S 200

c w 1000

Figure 5.5. Changes in percent elongation at break of PE film as a function of exposure time.

Figure 5.5. Changes in percent elongation at break of PE film as a function of exposure time.

170-190 kLy/year, humidity, dust, and the like [55]. The same pipes were also exposed in Florida for 2 years. Samples were withdrawn periodically. Changes in exposed pipe samples were monitored in terms of FTIR, differential scanning calorimetry (DSC), and mechanical properties testing. Figure 5.5 shows the change in percent elongation at break with respect to exposure time.

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