Glass transition activation energy of CdS/PMMA nano-composite and its dependence on composition of CdS nano-particles |
| |
Authors: | D Patidar Sonalika Agrawal N S Saxena |
| |
Institution: | (1) Semi-conductor and Polymer Science Laboratory, 5 & 6, Vigyan Bhawan, Department of Physics, University of Rajasthan, Jaipur, 302055, India |
| |
Abstract: | CdS/PMMA nano-composites at different weight percent of CdS (0, 2, 4, 6, and 8) have been prepared using solution casting
method. The obtained nano-composites are characterized through the transmission electron microscope (TEM). The differential
scanning calorimetry (DSC) measurements have been done on the nano-composites at different heating rates. The peak glass transition
temperature is determined using the DSC thermograms. It is found that the glass transition temperature increases with the
increase of CdS content up to 6 wt% and then decreases for higher weight percent (8). It is explained on the basis of molecular
motion of PMMA, which is restricted when CdS is added into PMMA. An effort is also made to study the activation energy of
glass transition in the case of nano-composites of different weight percent of CdS. Variation of activation energy with CdS
nano-particle concentration has also been theoretically predicted by using an empirical relation. Thermal stability of these
nano-composites has been explained with the help of activation energy in the glassy region. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|