کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
821961 | 1469555 | 2009 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effects of dispersion and interfacial modification on the macroscale properties of TiO2 polymer–matrix nanocomposites Effects of dispersion and interfacial modification on the macroscale properties of TiO2 polymer–matrix nanocomposites](/preview/png/821961.png)
This paper quantifies how the quality of dispersion and the quality of the interfacial interaction between TiO2 nanoparticles and host polymer independently affect benchmark properties such as glass transition temperature (Tg), elastic modulus and loss modulus. By examining these composites with differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM), we demonstrate changes in properties depending on the adhesive/wetting or repulsive/dewetting interactions the nanoparticles have with the bulk polymer. We further quantify the dispersion of TiO2 nanoparticles in polymethylmethacrylate (PMMA) matrices by a digital–optical method and correlate those values to the degree of Tg depression compared to neat PMMA. Samples with the same weight percent of nanoparticles but better dispersion show larger shifts in Tg.
Journal: Composites Science and Technology - Volume 69, Issues 11–12, September 2009, Pages 1880–1886