مهندسی ساخت و تولید ایران

مهندسی ساخت و تولید ایران

بررسی خواص مکانیکی نانوکامپوزیت PP/NBR/SiC در حضور سازگارکننده PP-g-MA به منظور بهینه‌سازی مدول الاستیسیته و مقاومت به ضربه

نوع مقاله : مقاله پژوهشی

نویسندگان
صابر مخدومی
محمدرضا نخعی امرودی
دانشکده مهندسی مکانیک و انرژی، دانشگاه شهید بهشتی، تهران، ایران
10.22034/ijme.2025.512467.2066
چکیده
هدف از این تحقیق بررسی اثر اجزای نانوکامپوزیت پلی‌پروپیلن (PP)/ نیتریل بوتادین رابر (NBR)/ نانوذرات کاربید سیلیسیم (SiC) بر رفتار مکانیکی (مدول الاستیسیته و مقاومت به ضربه) در حضور پلی‌پروپیلن گرفت‌شده با مالئیک انیدرید (PP-g-MA)، به عنوان سازگارکننده است. بدین منظور از طرح باکس بنکن (BBD) با سه پارامتر لاستیک NBR (10 تا 30 درصد وزنی)، نانوذرات SiC (1 تا 5 درصد وزنی) و سازگارکننده PP-g-MA (3 تا 15 درصد وزنی) به منظور طراحی آزمایش (15 آزمایش)، جهت تعیین نمونه‌ها بهره برده شد. به منظور ساخت نمونه‌ها نیز از فرایند اختلاط مذاب استفاده گردید. مدول الاستیسیته و مقاومت به ضربه به ترتیب طبق استاندارد D638 و D256 بررسی شد. نتایج حاصل از منحنی و روش سطح پاسخ (RSM) در حالت کلی کاهش مدول الاستیسیته و افزایش مقاومت به ضربه را همراه با افزایش فاز NBR، از 10 تا 30 درصد، نشان می‌دهد؛ افزایش سازگارکننده از 3 تا 15 درصد نیز به‌طور پیوسته مدول الاستیسیته و مقاومت به ضربه را بهبود می‌بخشد؛ همچنین افزایش نانوذرات SiC، از 1 تا 5 درصد، نیز مدول الاستیسیته را افزایش داده و مقاومت به ضربه را بهبود می‌بخشد. بهینه‌سازی خواص مکانیکی منجر به مقادیر 75/273 مگاپاسکال و 01/69 ژول بر متر برای مدول الاستیسیته و مقاومت به ضربه شد که در ترکیب بهینه شامل 62/17 درصد NBR، 15 درصد PP-g-MA و 47/4 درصد SiC حاصل گردید. با توجه به تاثیر ریزساختار بر خواص مکانیکی مواد، از تصاویر میکروسکوپ الکترون روبشی (SEM) برای مطالعه ریزساختار به منظور تایید نتایج استفاده گردید.
کلیدواژه‌ها
پلی‌پروپیلن، آکریلونیتریل بوتادین رابر، کاربید سیلیسیم، نانوکامپوزیت روش سطح پاسخ

عنوان مقاله English

Investigate of the mechanical properties of PP/NBR/SiC nanocomposite in the presence of PP-g-MA compatibilizer for optimizing the modulus of elasticity and impact resistance

نویسندگان English

Saber Makhdoumi
Mohammad Reza Nakhaei
Faculty of Mechanics and Energy Engineering, Shahid Beheshti University, Tehran, Iran
چکیده English

The purpose of this study is to investigate the effect of the components of the polypropylene (PP)/nitrile butadiene rubber (NBR)/silicon carbide (SiC) nanocomposite on the mechanical behavior (modulus of elasticity and impact resistance) in the presence of polypropylene-grafted- maleic anhydride (PP-g-MA) as a compatibilizer. To achieve this, the Box-Behnken Design (BBD) was initially utilized for experiment design and sample selection; The melt blending process was used for sample preparation. Next, a statistical model was developed using the analysis of variance (ANOVA) table based on experimental data, showing a good level of accuracy compared to the actual results. The results obtained from the Response Surface Methodology (RSM) generally show a decrease in the elastic modulus and an increase in impact resistance with the increase of the NBR phase, ranging from 10% to 30% by weight; As the compatibilizer content increases from 3% to 15% by weight, both the elastic modulus and impact resistance continuously improve; Additionally, increasing the SiC nanoparticles from 1% to 5% by weight increases the elastic modulus and improves impact resistance. Optimization of the mechanical properties resulted in values of 273.75 MPa for the elastic modulus and 69.01 J/m for impact resistance. These values were achieved with the optimal composition, which contained 17.62% NBR, 15% PP-g-MA, and 4.47% SiC by weight. Considering the effect of microstructure on the mechanical properties of materials, scanning electron microscopy (SEM) images were used to study the microstructure to confirm the results.

کلیدواژه‌ها English

Polypropylene, Acrylonitrile Butadiene Rubber, Silicon Carbide, Nanocomposite, Response Surface Methodology
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