Enhanced thermo-oxidative aging resistance of EPDM at high temperature by using synergistic antioxidants

Ning, Nanying; Ma, Qin; Zhang, Yunqiang; Zhang, Liqun; Wu, Hanguang; Tian, Ming

doi:10.1016/j.polymdegradstab.2014.01.037

Cited by 67 publications

(46 citation statements)

References 17 publications

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“…Moreover, a high ENB (ethylidene-2-norbornene) content was used in this study (8.7%). The greater the ENB content, the easier the EPDM is oxidized (Ning et al, 2014). After stage II is complete, the char residue is remaining (38.86-39.89%).…”

Section: Results and Discussion Thermal Degradationmentioning

confidence: 99%

Kinetic analysis of thermal degradation of NR/EPDM blends with maleic anhydride as compatibilizer: The eﬀect of the reactive accelerators

Mayasari

Yuniari

2017

MKKP

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Thermal characteristic is important to determine the thermal resistance of a polymer. In this work, the thermal characteristics of the NR/EPDM blends was investigated to study the storage and application condition of the blends. The NR/EPDM blends were prepared in the two-roll mill by using MAH as a compatibilizer with several types of accelerators, i.e., MBTS from thiazole group, the combination of MBTS and TMTD from thiuram group, and TBBS from sulphenamide group. This research used the thermogravimetric method with the heating rate of 10, 15, and 20 ºC/min. The kinetic parameters are calculated by using Coats-Redfern equation. The degradation of NR/EPDM blends occurs in two stages (first stage at 220-420 ºC and second stage at 420-520 ºC). Combination of MBTS and TMTD give higher energy activation (112.236 kJ/mol), followed by MBTS-blend (111.999 kJ/mol), and TBBS-blend (110.856 kJ/mol). Combination of MBTS and TMTD accelerator with MAH as the compatibilizer is the proper choice for NR/EPDM blends to get a good thermal stability.

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Section: Results and Discussion Thermal Degradationmentioning

confidence: 99%

Kinetic analysis of thermal degradation of NR/EPDM blends with maleic anhydride as compatibilizer: The eﬀect of the reactive accelerators

Mayasari

Yuniari

2017

MKKP

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“…Pada tahap ini terjadi oksidasi EPDM, karena dalam penelitian ini digunakan EPDM dengan kandungan ENB (ethylidine-2-norbornene) sebesar 8,7%, dimana semakin besar kandungan ENB maka semakin mudah EPDM teroksidasi. Pembentukan radikal bebas hasil reaksi oksidasi akan menyerang ikatan rangkap pada ENB di dalam rantai EPDM (Ning et al 2014). Pada tahap awal ini juga terjadi pelepasan zat yang mudah menguap seperti minyak proses, asam stearat, TMQ, TMTD, MBT (titik didih masing-masing 302°C, 361°C, 320°C, 307°C, 305°C).…”

Section: Hasil Dan Pembahasanunclassified

Karakteristik termogravimetri dan kinetika dekomposisi EPDM dengan bahan pengisi carbon black

Mayasari

Yuniari

2016

MKKP

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The thermal characteristics of a material are important to learn in order to know the thermal stability of the materials. Ethylene propylene diene monomer (EPDM) is a synthetic rubber that is widely used in industry dueto its resistance to aging, ozone, and chemicals. The kinetic parameters and thermal decomposition of vulcanized EPDM were studied using thermogravimetric method with various vulcanization systems (efficient, semi-efficient, and conventional vulcanization system) and various carbon black (CB) as filler (50, 60, and 70 phr ABSTRAKKarakteristik termal suatu material penting untuk dipelajari untuk mengetahui stabilitas termal bahan tersebut. Etilen propilen diena monomer (EPDM) adalah salah satu karet sintetis yang banyak digunakan dalam industri karena ketahanan terhadap aging, ozon, dan kimia yang baik. Pada studi ini akan dipelajari parameter kinetika dan sifat dekomposisi termal vulkanisat EPDM dengan metode termogravimetri dari berbagai variasi sistem vulkanisasi (efisien, semi-efisien, dan konvensional) dan variasi carbon black (CB) (50,60, dan 70 phr) sebagai bahan pengisi. Dekomposisi terjadi dalam dua tahap; oksidasi EPDM dan hilangnya bahan mudah menguap kemudian dekomposisi EPDM. Parameter kinetika dekomposisi termal didekati dengan persamaan Coats Redfern. Energi aktivasi dan massa yang terdekomposisi meningkat dengan berkurangnya kandungan CB. Vulkanisat EPDM dengan bahan pengisi CB memiliki ketahanan cukup baik terhadap dekomposisi termal. Proses dekomposisi dapat dilihat secara detail pada paper ini.Kata kunci: EPDM, dekomposisi termal, kinetika, termogravimetri, carbon black. PENDAHULUANMaterial polimer yang telah mengalami proses pengolahan, penggunaan, dan penyimpanan akan mengalami degradasi karena pengaruh suhu dan waktu. Degradasi ini dapat disebabkan oleh bahan kimia seperti pemutusan ikatan dan oksidasi atau perubahan fisik yang menghasilkan bahan dengan sifat yang berbeda dalam struktur polimernya. Pada umumnya sifat fisika dan sifat mekanis akan menurun. Tingkat perubahan sifat termal oleh pengaruh suhu disebut sebagai ukuran stabilitas termal suatu bahan (Alneamah & Almaamori, 2015).EPDM adalah karet nonpolar dan memiliki sedikit ikatan tidak jenuh sehingga memiliki sifat ketahanan yang baik terhadap bahan kimia, cuaca, dan pengusangan. Rumus struktur EPDM dapat dilihat pada Gambar 1. EPDM adalah salah

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“…The higher the ENB content, the more sensitive EPDM to thermal oxidation, and the easier to degrade. EPDM has good ozone and heat resistance but is less resistant to nonpolar solvents (Jovanović et al, 2013;Ning et al, 2014;. Nowadays, researchers try to blend two or more rubber to get excellent rubber properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of natural zeolite as substrate filler on the properties of NBR/EPDM blend

Mayasari¹,

Setyadewi²

2019

MKKP

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The NBR/EPDM blend has great ozone, oil, and heat resistance. Carbon black is the most common used filler material for rubber goods. But, it is less environmentally friendly and less healthy friendly. In this study, it would be studied the use of natural zeolite as a substitute for the filler. This blend was carried out by a two-roll mill and tested by rheometer and tensile strength tester. From the research that has been done, it was known that vulcanizate with carbon black was better than all of the vulcanizate using zeolite as filler substitute. Vulcanizate with CB provided the fastest curing time, the fastest reaction speed and also the best mechanical properties. Vulcanization with the 10 phr zeolite gives the optimum curing time and the best mechanical properties compared to the substitution of other fillers. This shows that 10 phr zeolite (16.7%) can be a suitable filling material for NBR/ EPDM blend.

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Enhanced thermo-oxidative aging resistance of EPDM at high temperature by using synergistic antioxidants

Cited by 67 publications

References 17 publications

Kinetic analysis of thermal degradation of NR/EPDM blends with maleic anhydride as compatibilizer: The eﬀect of the reactive accelerators

Kinetic analysis of thermal degradation of NR/EPDM blends with maleic anhydride as compatibilizer: The eﬀect of the reactive accelerators

Karakteristik termogravimetri dan kinetika dekomposisi EPDM dengan bahan pengisi carbon black

Effect of natural zeolite as substrate filler on the properties of NBR/EPDM blend

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