uv degradation造句

• UV degradation is one form of polymer degradation that affects plastics exposed to sunlight.
• It is sensitive to UV degradation, however.
• Polymers which possess UV-absorbing groups such as aromatic rings may also be sensitive to UV degradation.
• Oxidation and UV degradation are also frequently linked, mainly because UV radiation creates free radicals by bond breakage.
• Presence of unsaturated bonds makes the adhesive more susceptible to autoxidation and UV degradation and necessitates use of antioxidants and stabilizers.
• These bumpers contained a stabiliser to prevent UV degradation which made them unsuitable for painting because the paint would not adhere properly.
• :I'd go with plastic for the blades ( painted to protect against UV degradation ) and steel for the frame ( painted to prevent rust ).
• Chlorinated isocyanurates, a family of organic chlorine-releasing compounds, are stabilized to prevent UV degradation due to the presence of cyanurate as part of their chemical backbone.
• The ultraviolet component of sunlight degrades and decomposes Kevlar, a problem known as " UV degradation ", and so it is rarely used outdoors without protection against sunlight.
• Because of the vulnerability of polyethylene to UV degradation, sleeving, or sleeved pipe should not be stored in sunlight, although carbon pigments included in the sleeving can provide some limited protection.
• Over time the protective hardcoat breaks down with UV degradation and wear from abrasion, etc . If left untreated the headlights will eventually develop small surface cracks, a condition referred to as crazing.
• Epoxies and chains containing aromatic functionalities are especially susceptible to UV degradation while polyesters are susceptible to degradation by hydrolysis, while polymers containing an CFRP is in contact with an active metal such as aluminium in salt water environments.
• The usage of higher-quality HDI polyurethane resins ensures greater flexural performance for external applications and the resin will not yellow in appearance when exposed to UV light, the HDI presence also provides greater protection from UV degradation.
• The amount of these components affect directly the properties of the fiber, since the hemicellulose is responsible for the moisture absorption, bio-and thermal degradation whereas lignin ensures thermal stability but is responsible for the UV degradation.
• If an insulated slab is to be poured inside the grade beam, then the outer surface of the grade beam and the rubble trench should be insulated with rigid XPS foam board, which must be protected above grade from mechanical and UV degradation.