کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5179759 1502532 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Self-healing thermoplastic-toughened epoxy
ترجمه فارسی عنوان
اپوکسی گرماسنجی خود را بهبود می بخشد
کلمات کلیدی
اپوکسی ترموپلاستیک چسبنده، خود شفا، میکرو کپسول،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی


- Solvent-filled capsules survive a 180 °C cure cycle in a thermoplastic-toughened epoxy.
- The thermoplastic and solvent combination allows simultaneous toughening and healing.
- Fracture toughness and healing performance are stable after 30 days aging (at RT).

A thermoplastic resin poly(bisphenol A-co-epichlorohydrin) (PBAE) is blended with a high glass transition temperature (Tg) epoxy matrix to serve as both a toughening additive and a healing agent in combination with an encapsulated solvent. Microcapsules are coated with poly(dopamine) (PDA) to improve the thermal stability and retain the core solvent during curing at 180 °C. The fracture toughness of the high Tg epoxy (EPON 828: diamino diphenyl sulfone) is doubled by the addition of 20 wt % PBAE alone and tripled by the addition of both microcapsules and the thermoplastic phase. Self-healing is achieved with up to 57% recovery of virgin fracture toughness of the toughened epoxy. Healing performance and fracture toughness of the self-healing system remain stable after aging 30 days. The relative amount of thermoplastic phase and the presence of solvent-filled microcapsules influence the storage modulus, Tg, and healing performance of the polymer.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 74, 15 September 2015, Pages 254-261
نویسندگان
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