علوم و فناوری کامپوزیت

علوم و فناوری کامپوزیت

مدلسازی و بررسی تجربی اثر نانوذرات کاربید سیلیسیم (SiC) بر خواص مکانیکی و ریزساختار ترکیب ترموپلاستیک الاستومر بر پایه PP/SBR

نوع مقاله : مقاله پژوهشی

نویسندگان
محسن حاجی بیگی 1
عباس رهی 2
محمدرضا نخعی 3
قاسم نادری 4
1 فارغ التحصیل دکترا، دانشکده مهندسی مکا نیک و انرژی ، دانشگاه شهید بهشتی ، تهران.
2 دانشیار ، دانشکده مهندسی مکانیک و انرژی ، دانشگاه شهید بهشتی ، تهرا ن.
3 استادیار ، دانشکده مهندسی مکا نیک و انرژی ، دانشگاه شهید بهشتی ، تهرا ن.
4 استاد، مهندسی پلیمر ، پژوهشگاه پلیمر و پتروشیمی ایران ، تهران.
10.22068/jstc.2026.2089204.1956
چکیده
در این مقاله، اثر نانوذرات کاربید سیلیسیم (SiC) بر خواص مکانیکی ترموپلاستیک الاستومر بر پایه پلی‌پروپیلن (PP) و لاستیک استایرن بوتادی‌ان (SBR) به روش سطح پاسخ (RSM) بررسی شده و جهت ساخت همه ترکیبات از مخلوط‌کن داخلی و روش مخلوط ذوبی استفاده شده است. طرح مرکب مرکزی (CCD) در RSM به‌عنوان یکی از بهترین روش‌های طراحی آزمایش‌ها، جهت مشخص‌شدن میزان اثر مقادیر مختلف لاستیک و نانوذرات SiC به‌عنوان متغیر ورودی استفاده شده است. محدوده متغیرها در بازه SBR (5 تا 25) و SiC (0 تا 6) درصد وزنی، در پنج سطح در نظر گرفته و مدل‌های پیش‌بینی، برای محاسبه توابع مطلوبیت بکار گرفته شده است. خواص مکانیکی ترکیبات منتخب به‌همراه تصاویر میکروسکوپ الکترونی روبشی (SEM) از ریزساختار آنها به‌طور مقایسه‌ای ارزیابی شده است. طبق نتایج به‌دست‌آمده، مشخص شد که مقدار نانوذرات SiC، دارای نقش اصلی در خواص مکانیکی و ریزساختار ترکیبات نانوکامپوزیت است. همچنین، مقادیر بهینه متغیرهای SBR و نانوذرات SiC، به‌ترتیب، 17.5 و 0.9 درصد وزنی محاسبه شد. بعلاوه، براساس نتایج تحلیل دینامیکی، مکانیکی و حرارتی (DMTA)، ترکیب R15N3، در محدوده دمایی ºC -15 تا ºC 30 (یعنی، دمای محیط)، دارای بالاترین ضریب میرایی در بین همه ترکیبات است و بعد از آن، ترکیب R25N3 در جایگاه دوم قرار دارد.
کلیدواژه‌ها
نانوکامپوزیت‌های PP/SBR/SiC
روش RSM
طرح CCD
بهینه‌سازی خواص مکانیکی
تحلیل DMTA
موضوعات

عنوان مقاله English

Modeling and experimental investigation of the effect of silicon carbide (SiC) nanoparticles on the mechanical and microstructural properties of thermoplastic elastomer based on PP/SBR

نویسندگان English

Mohsen Hajibeigi 1
Abbas Rahi 2
Mohammad Reza Nakhaei 3
Ghasem Naderi 4
1 Faculty of Mechanics and Energy, Shahid Beheshti University, Tehran, Iran.
2 Faculty of Mechanics and Energy, Shahid Beheshti University, Tehran, Iran.
3 Faculty of Mechanics and Energy, Shahid Beheshti University, Tehran, Iran.
4 Faculty of Processing, Iran Polymer and Petrochemical Institute, Tehran, Iran.
چکیده English

In this paper, the effect of silicon carbide (SiC) nanoparticles on mechanical properties of thermoplastic elastomer based on polypropylene (PP) and styrene–butadiene rubber (SBR) using the response surface methodology (RSM) was investigated. Internal mixer with melt blending method was used to produce all compounds. Central composite design (CCD) in RSM as a one of the best design of experiments methods was used to quantify the effect of different amounts of SBR and SiC nanoparticles as input variables. Five levels were selected for the range of the variables as follows: SBR (5-25 wt%), and SiC (0-6 wt%). Prediction models were used to compute the desirability functions. The mechanical properties of selected compounds along with scanning electron microscopy (SEM) images of their microstructure were analyzed comparatively. According to attained results, it was found that the SiC content had the main role in mechanical properties and morphology of the nanocomposite. Also, optimal contents of variables were computed to be 17.5 and 0.9 wt% for SBR and SiC nanoparticles, respectively. Moreover, according to dynamical, mechanical and thermal analysis (DMTA) results, the R15N3 compound, has the highest damping ratio between all compounds in the temperature range of -15 to 30 ºC (i.e., room temperature) and the R25N3 compound is in second order after that.

کلیدواژه‌ها English

PP/SBR/SiC nanocomposite
RSM method
CCD approach
Mechanical properties optimization
DMTA analysis
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علوم و فناوری کامپوزیت
دوره 12، شماره 4
زمستان 1404
صفحه 2925-2939