کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1466655 | 990069 | 2011 | 7 صفحه PDF | دانلود رایگان |
Low molecular weight (MW) poly(styrene-maleic anhydride) (SMA) copolymers was employed to coat spherical alumina (Al2O3) nanoparticles to facilitate dispersion in a polycarbonate (PC) matrix. Melt compounding was done using a high intensity thermokinetic mixer (K-mixer). The low MW SMA coating produced excellent dispersion of nanoparticles in the PC nanocomposites, resulting in fairly high light transmittance even through 2 mm thick specimens. The addition of 1 wt% well-dispersed nanoparticles improved the impact strength during brittle fracture of the PC/alumina nanocomposites through the formation of multi-level microcrazes induced by the nanoparticles. However, further increasing the alumina nanoparticle content altered the energy dissipation behavior, resulting in less effective reinforcement. Various fracture mechanisms affected by the alumina nanoparticles are presented together with the effect of thermal treatment on the PC/alumina nanocomposites.
Journal: Composites Part A: Applied Science and Manufacturing - Volume 42, Issue 12, December 2011, Pages 1903–1909