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  2. Photo-oxidation of polymers - Wikipedia

    en.wikipedia.org/wiki/Photo-oxidation_of_polymers

    Depending upon substitution, the UV absorption spectrum is changed to match the application. Concentrations normally range from 0.05% to 2%, with some applications up to 5%. Frequently, glass can be a better alternative to polymers when it comes to UV degradation. Most of the commonly used glass types are highly resistant to UV radiation ...

  3. Polypropylene - Wikipedia

    en.wikipedia.org/wiki/Polypropylene

    Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene . Polypropylene belongs to the group of polyolefins and is partially crystalline and non-polar .

  4. Photodegradation - Wikipedia

    en.wikipedia.org/wiki/Photodegradation

    Discolouration of the rope may also occur, thus giving an early warning of the problem. Polymers which possess UV-absorbing groups such as aromatic rings may also be sensitive to UV degradation. Aramid fibres like Kevlar , for example, are highly UV-sensitive and must be protected from the deleterious effects of sunlight.

  5. Olefin fiber - Wikipedia

    en.wikipedia.org/wiki/Olefin_fiber

    Olefin fiber is a synthetic fiber made from a polyolefin, such as polypropylene or polyethylene.It is used in wallpaper, carpeting, [1] ropes, and vehicle interiors. Olefin's advantages are its strength, colorfastness and comfort, its resistance to staining, mildew, abrasion, and sunlight, and its good bulk and cover.

  6. Ultraviolet - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet

    UV damaged polypropylene rope (left) and new rope (right) UV degradation is one form of polymer degradation that affects plastics exposed to sunlight. The problem appears as discoloration or fading, cracking, loss of strength or disintegration. The effects of attack increase with exposure time and sunlight intensity.

  7. Weather testing of polymers - Wikipedia

    en.wikipedia.org/wiki/Weather_testing_of_polymers

    Polypropylene, a common material in our everyday environment, is a very significant example of this approach. Its chemical structure where many tertiary carbons are present (bound to three carbon atoms and only one hydrogen) makes it a particularly sensitive material to ageing.

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