مطالعه سینتیک تخریب گرمایی کامپوزیت‌های اپوکسی-نانولوله‌های کربنی

نوع مقاله : تالیفی

نویسندگان

1 دانشکده مهندسی شیمی و پلیمر، دانشگاه آزاد اسلامی، واحد تهران جنوب

2 دانشجوی دکتری مهندسی پلیمر، گروه مهندسی پلیمر، دانشگاه آزاد اسلامی واحد تهران جنوب، صندوق پستی:466- 19585

چکیده

رزین­ های اپوکسی به ­علت ساختار شبکه ­ای و مقاومت ضعیف در برابر رشد ترک، معمولا دارای ساختار شکننده است.  بنابراین، افزایش چقرمگی رزین­ های اپوکسی با وجود نانوذرات پلیمری، از زمینه ­های مورد توجه پژوهشگران است. مطالعه تخریب نانوکامپوزیت­ های اپوکسی و مدل­سازی سینتیک تخریب به­ طور گسترده به ابزار اساسی برای مهندسان تبدیل شده است. با این کار می ­توان پایداری گرمایی مواد را پیش از به­ کارگیری در صنعت پیش ­بینی کرد که به کاهش هزینه­ ها و افزایش کیفیت محصول منجر می­ شود. اصلاح سطح نانولوله­ های کربنی و پراکنش نانوذرات دو عامل مهم در پایداری گرمایی نانوکامپوزیت­­ های اپوکسی در مجاورت نانولوله های کربنی است. نمونه هیبرید نانوکامپوزیت اپوکسی در مجاورت نانولوله ­های کربنی چنددیواره و نانوذرات رس نشان داد، وجود هم­زمان نانولوله ­های کربنی و نانوذرات رس می­ تواند به ­عنوان عامل بازدارنده تخریب گرمایی عمل کند و انرژی فعال­سازی  واکنش تخریب را نسبت به نمونه دیگر افزایش دهد. در این مقاله، اثر نانولوله ­های کربنی بر شکل­ شناسی، خواص رئولوژیکی و مکانیکی، تجزیه گرماوزن سنجی، پایداری گرمایی، رزین اپوکسی و مدل­سازی سینتیک تخریب نانوکامپوزیت ­های اپوکسی در مجاورت نانولوله­ های کربنی مرور می­ شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Study of Thermal Degradation Kinetics of Epoxy/Carbon Nanotubes Composites

نویسندگان [English]

  • Mohammadreza Kalaee 1
  • Mohammad Hossein Karami 2
1 Polymer Engineering Group, Faculty of Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran.
2 Department of Polymer Engineering, Faculty Of Engineering, South Tehran Branch, Islamic Azad University, P.O. Box 19585-466, Tehran, Iran.
چکیده [English]

Epoxy resins usually have a brittle structure due to the cross-linked structure and poor resistance to crack growth. Therefore, increasing the toughness of epoxy resins in the presence of polymer nanoparticles is one of the fields of interest for researchers. Studying the degradation of epoxy nanocomposites and modeling the degradation kinetics have become widely used as an essential tool for engineers to predict the thermal stability of materials before using in industry, which leads to reduction in costs and an increase in product quality. Surface modification of carbon nanotubes and dispersion of nanoparticles are two important factors in the thermal stability of epoxy nanocomposites in the presence of carbon nanotubes. Hybrid epoxy nanocomposite in the presence of multi-walled carbon nanotubes and clay nanoparticles showed that the simultaneous presence of these nanoparticles can act as a preventive agent against thermal degradation and increase the activation energy of the degradation reaction. In this article, the effect of carbon nanotubes on morphology, rheological and mechanical properties, thermal gravimetric analysis, thermal stability of epoxy resin, and modeling of degradation kinetics of epoxy nanocomposites in the presence of carbon nanotubes are reviewed.

کلیدواژه‌ها [English]

  • carbon nanotube
  • epoxy resin
  • degradation kinetics
  • modeling
  • thermal gravimetric analysis (TGA)

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