کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
5021164 1469356 2017 33 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Cryogenic fracture behavior of epoxy reinforced by a novel graphene oxide/poly(p-phenylenediamine) hybrid
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موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Cryogenic fracture behavior of epoxy reinforced by a novel graphene oxide/poly(p-phenylenediamine) hybrid
چکیده انگلیسی
Epoxy polymers are actively used in high-end technological applications. However, a major drawback of epoxies is their brittle mechanical behavior especially at cryogenic temperatures. Here we report a novel filler (GO-PDA) of poly (p-phenylenediamine) (PDA) nano-sized particles attached to graphene oxide (GO) sheets. Chemical analysis showed the attachment of PDA particles to GO through amidation of carboxylic groups. Transmission electron microscopy showed that PDA particles are uniform and spherical of ≈70 nm in size. Selected area electron diffraction showed that these particles are crystalline. Mechanical properties of epoxy/GO-PDA composite are tested at 25 °C (RT) and −120 °C (CR) temperatures. Young's modulus was not remarkably affected by GO-PDA addition. However, strength, fracture strain and toughness showed improvement at relatively low GO-PDA wt%. Microstructural analysis of fractured surfaces showed that the fracture mechanism is dependent on testing temperature. GO-PDA has a very good strengthening and toughening effects for epoxy without compromising the modulus both at RT and CR.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part B: Engineering - Volume 129, 15 November 2017, Pages 133-142
نویسندگان
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