TOPEM DSC study of glass transition region of polyurethane cationomers

In this paper TOPEM DSC method was employed to investigate the glass transition region of fluorinated polyurethane cationomers. Fluorinated polyurethane cationomers have been synthesised in the reaction of MDI with poly(ethylene glycol) (600) and butane1,4-diol or N-methyl- or N-butyldiethanolamine and 2,2,3,3-tetrafluoro-1,4-butanediol. Better rigidity was found for generally amorphous cationomer coats. It was found that introduction of fluorine compound changes thermal behaviour of polyurethane cationomers as well as leads to changes in the slope in activation diagram profiles of glass transition in comparison to polyuretahene cationomer without fluorine compound. Application of TOPEM DSC allows to obtain more information concerning frequency dependence of glass transition region and thermodynamical stability of polyurethane structures.

► TOPEM DSC method was employed to investigate the glass transition (Tg) region of fluorinated polyurethane cationomers.
► Introduction of fluorine compounds significantly changes thermal behaviour of cationomers in the Tg region of hard segments.
► Introduction of fluorine compound leads to changes of the slope in activation diagram of glass transition.