علوم و فناوری کامپوزیت

بررسی خواص و ریز ساختار پلی وینیل کلراید چقرمه شده با دی اکتیل فتالات/پلی متیل متاکریلات/ نانوگرافن

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجو، مهندسی پلیمر، دانشگاه آزاد اسلامی واحد تهران جنوب، تهران، ایران

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

3 استادیار، مهندسی پلیمر، پژوهشگاه صنعت نفت، تهران، ایران

چکیده

آمیزه‌های چندجزئی بر پایه پلی‌وینیل‌کلراید سخت (UPVC) به عنوان جزء اصلی و پلی‌متیل‌متاکریلات (PMMA) برای چقرمه سازی پلی وینیل کلراید، نانوگرافن (GNP) به عنوان تقویت کننده و دی‌اکتیل‌فتالات (DOP) در نقش نرم کننده با ترکیب درصدهای مختلف (10/90 و 20/80 حاوی phr 0، 5/0، 1 و 2 نانوگرافن) توسط مخلوط‌کن داخلی تهیه شدند. ریزساختار و خواص مکانیکی نانوکامپوزیت‌های تهیه شده با هدف بررسی اثرات متقابل PMMA و GNP بر خواص بستر UPVC بررسی گردید. نتایج بدست آمده از آزمون‌های کشش و ضربه نشان داد که با افزایش درصد نانوگرافن، مدول کششی افزایش و ازدیاد طول تا نقطه پارگی، استحکام کششی و مقاومت ضربه کاهش می یابد. در درصدهای ثابت نانوگرافن، مقاومت ضربه و مدول کششی و نیز درجه پراکنش نانوگرافن در نمونه های حاوی 20% PMMA بالاتر است که به اختلاط بهتر فازها در اثر برهمکنش های مشاهده شده بین نانوگرافن و پلی‌متیل‌متاکریلات در طیف سنجی مادون قرمز و امتزاج پذیری بالاتر دو فاز پلیمری در این ترکیب درصد نسبت داده می شود. همچنین، مشاهده سطح شکست نمونه‌ها توسط میکروسکوپ الکترونی پویشی نشان داد با افزایش درصد نانوگرافن سطح شکست نمونه ها زبرتر بوده و مسیر رشد ترک در حضور نانوگرافن طولانی تر و ناهموارتر می باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation on the Microstructure and Properties of PVC Toughened with DOP/PMMA/Nano-Graphene

نویسندگان [English]

  • Hadis Jalilian 1
  • Ghasem Naderi 2
  • Shirin Shokoohi 3

1 Islamic Azad University, South-Tehran Branch, Tehran, Iran

2 Iran Polymer and Petrochemical Institute, Tehran, Iran

3 Research Institute of Petroleum Industry, Tehran, Iran

چکیده [English]

Nanocomposites samples based on unplasticized polyvinyl chloride (UPVC) containing polymethyl methacrylate (PMMA) as toughener, graphene nano-platelets (GNP) as reinforcement and di-octylphthalate as plasticizer were prepared with different composition ratios (i.e. 80/20 and 90/10 containing 0, 0.5, 1 and 2 phr GNP) using Haake internal mixer. Nanocomposite samples were analyzed using x-ray diffraction and scanning electron microscopy to investigate the mutual interactions between GNP and PMMA. Mechanical properties (Tensile modulus, elongation at break and impact resistance) of the prepared nanocomposites including tensile modulus, elongation at break and impact strength were also measured. Results showed that increasing nanographene platelets content increases tensile modulus where impact strength, tensile strength and elongation at break are decreased. At constant graphene contents, nanocomposites containing 20% PMMA show higher impact strength and tensile modulus. This was attributed to the higher mixing efficiency due to the interactions established between PMMA and GNP observed through FTIR and also higher miscibility of UPVC/PMMA pair besides the PMMA characteristics. Fracture surface of nanocomposites are significantly rough at the presence of nano-graphene which shows the torturous crack growth path.

کلیدواژه‌ها [English]

  • UPVC
  • PMMA
  • Nanographene
  • Nanocomposite
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علوم و فناوری کامپوزیت
دوره 5، شماره 3
آذر 1397
صفحه 451-456
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