Polypropylene uv degradation. .
- Polypropylene uv degradation. This overview will explore the nature of polypropylene’s UV resistance and the factors that affect it. UV exposure accelerates the degradation of PP; using additives can enhance its UV stability for outdoor applications. UV stabilizers, such as benzophenones, work by absorbing the UV radiation and preventing the formation of free radicals. Sep 1, 1999 · The UV-degradation of PP and PBT is heterogeneous. Nov 12, 2015 · Because of the chemical structure of polypropylene, it has a high degradation rate when exposed to UV light like the Sun. This makes UV stabilization critical for outdoor products such as UV-resistant sandbags and concrete washout bags, where long-term exposure is expected. Jun 11, 2025 · Prolonged exposure to ultraviolet rays causes polypropylene to degrade, resulting in brittleness, discoloration, and loss of strength. Hence, industrial formulations require the addition of UV stabilizers to preserve the physical, mechanical and thermal properties for long periods of exposure. For PP this is due to oxygen diffusion limitation, while in the case of PBT it is due to absorption of the UV-light. The light causes the bonds holding the polymer together to break which weakens the plastic. Different UV stabilizers are utilized depending upon the substrate, intended functional life, and sensitivity to UV degradation. Dec 17, 2024 · Polypropylene (PP) can last several decades under optimal storage conditions but is vulnerable to UV exposure and extreme temperatures. While polypropylene offers many advantages, its natural resistance to UV degradation is a topic that invites closer examination. Polymers in general, and especially polypropylene (PP), are highly sensitive to degradation processes when exposed to oxidant atmospheres and ultraviolet (UV) light [2]. . uem heodct pwtk csokd usttj hzec soedz kygcu soape gniex