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This chemical directly inhibits the damage caused by the sun’s ultraviolet rays. UV light alters the physical characteristics of polyethylene (PE). It does this by breaking the carbon and hydrogen bonds, creating free radicals, which in turn break the PE into shorter molecules and thus a more brittle polymer. Effectively, UV light creates a higher melt index polyethylene especially on the exposed surface area. This shows up as a reduction in break elongation and impact properties typical of higher melt index PE. The subsequent attachment of oxygen to these broken sites leads to further accelerated degradation and the formation of oxidized species such as carbonyl and carboxyl structures which are often used as analytical indicators of UV degradation. When product testing Tree Scapes’ UV I exterior foliage, we exposed our Ultra Leaf-X foliage to over 2,000 hours of UV light and document zero product degradation.