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تحلیل تجربی تاثیرحضور همزمان نانوصفحات گرافن و الیاف شیشه بر خواص مکانیکی و حرارتی نانوکامپوزیت‌های پایه پلی‌پروپیلن/EPDM

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد، مهندسی مکانیک، دانشگاه تربیت دبیر شهید رجائی، تهران، ایران

2 دانشیار، مهندسی مکانیک، دانشگاه تربیت دبیر شهید رجائی، تهران، ایران

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

4 دانشجوی دکترا، مهندسی مکانیک، دانشگاه تربیت دبیر شهید رجائی، تهران، ایران

چکیده

در این تحقیق، خواص مکانیکی و حرارتی نانوکامپوزیت‌هایی بر پایه ماتریسی از دو فاز پلیمری پلی‌پروپیلن و اتیلن پروپیلن دی‌ان مونومر (EPDM)، تقویت شده با نانوصفحات گرافن و الیاف شیشه بررسی شده است. ترکیبات شامل 0، 1 و 2 درصد وزنی نانوصفحات گرافن و نیز 10، 20 و 30 درصد وزنی الیاف شیشه و 10 و 15 درصد وزنی EPDM می‌باشند که توسط یک مخلوط کن داخلی تهیه شدند. نمونه‌ها برای انجام آزمون‌های مکانیکی توسط یک دستگاه پرس داغ تهیه شدند. آزمون‌های مکانیکی و آنالیز حرارتی برای تعیین استحکام‌های ضربه، کشش، مدول الاستیسیته و دماهای ذوب و بلورینگی ترکیبات انجام شدند. مشاهده شد که با حضور الیاف شیشه استحکام ضربه 46 درصد افزایش یافته و استحکام کششی نسبت به ترکیب پایه پلی‌پروپیلن/EPDM اندکی افزایش می‌یابد. همچنین حضورمقادیر پایین نانوصفحات گرافن، استحکام ضربه را 16 درصد افزایش می‌دهد. این در حالی است حضور مقادیر بالای این میزان، استحکام ضربه و استحکام کششی را می‌کاهد. افزایش ذرات گرافن به طور کلی مدول الاستیک ترکیبات را 13 درصد افزایش می‌دهد. همچنین افزودن EPDM استحکام ضربه را 18 درصد افزایش داده و بر سایر خواص مکانیکی اثر کاهشی می‌گذارد. نتایج حاصل از آنالیز حرارتی نشان می دهد که حضور نانوصفحات گرافن باعث افزایش دمای بلورینگی پلی‌پروپیلن شده ولی بر دمای ذوب آن تاثیری نداشته است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Experimental analysis of graphene nanoparticles and glass fibers effect on mechanical and thermal properties of polypropylene/EPDM based nanocomposites

نویسندگان [English]

  • Meysam Nouri-Niyaraki 1
  • Faramarz Ashenai Ghasemi 2
  • Ismail Ghasemi 3
  • Sajad Daneshpayeh 4

1 of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

2 1-Faculty of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

3 Materials Science and Engineering, Iran Polymer and Petrochemical Institiute, Tehran, Iran

4 1-Faculty of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

چکیده [English]

In this study, mechanical and thermal properties of a two-phase polymeric matrix composite including polypropylene and EPDM, reinforced with glass fibers and graphene nanoplates is investigated. Compounds were containing 0, 1 and 2 wt.% of graphene nanoplates and 10, 20 and 30 wt.% of glass fibers and 10 and 15 wt.%EPDM, which were prepared by an internal mixer. Samples for mechanical testing were obtained by a hot press machine. Mechanical and thermal tests were performed to determine the impact strength, tensile strength, modulus of elasticity and melting and crystallization temperature of compounds. It was observed that by using of glass fibers, impact strength was increased 46% and tensile strength and elastic modulus were increased slightly compared to the basic ingredients PP / EPDM. By using of up to 1 wt% of graphene nanoplates, impact strength was increased 16%. The more graphene nanoplates used resulted in a decrease in intensile strength. Adding geraghene nanoplates generally increased elastic modulus up to 13%. Also by adding of EPDM, impact strength of the samples was increased 18% but theirother mechanical peorperties were decreased. Graphene nanoplates also slightly increased the crystallization temperature of samples but their melting temperature have not been affected.

کلیدواژه‌ها [English]

  • Graphene
  • Glass fiber
  • Polypropylene
  • EPDM
  • Mechanical properties
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علوم و فناوری کامپوزیت
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شهریور 1397
صفحه 169-176
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