释义 |
DictionarySeephotodegradablephotodegradation
photodegradation[¦fōd·ō‚deg·rə′dā·shən] (organic chemistry) Chemical changes resulting from the absorption of light that reduce the useful properties of materials, particularly polymers. The chemical changes can include bond scission (especially of the molecular backbone), color formation, crosslinking, and chemical rearrangements. |