Study of Factors Affecting UV-Induced Photo-Degradation in Different Types of Polyethylene Sheets.

As shown in Figure 2 f, the CIs in sliced samples exhibited a decreasing trend that was inversely related to the distance to the UV-irradiated upper face, as reflected by the CI back and CI face values detected in Slice-0.8 and Slice-0.4.

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For the foamed LDPE sheet (LDPE-0.8-Foamed), the Xc value also displayed an increasing trend in the progress of photo-degradation ( Table 5 ).

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