The DMA results for material 2 are shown in Figs. 8–10.
Generally, the curves are similar for both materials. Also,
material 2 shows a significant decrease in storage modulus
starting from about 40 C which, together with the peak
in storage modulus, is typical for the glass transition. Just as
for material 1, in the 50 C region a further drop in the
storage modulus appears. This was discussed for material 1
to be caused by melting of crystalline regions. With material
2, the contact with the DMA clamp was lost behind
120 C and this also occurred when the measurements
were repeated. Fig. 9 gives the course of the loss modulus.
As with material 1, a peak in the area 130 to 150 C
appears. The temperature values of the loss modulus peak
are summarized in Table 2.