The polyurethane blends' thermal degradation kinetics
E. Govorčin Bajsić1, V. Filipan2
1 University of Zagreb Faculty of Chemical Engineering and Tehnology,
2 Faculty of Chemical Engineering & Technology
Abstract
The effect of UV irradiation on the thermal properties and kinetic parameters of specific polymer blends was studied. The raw materials were synthesized and the blends of PU elastomers and polycarbonate (PC) with different weight ratios (100/0, 70/30, 30/70 and 0/100) were prepared using a Brabender mixer. Irradiation of the PU/PC blends was carried out using an ultraviolet chamber SUNTEST (λ= 290 nm). Different PU/PC blends were irradiated for 100 h and for 200 h. Thermogravimetric analysis (TGA) was performed in order to determine the influence of UV irradiation. Specific results of experiments are shown in diagrams and tables. The activation energy as a important kinetic parameter was calculated from the experimental data using the Freeman-Carroll kinetic model. The higher values of T5 indicate a higher thermal stability of UV-exposed PU/PC blends on the beginning of degradation, which may be due to the formation of the crosslinking structure on which to designate higher residue. However, the UV exposed blends degraded more easily than the unexposed blends.
Full paper
Session
Reaction Engineering and Catalysis (Lecture)
Reference
Govorčin Bajsić, E.; Filipan, V.: The polyurethane blends' thermal degradation kinetics. Editor: Markoš, J., In Proceedings of the 43rd International Conference of Slovak Society of Chemical Engineering, Tatranské Matliare, Slovakia, May 23 - 27, 678–687, 2016.
BibTeX
| @inProceedings{ssche2016-088, | ||
| author | = { | Govorčin Bajsić, E. and Filipan, V.}, |
| title | = { | The polyurethane blends' thermal degradation kinetics}, |
| booktitle | = { | Proceedings of the 43rd International Conference of Slovak Society of Chemical Engineering}, |
| year | = { | 2016}, |
| pages | = { | 678-687}, |
| editor | = { | Markoš, J.}, |
| address | = { | Tatranské Matliare, Slovakia}} |