Abstract
This chapter discusses the results of weathering exposure of Nylon. It is the common name for high-molecular weight polyamides—semi-crystalline polymers typically produced by the condensation of a diacid and a diamine. Nylons are sensitive to UV radiation. Nylons find applications as engineering plastics as well as fiber materials. During normal use they are often exposed to sunlight, which causes extensive degradation of the polymer. Weatherability will be reduced unless UV stabilizers are incorporated into the formulation. Carbon black is the most commonly used UV stabilizer. Carbon black lowers the ductility and toughness as a trade-off for UV stability. Honeywell offers a UV-stabilized nylon with a synergistic combination of additives—a reactive siloxane, a hindered amine, and a phosphite. This package offers a significant improvement in the UV stabilization of nylon resins. Nylon materials produced with this stabilizer system maintain their appearance upon weathering and are highly useful for a wide variety of structural and decorative articles.
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