نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، مهندسی مکانیک، دانشگاه سمنان، سمنان.

2 استادیار، مهندسی مکانیک، دانشگاه شهید بهشتی، تهران.

3 استاد، مهندسی پلیمر، پژوهشگاه پلیمر و پتروشیمی ایران، تهران.

10.22068/jstc.2022.549961.1774

چکیده

در این مقاله، افزودن نانوذرات کاربید سیلیسیم (SiC) به وسیله فرایند اصطکاکی اغتشاشی (FSP) به ترکیب پلی آمید 6 (PA6)/ لاستیک آکریلونیتریل بوتادین (NBR) انجام گرفت. بهینه سازی پارامتر های فرایندی سرعت دورانی پین (ω) و سرعت خطی شولدر (V) و پارامتر موادی مقدار نانوذره کاربید سیلیسیم (S) نیز در جهت دستیابی به پاسخ های مکانیکی بهینه استحکام کششی و تغییر طول در هنگام شکست از روش سطح پاسخ (RSM) استفاده شد. اعتبار سنجی نتایج مکانیکی با استفاده از مقایسه ریزساختار نمونه های نانوکامپوزیتی با میکروسکوپ الکترونی روبشی (SEM) انجام شد. با استفاده از مدل‌ های ریاضی، نتایج نشان داد که استحکام کششی و تغییر طول در هنگام شکست با افزایش سرعت چرخش از 800 rpm به 1200 rpm در مقادیر ثابت کاربید سیلیسیم و سرعت خطی افزایش می‌یابد. بعلاوه، نتایج بهینه سازی اثبات کرد، با انتخاب مقادیر 1200 rpm، 20 mm/min و 2.784 wt.% کاربید سیلیسیم به ترتیب به عنوان پارامتر های فرایندی و موادی، شرایط برای دستیابی به حداکثر مقدار استحکام کششی و تغییر طول در هنگام شکست به طور همزمان فراهم خواهد شد. با استفاده از تصاویر میکروسکوپ الکترونی روبشی مشاهده شد، تغییرات در خواص مکانیکی به تغییر اندازه فاز الاستومری NBR در ریزساختار نمونه های مختلف وابسته است.

کلیدواژه‌ها

عنوان مقاله [English]

Experimental and mathematical investigation of mechanical and microstructural properties of PA6/NBR nanocomposite reinforced with Silicon carbide nanoparticles

نویسندگان [English]

  • Hadi solymani 1
  • Mohammad Reza Nakhaei 2
  • Ghasem Naderi 3

1 Faculty of Mechanical Engineering, Semnan University, Semnan, Iran

2 Faculty of Mechanics and Energy, Shahid Beheshti University, Tehran, Iran.

3 Faculty of Processing, Iran Polymer and Petrochemical Institute, Tehran, Iran.

چکیده [English]

In this paper, the addition of silicon carbide (SiC) nanoparticles to polyamide 6 (PA6) / acrylonitrile-butadiene rubber (NBR) blends was performed by friction stir process. In order to achieve optimal mechanical responses of tensile strength and elongation at break, response surface methodology (RSM) was used to optimize the process parameters of rotational speed (ω), traverse speed (V) and material parameter as silicon carbide nanoparticles (S) content. The validation of the mechanical results was done with compare the microstructure of nanocomposite samples by scanning electron microscopy (SEM). Using mathematical models, the results showed that tensile strength and elongation at break are increased by increasing the rotational speed from 800 rpm to 1200 rpm when the values of silicon carbide content and traverse speed are constant. By selecting the rotational speed of 1200 rpm, traversed speed of 20 mm/min, and 2.784 wt.% of SiC process and material parameters, the maximum tensile strength, and elongation at break can be achieved. Observation of scanning electron microscopy images confirmed that the changes in mechanical properties are related to the changes in the elastomeric phase of NBR.

کلیدواژه‌ها [English]

  • Polyamide 6
  • Acrylonitrile butadiene rubber
  • Silicon carbide
  • Friction stir process
  • Response surface methodology
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