Abstract
The thermal and rheological behaviour of seven random Cl-ended aromatic PES/PEES copolymers ( M n ≈ 9500 g mol −1), at various PES/PEES repeating unit ratios, was studied. The glass transition temperatures ( T g), determined by DSC experiments, showed a dependence on copolymer composition significantly different from the ideal linear behaviour expected on the basis of Fox equation. Degradations were carried out in the scanning mode, under flowing nitrogen, in the temperature range 35–650 °C and a single degradation stage was observed for all copolymers. The initial decomposition temperatures ( T i) and the half decomposition temperatures ( T 1/2) were directly determined by TG curves, while the apparent activation energies of degradation ( E a) were obtained by the Kissinger method. In addition, the complex viscosity ( η ∗) of molten copolymers was determined in experimental conditions of linear viscoelasticity. T i, T 1/2, E a, and η ∗ values were depending on copolymer composition, showing a trend similar to that of T g values. The results obtained were discussed and interpreted.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
