Photodegradation of UHMWPE Compounded with Annatto and Beetroot Extracts

Figure 9

Fracture surface of tensile specimens after stress strain test: (a) UHMWPE with annatto after 42 days of UV exposure, (b) neat UHMWPE after 42 days of UV exposure, (c) UHMWPE with beet after the same time of UV exposure, and (d) UHMWPE with annatto after 21 days of UV exposure.

(a)

(b)

(c)

(d)