| Autor: |
M. Penco, G. Spagnoli, S. Della Sciucca, F. Samperi, R. Mendichi, Alberto D’Amore, Domenico Acierno, Luigi Grassia |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings. |
| ISSN: |
0094-243X |
| DOI: |
10.1063/1.2989037 |
| Popis: |
The structural relaxation of PMMA copolymers with different chain flexibility has been studied by DSC with two classical procedures, namely: the rate of cooling and the isothermal approaches. The apparent activation energy of enthalpy relaxation was evaluated from the dependence of the glass transition temperature on the cooling rate while a comparison of the apparent relaxation rates was appraised from the enthalpy loss by annealing the different samples at the same level of undercooling (Ta = Tg−18 °C). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
