Kinetics and postcure reactions mechanism in PUs achieved with excess of NCO groups

PU Synthesis Route Inherent viscosity [dVg] Hardness, [Sh° A] Stress at 300% strain, [MPa] 

PU Synthesis Route Tensile strength, [MPa] Elongation at break, [%] Residual elongation, [%] 

Therefore while the hydrogen bonding did not necessarily enhance the PUs mechanical properties, it plays an essential role on the improvement of the materials performance as elastomers. Similar conclusions were obtained by us in other works, for materials obtained with the diisocyanate MDI and when using other macrodiols like the polyester PEA or the polyether PTMO [127,327,328]. 

8 Kinetics and postcure reactions mechanism in polyurethane elastomers achieved with excess of NCO groups 

Time stays long enough for those who use it. (Leonardo da Vinci). 

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Kinetics and postcure reactions mechanism in PUs achieved with excess of NCO groups 201 Table 4.30 Influence of thickness on the mechanical properties of a 40 days maturated PU [17]... 

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