Improving Heat Ageing, Mechanical Properties, and Thermal Conductivity of Silicon Rubber by Surface Modification of Iron Oxide and Field Testing of Silicon Rubber O-rings
محل انتشار: مجله علوم و فن آوری نفت، دوره: 13، شماره: 4
سال انتشار: 1402
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 82
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شناسه ملی سند علمی:
JR_JPSTR-13-4_002
تاریخ نمایه سازی: 20 خرداد 1403
چکیده مقاله:
Silicone rubber (SR) compounds were prepared to apply O-ring at high temperatures. Silane surface modified Fe۲O۳ and unmodified Fe۲O۳ were added to the SR compounds, and the compounds were assessed by analyses of FESEM (Field-Emission Scanning Electron Microscopy) (for morphology) and TGA and tests of thermal conductivity at different temperatures, thermal aging, hardness, tensile and compression set. Moreover, O-rings were prepared and field tested in an online Gas Chromatograph (GC) of Chemical Analysis in one Petrochemical Company under the pressure of ۷ bar and temperature of ۱۸۰ °C. The obtained results show that the thermal conductivity, aging resistance, thermal stability, and mechanical properties of SR decreased in the following order: surface-modified Fe۲O۳-filled SR, unmodified Fe۲O۳-filled SR, and SR without Fe۲O۳. Overuse of Fe۲O۳ reduced mechanical properties and hardened processability. The thermal conductivity of SR filled with varying volume percent of modified and unmodified Fe۲O۳ decreased as the temperature increased. Using surface-modified Fe۲O۳ increased thermal conductivity and improved aging resistance, ultimately enhancing thermal resistance. It is particularly beneficial for the production of O-rings resistant to high temperatures. The field-test results confirmed that the O-rings were compatible with high-temperature conditions. Furthermore, after testing, the O-rings exhibited low volume swelling and a smooth surface without any cracks, blisters, or unevenness.
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نویسندگان
Mahboobeh Rahnavard
Advanced Polymer Materials and Processing Lab, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
Ghodratolah Hashemi Motlagh
Advanced Polymer Materials and Processing Lab, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
Javad Heidarian
Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
Mostafa Dehghani Mobarake
Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
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