علوم و فناوری کامپوزیت

علوم و فناوری کامپوزیت

تهیه رزین دمابالای بیس‌مالئیمید چقرمه بر پایه رزین اپوکسی DGEBA و بررسی خواص کامپوزیت آن با الیاف شیشه

نوع مقاله : مقاله پژوهشی

نویسندگان
1 استادیار، شیمی پلیمر، پژوهشکده مهندسی کامپوزیت، دانشگاه صنعتی مالک اشتر، تهران.
2 دانشجوی کارشناسی ارشد، مهندسی پلیمر، پژوهشکده مهندسی کامپوزیت، دانشگاه صنعتی مالک اشتر، تهران.
3 دانشیار، مهندسی پلیمر، پژوهشکده مهندسی کامپوزیت، دانشگاه صنعتی مالک اشتر، تهران.
چکیده
در این پژوهش، به‌منظور بهبود خواص مکانیکی و حرارتی رزین اپوکسی و همچنین رفع شکنندگی ذاتی بیس‌مالئیمید، رزین بیس‌مالئیمید جدیدی بر پایه رزین اپوکسی طراحی و سنتز شد. بدین منظور، دو پیش‌ماده مالئیمیدی شامل -4هیدروکسی فنیل مالئیمید (HPM) و 4-کربوکسی فنیل مالئیمید (CPM) به ترتیب از واکنش مالئیک انیدرید با -4آمینو فنول و -4آمینو بنزوئیک اسید در حضور عوامل آب‌گیر مناسب تهیه و سپس با رزین اپوکسی دی گلیسیدیل اتر بیس‌فنول A DGEBA)) وارد واکنش شدند و رزین بیس مالئیمید سنتز شد. بر اساس آزمون‌های DSC و FT-IR چرخه پخت رزین سنتز شده تعیین شد. نتایج آزمون TGA نشان داد که رزین بیس مالئیمید سنتز شده پایداری حرارتی بالاتری نسبت به رزین اپوکسی خالص دارد. آزمون ILSS بر روی کامپوزیت‌های تهیه‌ شده با الیاف شیشه، مقادیر 44.03 MPa و 46.40 MPa در دمای 78 °C را به ترتیب برای بیس مالئیمید سنتز شده از HPM و CPM نشان داد. همچنین مقادیر ILSS برای این کامپوزیتها در دمای محیط به ترتیب برابر 50.10 MPa و 52.65 MPa به دست آمد که حاکی از افزایش استحکام برشی بین‌لایه‌ای و بهبود چقرمگی نمونه‌ها در مقایسه با رزین اپوکسی خالص می‌باشد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Preparation of toughened high temperature bismaleimide resin based on DGEBA epoxy resin and investigation of its composite properties with glass fibers

نویسندگان English

Hassan Fattahi 1
ُSara Jalilolghadr 2
Mohammad Reza Ehsani 2
Mehrzad Mortezaei 3
1 Department of Polymer Engineering, Composite Research Institute, Malek Ashtar University of Technology, Tehran, Iran.
2 Department of Polymer Engineering, Composite Research Institute, Malek Ashtar University of Technology, Tehran, Iran.
3 Department of Polymer Engineering, Composite Research Institute, Malek Ashtar University of Technology, Tehran, Iran.
چکیده English

In this study, a new bismaleimide resin was designed and synthesized based on epoxy resin to improve the mechanical and thermal properties of epoxy resin and to overcome the inherent brittleness of bismaleimide. For this aim, two maleimide precursors including 4-hydroxyphenyl maleimide (HPM) and 4-carboxyphenyl maleimide (CPM) were synthesized through the reaction of maleic anhydride with 4-aminophenol and 4-aminobenzoic acid, respectively, in the presence of suitable dehydrating agents. These intermediates were then reacted with diglycidyl ether bisphenol A (DGEBA) epoxy resin. Through DSC and FT-IR analyses, the curing cycle of synthesized bismaleimide resin was determined. TGA results indicated the higher thermal stability of the synthesized bismaleimide resin compared to neat epoxy resin. ILSS of the composites prepared by glass fibers showed 44.03 MPa and 46.40 MPa at 78 °C for bismaleimides synthesized from HPM and CPM, respectively. Moreover, the ILSS of the prepared composites at room temperatures were determined 50.10 MPa and 52.65 MPa, respectively, indicating an improvement in both interlaminar shear strength and toughness compared to neat epoxy resin.

کلیدواژه‌ها English

Bismaleimide
Epoxy
High temperature resin
Glass fibers composite
Thermal curing
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