Rigid segments of condensation polyetherurethanes
Polimery 2002, No 10, 706
On the basis of the changes of physical properties such as refractive index, dynamic viscosity, pH value (Table 1) and spectrum analysis (IR, 1H NMR and 13C NMR - Figs. 1-5) a probable reaction course (scheme A) and chemical structures of the products formed in the system consisting from urea (here: M), phenylsulfonie acid (K) and formaldehyde (F), have been determined. The products were denoted as MKF111 and MKF112 dependently on the reacting sunstances molar ratios: 1:1:1 and 1:1:2, respectively. The reasons of very limited optimal time of MKF application, guaranting the obtaining of ionomeric polyoxybutyleneurethaneureas (JPURK) with good functional quality, have been explained. There was stated that to obtain JPURK with go od set of properties the presence of free sulfonie groups in MKF is a necessary condition.
Keywords: rigid segments of condensation polyetherurethanes, synthesis, physieal properties, spectrum analysis, structure