Premium
Conformational aspects of segmented poly(ester‐urethanes)
Author(s) -
Ioan S.,
Cojocaru I.E.,
Grigoras V.C.,
Macocinschi D.,
Filip D.
Publication year - 2003
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200351216
Subject(s) - adipate , differential scanning calorimetry , polyurethane , diethylene glycol , viscometer , ethylene glycol , polymer chemistry , materials science , formamide , benzidine , chemistry , organic chemistry , composite material , viscosity , thermodynamics , physics
Segmented poly(ester‐urethanes) containing hard and soft segments, were obtained from aromatic diisocyanates with thiodiglycol or diethylene glycol as chain extenders, and poly(ethylene glycol)adipate usig a multistep polyaddition process. Transition temperatures by differential scanning calorimetry and thermo‐optical analysis were employed to characterize polyurethane materials. Changes in the conformation of these polyurethanes were analyzed also, by viscometer measurements in N,N‐dimethyl‐formamide. The obtained data revealed that the thermal curves are influenced by the soft and hard segment structures in the temperature range studied.