01699nam a2200253Ia 4500 MX-MdCICY 20260521091211.0 CICY B-10385 Phase Separation and Phase Inversion of Polyurethane Networks Journal of Polymer Research, 3(3), p.159-163, 1996 A series of polyurethane networks were prepared from MDI (4,4'-diphenylmethane diisocyanate), ethylene glycol and a polyoxyethylene-tipped polyoxypropylene triol. The phase separation and phase inversion phenomena of these polyurethane networks were investigated by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA)and measurement of their tensile properties. The DSC and DMA data indicate that the segmented copolyurethanes possess a two-phase morphology comprising soft and hard segments. It can be found from DSC data that the polyether soft segments exhibit a Tg (glass transition temperature)Of -60 °C, and the aromatic hard segments display a Tg of about 128 °C. Two Tgs corresponding to the comprised segments can also be found by DMA for some segmented polyurethanes. Varying the content of aromatic hard segments over the range from 0 to 80 wt POLYURETHANE NETWORKS PHASE SEPARATION PHASE INVERSION THERMAL PROPERTIES MECHANICAL PROPERTIES Lee D.K. Tsai, H.B. Standford, J.L. https://drive.google.com/file/d/1Rz1qUtIDgrp6_nBRgCLBGUc8xZfzoOdt/view?usp=drivesdk Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx Loc REF1 250602s9999 xx |||||s2 |||| ||und|d 20561 20561 0 0 Loc 0 0 F1 CICY CICY RE 2025-06-25 0 B-10385 2025-06-25 14:06:30 2025-06-25 REF1