Demonstration of L-Peak Shape Variation

In order to discuss the shape evolution of the long period distributions, the regions (example white border in Fig. 4.8) of the corresponding peaks are extracted from the CDFs. These regions are collected as a function of s and displayed in Figs. 4.12, 4.13, and 4.14 for discussion. 

For sample TPU 205 Fig4.12 presents the regions of the L-peak in the CDFs as a function of strain. Here and with sample TPU235 (Fig.4.14) the most simple evolution is observed Upon straining the relative asymmetry of the long period distribution increases considerably The many thin soft domains are relatively hard, the thick soft domains are considerably softer. 

We do not discuss this disproportionating in terms of different Young s moduli, because there might as well be a different reason an elastic limit due to full extension of taut tie-molecules that is increasing more or less continuously with increasing soft-layer thickness. Taut tie-molecules may simply block further extension of respective sandwiches. 

So the thin soft domains undergo a low nanoscopic strain, whereas the thick soft domains are easily elongated during the straining experiment. When the plateau 

4 Thermoplastic Polyurethane Elastomers Under Uniaxial Deformation 

---