بررسی خواص مکانیکی، حرارتی و ریزساختار ترکیب پلی آمید6/آکریلونیتریل بوتادین تقویت‌شده با نانوذرات کاربید سیلیسیم

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، دانشکده مهندسی مکانیک، دانشگاه سمنان، سمنان، ایران

2 استادیار، دانشکده مهندسی مکانیک، دانشگاه شهید بهشتی، تهران، ایران

چکیده

در این مقاله، از فرایند اصطکاکی اغتشاشی (FSP) برای افزودن درصدهای وزنی متنوع از نانوذرات کاربید سیلیسیم (SiC) به فاز پایه PA6/NBR استفاده شد. همچنین به کمک روش سطح پاسخ (RSM) براساس طرح باکس-بنکن، تأثیر سه متغیر سرعت چرخش ابزار دورانی (ω)، سرعت خطی ابزار (V) و درصد وزنی نانوذره کاربید سیلیسیم (S) بر خواص مکانیکی (مدول یانگ و استحکام ضربه­‌ای) مورد بررسی قرار گرفت. به منظور چگونگی پراکندگی نانوذرات در فاز پایه و اثر افزودن آن­‌ها بر ریزساختار ترموپلاستیک الاستومر PA6/NBR، از تصاویر میکروسکوپ الکترونی روبشی (SEM) بهره گرفته شد. علاوه بر این، با استفاده از آزمون­‌های گرماسنجی تفاضلی روبشی (DSC) و آنالیز حرارتی (TGA)، خواص حرارتی نمونه‌­های PA6/NBR/SiC با درصدهای مختلف وزنی از نانوذرات کاربید سیلیسیم بررسی شد. مقادیر به دست آمده از معادلات رگرسیون نشان داد در شرایطی که سرعت چرخش ابزار دورانی 1200 دور بر دقیقه، سرعت خطی ابزار 20 میلی‌متر بر دقیقه و مقدار درصد وزنی نانوذره استفاده شده 8/3 باشد، حداکثر مدول یانگ و استحکام ضربه‌­ای به ترتیب 18/665 مگاپاسکال و 26/62 ژول بر متر به دست خواهد آمد؛ همچنین دمای تبلور و دمای ذوب نیز به ترتیب تا مقادیر 198 و 8/222 درجه سانتی­‌گراد افزایش خواهد یافت.

کلیدواژه‌ها

عنوان مقاله [English]

Investigation of mechanical, thermal and microstructural properties of PA6/NBR nanocomposites reinforced with silicon carbide nanoparticles

نویسندگان [English]

  • Hadi Soleymani 1
  • Mohammad Reza Nakhaei 2
1 Faculty of Mechanical Engineering, Semnan University, Semnan, Iran
2 Faculty of Mechanics and Energy, Shahid Beheshti University, Tehran, Iran
چکیده [English]

In this article, the friction stir process (FSP) was used to add various weight percentages of silicon carbide (SiC) nanoparticles to the base phase of PA6/NBR. Also, the effect of three variables of the rotation speed tool (ω), traverse speed (V) and the weight percentage of silicon carbide nanoparticle (S) on the mechanical properties (young’s modulus and impact strength) were investigated by response surface methodology (RSM) based on the Box-Behnken design. Scanning electron microscope (SEM) was used to determine the dispersion of nanoparticles in the base phase and the effect of their addition on the microstructure of PA6/NBR thermoplastic elastomer. Moreover, the thermal properties of PA6/NBR/SiC samples with different weight percentages of silicon carbide nanoparticles were investigated by differential scanning calorimetry (DSC) and thermo gravimetric analysis (TGA). The values obtained from the regression equations showed that, under optimal conditions of the rotational speed of 1200 rpm, traverse speed of 20 mm/min and the weight percentage of nanoparticles of 3.8 wt. %, the maximum young's modulus and impact strength 665.18 MPa and 62.26 J/m, respectively could be obtained. Also the crystallization and melting temperature increased to 198 and 222.8 °C, respectively.

کلیدواژه‌ها [English]

  • Polyamide 6
  • Acrylonitrile Butadiene Rubber
  • Silicon Carbide
  • Friction Stir Process
  • Response Surface Methodology

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