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仿真植物防紫外线的原理!

  紫外线吸收剂是一种光稳定剂,能吸收阳光及荧光光源中的紫外线部分,而本身又不发生变化。塑料和其他高分子材料在日光和荧光下,因紫外线的作用,产生自动氧化反应,导致聚合物的降解而劣化,使外观及机械性能变坏。加入紫外线吸收剂后可选择性地吸收这种高能量的紫外线,使之变成无害的能量而释放或消耗。
  UV absorber is a kind of light stabilizer, which can absorb the ultraviolet part of sunlight and fluorescent light source, but does not change itself. Under sunlight and fluorescence, plastics and other polymer materials will have automatic oxidation reaction due to the action of ultraviolet, which will lead to degradation of polymers and deterioration of appearance and mechanical properties. After adding UV absorbers, this kind of high-energy UV can be selectively absorbed, which can be released or consumed as harmless energy.
  紫外线吸收剂大多是含有苯环之芳香族化合物.可吸收紫外线.吸收剂因苯环的共振作用吸收紫外线的能量.并转换成热能或无破坏作用的光能放出.之后回复成原来的分子构造.如此可以反覆使用此吸收剂.并不会损害到吸收剂本身.为一种化学性的抗紫外线原理.仿真植物
  Ultraviolet absorbers are mostly aromatic compounds containing benzene ring. They can absorb ultraviolet rays. The absorbers absorb the energy of ultraviolet rays due to the resonance of benzene ring, and convert it into heat energy or non-destructive light energy to release. After that, they return to the original molecular structure. In this way, the absorbers can be used repeatedly without damaging the absorbers themselves. It is a chemical anti ultraviolet principle. Simulation plant
济南假山制作
  聚合物的种类不同,使其劣化的紫外线波长也不相同,不同的紫外线吸收剂可吸收不同波长的紫外线,使用时,应根据聚合物的种类选择紫外线吸收剂。
  Different kinds of polymers lead to different UV wavelengths of degradation. Different UV absorbers can absorb different UV wavelengths. When using, UV absorbers should be selected according to the types of polymers.
  紫外线吸收剂应该具备以下条件:①可强烈地吸收紫外线(尤其是波长为290-400nm);②热稳定性好,即使在加工中也不会因热而变化,热挥发性小;③化学稳定性好,不与制品中材料组分发生不利反应;④混溶性好,可均匀地分散在材料中,不喷霜,不渗出;⑤吸收剂本身的光化学稳定性好,不分解,不变色;⑥无色、无毒、无臭;⑦耐浸洗
  UV absorbers should have the following conditions: ① strong absorption of UV (especially the wavelength of 290-400nm); ② good thermal stability, which will not change due to heat even in the processing, with small thermal volatility; ③ good chemical stability, which will not react unfavorably with the material components in the products; ④ good miscibility, which can be evenly dispersed in the materials, without frost spraying and seepage; ⑤ absorption The collector itself has good photochemical stability, does not decompose, does not change color; ⑥ colorless, non-toxic, odorless; ⑦ immersion resistance
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