SNI 04-6504-2001: Lampu swaballast untuk pelayanan umum-persyaratan keselamatan ≥ 4 MΩ.Kata kunci: nanokomposit, PVC, LDPE, termal, elektrik.
Sifat fisika dan analisis gugus fungsi karet seal o-ring dari bahan termoplastik elastomer nitrile butadiene rubber (NBR) dan polyvinyl chloride (PVC) Yuniari, Arum; Sarengat, Nursamsi
Majalah Kulit, Karet, dan Plastik Vol 29, No 1 (2013): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (204.765 KB) | DOI: 10.20543/mkkp.v29i1.215

Abstract

ABSTRACTThe purpose of this research was to determine the physical properties and functionalgroups on O-ring rubber seals made of thermoplastic elastomers blend NBR and PVC.Composition of the NBR / PVC were successively varied : 90/10; 85/15; 80/20; 75/25; 70/30 and65/35 phr. Mixing process between NBR/PVC with additive used a two roll mill within atemperature of 60º - 80 ºC, the vulcanization process used a hydraulic press at a temperature of170 oC and pressure of 150 kg/cm2. The physical properties were evaluated including tensilestrength, elongation at break, hardness, before and after aging, hardness after immersion inisooctane and swelling while analysis of functional groups was also carried out by method ofFourier Transform Infrared Spectrophotometer (FTIR). The result of the best vulcanized wascharacterized by tensile strength 188.93 kg/cm2, the change of tensile strength after aging 2.50%,elongation at break of 400%, the change of elongation at break after aging was 12.5%, hardness75 shore A, the change of hardness after aging 0%, the change of hardness after immersion inisooctane 1.3%, swelling 0.8% and functional group of vulcanisate was indicated by new peak(OH) at wave band of 3468 cm-1. Those formula met the requirements of the technicalspecifications of ASTM D 2000 seal O-ring.Keywords: O-ring rubber seals, NBR, PVC, physical properties, functional groupABSTRAKTujuan penelitian ini adalah untuk mengetahui sifat fisika dan gugus fungsi karet seal Oringyang dibuat dari bahan termoplastik elastomer campuran NBR dan PVC. KomposisiNBR/PVC divariasi berturut-turut 90/10; 85/15; 80/20; 75/25; 70/30 dan 65/35 phr.Pencampuran NBR/PVC dengan bahan tambahan (aditive) menggunakan two roll mill pada suhu60º-80ºC, proses vulkanisasi menggunakan hydraulic press pada suhu 170 ºC dan tekanan 150kg/cm2. Pengujian sifat fisika karet seal O-ring meliputi tegangan putus, perpanjangan putus,kekerasan sebelum dan sesudah aging, kekerasan setelah perendaman dalam isooktan, swellingdan dilakukan juga analisis gugus fungsi dengan Fourier Transform Infrared Spectrophotometer(FTIR). Hasil uji vulkanisat terbaik sebagai berikut: tegangan putus 188,93 kg/cm2, perubahantegangan putus sesudah aging 2,50%, perpanjangan putus 400%, perubahan perpanjangan putussesudah aging 12,5%, kekerasan 75 shore A, perubahan kekerasan sesudah aging 0%, perubahankekerasan sesudah perendaman dalam isooktan 1,3%, swelling 0,8% dan muncul gugusfungsional baru OH pada bilangan gelombang 3468 cm-1. Karet seal O-ring tersebut memenuhipersyaratan ASTM D 2000 tentang spesifikasi teknis seal O-ring.Kata kunci: seal O-ring, NBR, PVC, sifat fisika, gugus fungsi
Spektroscopi FTIR dan sifat mekanik nanokomposit grafting HDPE dan nanoprecipitated calcium carbonate (NPCC) Yuniari, Arum; Kasmudjiastuti, Emiliana
Majalah Kulit, Karet, dan Plastik Vol 28, No 2 (2012): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1037.026 KB) | DOI: 10.20543/mkkp.v28i2.110

Abstract

ABSTRACTThe purpose of this research based on high density polyethylene (HDPE) and nanoprecipitated calciumcarbonate (NPCC) was to evaluate the effect of nanoprecipitated calcium carbonate (NPCC) on FTIR spectroscopy and mechanical properties. The nanocomposites was prepared with a rheomix 3000 Haake at 180 º C and 50 rpm of rotor speed for 10 minutes. The composition of HDPE and additives were permanently, and NPCC content varied 10, 15, 20, 30, 40 and 50 phr (per hundred resin) respectively and control was made inherent NPCC. The nanocomposites were characterized using tensile strength, hardness tester, electro densimeter and Fourier Transform Infra Red (FTIR) spectroscopy techniques. The results of mechanical properties showed that the increasing the amount of NPCC was able increase hardness and density while elongation at break more stable and tensile strength decreased. Analysis functional group on nanocomposites with Fourier Transform Infra Red (FTIR) indicated a new peak on wave band 3472,49 cm-1 (OH stretching).ABSTRAKPenelitian tentang pembuatan nanokomposit dari bahan high density polyethylene(HDPE) dan nanoprecipitated calciumcarbonate (NPCC) bertujuan untuk mengetahui pengaruh penambahan filler NPCC terhadap sifat mekanik dan spektroscopi. Nanokomposit dibuat dengan Rheomix 3000 Haake pada suhu 180oC dan kecepatan 50 rpm selama 10 menit. Komposisi HDPE dan bahan aditif dibuat tetap, dan kandungan NPCC divariasi berturut-turut 10 ; 20 ; 30; 40 dan 50 phr (per hundred resin) dan dibuat kontrol tanpa ditambah NPCC. Sifat mekanik diuji dengan alat ujitensile strength, hardness, densimeter dan karakterisasi gugus fungsi ditentukan menggunakan Fourier Transform Infra Red (FTIR). Hasil uji sifat mekanik menunjukkan semakin tinggi jumlah NPCC kekerasan dan densitas naik, kemuluran tetap sedangkan kuat tarik cenderung turun. Spektrum nanokomposit HDPE/NPCC menunjukkan terjadinya puncak baru pada bilangan gelombang 3472,49 cm-1 (OH stretching).
Karakteristik sifat mekanik, ketahanan api dan pembakaran, dan morfologi nanokomposit campuran PVC dan LDPE Yuniari, Arum
Majalah Kulit, Karet, dan Plastik Vol 30, No 1 (2014): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (810.012 KB) | DOI: 10.20543/mkkp.v30i1.117

Abstract

The  purpose of the study was to determine the effect of addition of low density polyethylene (LDPE) and flame retardant on mechanical properties, resistant to fire and burning and morphology from the mixture of polyvinyl chloride (PVC), LDPE, flame retardant, and nanoprecipitated calcium carbonate (NPCC) as filler. The materials were mixed in laboplastomill at 215 ºC, torque speed 50 rpm, for 10 minutes. Nanocomposite was prepared by PVC/LDPE variations of 100/15; 100/20; 100/25; and 100/30 phr and flame retardant variations of 30 and 35 phr. The results showed that the hihger of LDPE in nanocomposite increased the hardness and impact resistance, however, it decreased the tensile strength, elongation at break, and density. Addition of flame retardant to the nanocomposites showed good resistance to fire and burning, and optimum mechanical properties were found in using of 35 phr flame retardant.The morphology of the nanocomposite, were observed by Scanning Electron Microscope (SEM) confirmed that homogeneous mixture of LDPE dispersed in the PVC matrix.ABSTRAKTujuan penelitian adalah untuk mengetahui pengaruh penambahan low density polyethylene (LDPE) dan flame retardant terhadap sifat mekanik, ketahanan terhadap api dan pembakaran serta morfologi nanokomposit campuran polyvinyl chloride (PVC) dan LDPE. Nanokomposit dibuat dari campuran PVC, LDPE, flame retardant dan nanoprecipitated calcium carbonate (NPCC) sebagai filler. Bahan-bahan dicampur menggunakan laboplastomill pada suhu 215 ºC, kecepatan torsi 50 rpm selama 10 menit. Nanokomposit PVC/LDPE dibuat dengan variasi 100/15; 100/20; 100/25 dan 100/30 phr serta variasi flame retardant (FR) 30 dan 35 phr. Hasil uji menunjukkan bahwa jumlah LDPE naik dalam nanokomposit: kekerasan dan ketahanan pukul takik menunjukkan kenaikan, tetapi kuat tarik, kemuluran, dan berat jenis turun. Penambahan flame retardant menyebabkan nanokomposit mempunyai ketahanan yang baik terhadap api dan pembakaran, dan optimun sifat mekanik diperoleh pada penggunaan flame retardant 35 phr. Morfologi nanokomposit campuran PVC dan LDPE diamati dengan Scanning Electron Microscope (SEM), campuran homogen LDPE terdispersi pada matriks PVC.
Pengaruh sulfur terhadap sifat fisika campuran pale crepe dan SBR untuk karet tahan panas Yuniari, Arum; Sarengat, Nursamsi; Lestari, Sri Brataningsih Puji
Majalah Kulit, Karet, dan Plastik Vol 29, No 2 (2013): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (735.187 KB) | DOI: 10.20543/mkkp.v29i2.181

Abstract

ABSTRACTSulfur plays an important role in the rubber vulcanization process especially in the formation of crosslinks. Heat resistant rubber made from mixing pale crepe and SBR requires the right amount of sulfur as crosslinking agent. The purpose of the study was to determine the effect of the addition of sulfur on the changes in physical properties before and after aging. Heat resistant rubber was made with variation of pale crepe/SBR: 80/20; 70/30; 60/40; 50/50 phr and sulfur variation of 1; 1.5 phr. The results showed that sulfur was influential in the crosslinks formation. The addition of 1 phr sulfur gave higher physical properties of the vulcanized with 1.5 phr sulfur. The changes of physical properties after aging process of the vulcanized with sulfur 1 phr was lower than the vulcanized with sulfur 1.5 phr. Vulcanized pale crepe/SBR (70/30) with 1 phr sulfur could be applied as heat-resistant rubber products. Keywords: Pale crepe/SBR blends, sulfur, physical properties, heat resistant rubber ABSTRAKSulfur memegang peranan penting dalam proses vulkanisasi karet terutama dalam hal pembentukan ikatan silang. Karet tahan panas yang dibuat dari pencampuran pale crepe dan SBR membutuhkan sulfur dalam jumlah yang tepat sebagai crosslinking agent. Tujuan dari penelitian adalah untuk mengetahui pengaruh penambahan sulfur terhadap perubahan sifat fisika sebelum dan sesudah aging. Karet tahan panas dibuat dengan variasi pale crepe/SBR: 80/20; 70/30; 60/40; 50/50 phr dan variasi sulfur 1 dan 1,5 phr. Hasil penelitian menunjukkan bahwa sulfur sangat berpengaruh terhadap pembentukan ikatan silang. Penambahan sulfur 1 phr memberikan sifat fisika lebih tinggi dari pada vulkanisat dengan sulfur 1,5 phr. Perubahan sifat fisika sesudah aging untuk vulkanisat dengan sulfur 1 phr lebih kecil dari vulkanisat dengan sulfur 1,5 phr. Vulkanisat pale crepe/SBR (70/30) dengan sulfur 1 phr dapat digunakan untuk produk karet tahan panas. Kata kunci: Pale crepe/SBR blends, sulfur, sifat fisika, karet tahan panas.
MKKP Vol. 32 No. 1 (2016) Reviewer Acknowledgement Yuniari, Arum
Majalah Kulit, Karet, dan Plastik Vol 32, No 1 (2016): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (211.976 KB) | DOI: 10.20543/mkkp.v32i1.1372

Abstract

Determination of vulcanization rate constant, crosslink density, and free sulfur content on carbon black flled EPDM Setyorini, Ike; Yuniari, Arum
Majalah Kulit, Karet, dan Plastik Vol 33, No 2 (2017): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (679.67 KB) | DOI: 10.20543/mkkp.v33i2.3345

Abstract

Different ethylene propylene diene monomer (EPDM) composite with the carbon black (CB) variation of 50, 60, and 70 phr (per hundred rubbers) is compounded by using an efcient (EV), semi-efcient (SEV), and conventional (CV) sulfur vulcanization systems. This research aims to investigate the effect of vulcanization systems and carbon black content on the vulcanization rate constant, the crosslink density, and the free sulfur content. This research shows the EV system resulting in the fastest vulcanization rate constant (0.0191/second), the lowest overallcrosslink density (0.0022 mol.cm-3), and the highest percentage of free sulfur content in the EPDM vulcanization (0.40 %). The CV system provides the slowest vulcanization rate constant (0.0061/second) and the highest overall crosslink density (0.0034 mol/cm-3). The percentage of free sulfur content in the EPDM vulcanization of CV system is between EV and SEV systems. The SEV system provides the vulcanization with the characteristic of vulcanization rate constant and overall crosslink density between EV and CV systems as well as provides the lowest percentage of free sulfur content (0.29 %). The higher carbon black loading in each vulcanization systems means the lower rate constant of vulcanization and the higher overall crosslink density.
Co-Authors Any Setyaningsih, Any C. Yuwono Sumasto, C. Yuwono Dwi Wahini Nurhajati, Dwi Wahini Emiliana Kasmudjiastuti, Emiliana Herminiwati Herminiwati, Herminiwati Ihda Novia Indrajati, Ihda Novia Irene Sri Sukaeni, Irene Sri Isananto Winursito, Isananto Kusumo Retno Winahyu, Kusumo Retno M Sri Wahyuni, M Sri M. Sri Wahyuni, M. Sri MUHAMMAD SHOLEH Niken Karsiati, Niken Nursamsi Sarengat, Nursamsi R Jaka Susila, R Jaka Setyorini, Ike Sofyan karani, Sofyan Sri Brataningsih Puji Lestari, Sri Brataningsih Puji Supraptiningsih Supraptiningsih, Supraptiningsih