Relations between Glass Transition Temperatures in Miscible Polymer Blends and Composition: From Volume to Mass Fractions |
| |
| Authors: | Sylvie Pimbert Laurence Avignon-Poquillon Guy Levesque |
| |
| Institution: | Laboratoire Polymères, Propriétés aux Interfaces et Composites (L2PIC), Université de Bretagne-Sud, Centre de Recherche, rue de St Maudé, 56325 Lorient, France |
| |
| Abstract: | The use of volume fractions in the empirical mixing laws to predict the glass transition temperatures (Tg) of polymer blends provides good agreement with experimental values, even for polymer systems with different densities. No adjustment parameter is therefore required whereas Gordon-Taylor and Kwei equations based on weight fractions need the use of a fitting parameter which has to be determined from experimental data. This assumption was validated from Tg measurements through DSC experiments conducted on PMMA /PVDF blends which have significantly different densities. |
| |
| Keywords: | empirical relations glass transition polymer blends |
|
|
