نانوکامپوزیت های اپوکسی مقاوم در برابر شعله با تخلیه کم و قابلیت هدایت الکتریکی عالی
|کد مقاله||سال انتشار||تعداد صفحات مقاله انگلیسی||ترجمه فارسی|
|144884||2017||30 صفحه PDF||سفارش دهید|
Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Composites Science and Technology, Volume 139, 8 February 2017, Pages 83-89
A highly efficient phenylphosphonate-based flame-retardant epoxy resin (FREP) was firstly prepared from phenylphosphonic dichloride (PPDCl) and allylamine (AA). Functionalized graphite nanoplatelets (fGNPs) fillers were then performed to fabricate the fGNPs/FREP nanocomposites via mixing followed by casting method. The thermally conductive coefficient (Î»), thermal diffusivity (Î±), flame retardancy, electrical conductivities and thermal stabilities of the fGNPs/FREP nanocomposites were all enhanced with the increasing addition of fGNPs fillers. The Î» and Î± value of the fGNPs/FREP nanocomposite with 30Â wt% fGNPs fillers was increased to 1.487Â W/mK and 0.990Â mm2/s, about 7 times and 6 times for that of pure FREP matrix (0.234Â W/mK and 0.170Â mm2/s), respectively. And the corresponding electrical conductivity was also increased to 5.0Â ÃÂ 10â4Â S/cm, far better than that of pure FREP matrix (1.0Â ÃÂ 10â12Â S/cm). In comparison with that of pure FREP, the THR and TSP value of the fGNPs/FREP nanocomposite with 15Â wt% fGNPs fillers was decreased by 37% and 32%, respectively, char yield was increased by 13%, and LOI value was increased from 31% to 37%. However, the peak of heat release rate of the fGNPs/FREP nanocomposite became worse due to its high thermal conductivity. Nanoindentation revealed that there was negligible influence of fGNPs fillers on the hardness values and Young's modulus of the fGNPs/FREP nanocomposites.