بهینه سازی خواص مکانیکی و ساختاری پلی پروپیلن تقویت شده با ترکیب لاستیک طبیعی- نانوذرات پرلیت با استفاده از روش سطح پاسخ

نوع مقاله : مقاله پژوهشی

نویسندگان

• هادی سلیمانی ¹
• عبدالحسین فریدون ¹
• علیرضا آلبویه ²
• محمدرضا نخعی ³

¹ گروه مهندسی مکانیک، دانشکده مکانیک، دانشگاه سمنان، سمنان، ایران

² گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه دامغان، دامغان، ایران

³ دانشکده مکانیک و انرژی، دانشگاه شهید بهشتی، تهران، ایران

10.22067/jmme.2023.80165.1092

چکیده

در این پژوهش، خواص کششی ترکیب نانوکامپوزیت پلی پروپیلن/ لاستیک طبیعی تقویت شده با نانوذرات پرلیت تولید شده به کمک دستگاه مخلوط کن داخلی دو محوره، مورد مطالعه قرار گرفت. همچنین، از مدلسازی ریاضی آنالیز واریانس با استفاده از روش سطح پاسخ برای مقایسه و تصدیق نتایج آزمون کشش تجربی استفاده شد. نقش هر یک از متغیر‌های موادی درصد وزنی لاستیک طبیعی و نانوذرات پرلیت بر خصوصیات مکانیکی ترکیبات جدید تولید شده بررسی شد. طبق این بررسی‌ها، مشاهده شد که مقادیر استحکام کششی و تغییر طول تا شکست در اثر افزایش مقدار لاستیک طبیعی از 20 به 40 درصد وزنی و ثابت بودن مقدار نانوذرات پرلیت در 3 درصد وزنی، به ترتیب 68/14 درصد کاهش (از 92/8 تا 61/7 مگاپاسکال) و 72 درصد افزایش (از 05/51 تا 81/87 درصد) یافت. نتایج بدست آمده از بهینه سازی متغیرها نشان داد، در صورت استفاده از 268/3 درصد وزنی از لاستیک طبیعی و 046/4 درصد وزنی از نانوذرات پرلیت، ماکزیمم مقادیر استحکام کششی و تغییر طول تا شکست به ترتیب 332/8 مگاپاسکال و 38/74 درصد حاصل شد. تصاویر میکروسکوپ الکترونی روبشی بیانگر تاثیر مثبت افزودن نانوذرات به فاز پایه به واسطه کوچک شدن اندازه فاز الاستومری و در نتیجه افزایش استحکام کششی ماده بود. همچنین، پخش مناسب نانوذرات در زمینه پلیمری در نمونه ساخته شده با 5 درصد وزنی پرلیت و 30 درصد وزنی لاستیک طبیعی اتفاق افتاد. اما، با افزایش نانوذرات به 9 درصد وزنی، تراکم و کلوخگی نانوذرات پرلیت در فاز ترموپلاستیکی مشاهده شد.

کلیدواژه‌ها

• پلی پروپیلن
• لاستیک طبیعی
• نانوذرات پرلیت
• نانوکامپوزیت
• ریزساختار
• روش پاسخ سطح

موضوعات

• مواد پیشرفته

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عنوان مقاله [English]

Optimization of Mechanical and Morphological Properties of Polypropylene Reinforced with Natural Rubber-Perlite Nanoparticles Using Response Surface Method

نویسندگان [English]

• Hadi Soleymani ¹
• Abdolhosein Fereidoon ¹
• Alireza Albooyeh ²
• Mohammadreza Nakhaee ³

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

² School of engineering, Damghan university, Damghan, Iran

³ Faculty of Mechanics and Energy, Shahid Beheshti University, Tehran, Iran

چکیده [English]

In this research, the tensile properties of polypropylene/natural rubber composite reinforced with perlite nanoparticles were studied. The mathematical modeling of analysis of variance using the surface response method was used to confirm the experimental results. The role of each materials variable and the weight percentage of natural rubber and pearlite nanoparticles on the tensile properties of the nanocomposite samples was investigated. It was observed that the values of tensile strength and elongation at break by increasing the amount of natural rubber from 20 wt.% to 40 wt.% and the constant amount of perlite nanoparticles at 3 wt.%, decreased by 14.68% (from 8.92 to 7.61 MPa) and increased by 72% (from 51.05% to 87.81%), respectively. The results obtained from the parameters optimization showed that the maximum values of tensile strength and elongation at break are 8.332 MPa and 74.38% was obtained in the sample with 3.268 wt.% of natural rubber and 4.046 wt.% of perlite nanoparticles, respectively. The scanning electron microscope images showed the positive effect of adding nanoparticles to the polypropylene/natural rubber composite due to the reduction in the size of the elastomeric phase and as a result, the increase in the tensile strength of the composite samples. Also, the proper dispersion of nanoparticles in the polymer matrix phase occurred in the sample with 5 wt.% of perlite nanoparticles and 30 wt.% of natural rubber. However, with increasing the weight percentages of nanoparticles up to 9 wt.%, some agglomerations of pearlite nanoparticles were observed in the thermoplastic phase.

کلیدواژه‌ها [English]

• Polypropylene
• natural rubber
• pearlite nanoparticles
• nanocomposite
• microstructure
• surface response method

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