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Abstract
Abstract The effect of phosphorylated poly(2,6-dimethyl-l,4-phenylene oxide) (PPOP) on the stability of high-density polyethylene (HDPE) is described. One and 5% (w/w) of PPOP was melt blended with HDPE (Samples A1 and A5, respectively). The samples were extruded in ribbon form and irradiated with UV light for several hours. In the presence of PPOP, suppression of double bond formation in HDPE was indicated by IR spectroscopy. HDPE became very brittle after 2 5 h irradiation, while Samples A1 and A5 showed much better retention of mechanical properties. The limiting oxygen index of HDPE did not change by incorporation of PPOP. The effect of thermal aging at 100°C on the mechanical properties of HDPE and Samples A1 and A5was also studied.
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