مطالعه سینتیک پخت و پایداری گرمایی نانو کامپوزیت های اپوکسی در حضور نانو ذرات سیلیکا

نوع مقاله : مقاله مروری

نویسندگان

گروه مهندسی پلیمر، مجتمع فنی و مهندسی، مرکز تحقیقات نانو، دانشگاه آزاد اسلامی واحد تهران جنوب

10.22034/irm.2022.145112

چکیده

رزین اپوکسی به عنوان پوشش ، چسب و ماده زمینه برای کامپوزیتها استفاده می شود و در صنایع اتومبیل، الکترونیک، و ساختمانی کاربرد فراوانی دارد و در ساخت توربین بادی استفاده می شود. اصلاح سطح نانو کامپوزیت های اپوکسی درحضور نانو ذرات سیلیکا، به علت افزایش چسبندگی و پیوند کووالانسی، باعث افزایش استحکام ضربه می شود و همچنین با افزودن نانو ذرات سیلیکا به رزین اپوکسی، مدول یانگ به صورت خطی افزایش می یابد که به دلیل افزایش پراکنش نانو ذرات و کاهش تمرکز تنش می باشد. با افزودن نانو ذرات سیلیکا به رزین اپوکسی دمای بیشینه جریان گرمایی کاهش و سرعت پخت افزایش می یابد و همچنین باعث پهن تر شدن منحنی جریان گرمایی نانو کامپوزیت اپوکسی می شود. حضور نانو ذرات سیلیکا، انرژی اکتیواسیون را کاهش می دهد و نانو ذرات سیلیکا نقش کاتالیزور در واکنش پخت با رزین اپوکسی را دارد. دو عامل مهم درکاهش تخریب حرارتی نانو کامپوزیت های اپوکسی، پراکنش مناسب نانو ذرات و عدم کلوخه ای شدن می باشد. نانو ذرات سیلیکا باعث افزایش دمای بیشینه تخریب گرمایی ، پایداری گرمایی و درصد ذغال باقیمانده می شود. در این پژوهش به بررسی سینتیک پخت نانو کامپوزیت های اپوکسی، ریخت شناسی، خواص رئولوژیکی و مکانیکی، انرژی اکتیواسیون، درجه پخت ،جریان گرمایی و پایداری گرمایی پرداخته شده است.

کلیدواژه‌ها

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صنعت لاستیک ایران
دوره 26، شماره 104
اسفند 1400
صفحه 37-50

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  • تاریخ دریافت: 08 مرداد 1400
  • تاریخ بازنگری: 18 مرداد 1400
  • تاریخ پذیرش: 20 مرداد 1400

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