Diacrylate compounds derived from α-pinene and limonene (TDAs: TDA-1 and TDA-2) were photocured with methacryl-substituted polysilsesquioxane (ME-PSQ) prepared from 3-(trimethoxysilyl)propyl methacrylate and tetramethylammonium hydroxide (TMAOH) in the TDA/ME-PSQ weight ratio of 20 : 0, 20 : 1, 20 : 2, 20 : 3, and 20 : 4. All the photocured TDA/ME-PSQ hybrid nanocomposites became transparent. The thermomechanical analysis of the cured TDA/ME-PSQ revealed that the glass transition temperature (Tg) increased, the thermal expansion coefficient above Tg decreased with increasing ME-PSQ content, and that the TDA-1/ME-PSQ had ca. 30°C greater Tg than the TDA-2/ME-PSQ with the same ME-PSQ content. Also, the dynamic mechanical analysis revealed that the TDA-1/ME-PSQ had much greater storage modulus at around 150°C than the corresponding TDA-2/ME-PSQ. The flexural strength and modulus of the TDA/ME-PSQ nanocomposites at 20°C had maximum at ME-PSQ content 4.8 and 13.0 wt %, respectively. As a whole, the thermal and mechanical properties of the nanocomposites were improved by the addition of ME-PSQ, and those of TDA-1/ME-PSQ nanocomposites were superior to those of TDA-2/ME-PSQ. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
If you can't find a tool you're looking for, please click the link at the top of the page to "Go to old article view". Alternatively, view our Knowledge Base articles for additional help. Your feedback is important to us, so please let us know if you have comments or ideas for improvement.