Thermodynamics of deformation of segmented polyurethaneureas

In this paper we develop a new approach to the thermodynamic analysis of structural rearrangements accompanying uniaxial stretching of segmented polyurethaneureas (PEUU) based on oligotetramethylene glycole with a molecular weight of about 1 kg/mol (TMG/1); 2.4-toluene diisocyanate (TDI); 4.4' -diphenylmethane diisocyanate (DPH) and triethylene glycole (TEG), of the following compositions: PEUU-1 [TMG/1-(TDI-DPH-TDI)]X PEUU-2 [(TMG/1-TDI)4-TMG/1-(TDI-DPH)5TDI]y PEUU-3 [(TMG/1-TDI)5-DPH-TDI-(TEG-TDIDPH-TDI)4]Z.