Malamalama amata

Malamalama amata

I le faiga photocurable, e aofia ai le kelu UV, ufiufi UV, vaitusi UV, ma isi, suiga kemikolo e tupu pe a uma ona maua pe mitiia le malosi i fafo, ma decompose i radicals saoloto po o cations, ma faaosofia ai le tali polymerization.

Photoinitiators o mea ia e mafai ona maua ai radical free ma amata ai le polymerization e ala i le faʻamalamalamaina.A uma ona faʻamalamalamaina nisi o monomer, latou te mitiia photons ma fausia ai se tulaga faʻaoso M* : M+ HV →M*;

A maeʻa le homolysis o le mole faʻaagaoioia, o le free radical M * → R · + R '· ua faʻatupuina, ona amata ai lea o le polymerization monomer e fausia ai le polymer.

Tekinolosi faʻamalologa faʻasaʻo o se tekonolosi fou Faasao Malosiaga ma le Siosiomaga, lea e faʻafefeina e le malamalama ultraviolet (UV), eletise eletise (EB), moli infrared, malamalama vaʻaia, laser, fluorescence kemisi, ma isi, ma faʻafeiloaʻi atoatoa le "5E" uiga: Lelei, Faʻamalosia, Tamaoaiga, Faʻasao Malosiaga, ma le Siosiomaga. O le mea lea, ua lauiloa o le "Green Technology".

Photoinitiator o se tasi o vaega taua o mea faapipii photocurable, lea e faia se matafaioi taua i le fua faatatau faamalolo.

Pe a irradiated le photoinitiator i le malamalama ultraviolet, e mitiia le malosi o le malamalama ma vaeluaina i ni radicals saoloto malosi se lua, lea e amataina le polymerization filifili o le resin photosensitive ma le diluent malosi, faia le pipii cross-sootai ma solidified. O le photoinitiator ei ai uiga o le vave, puipuiga o le siosiomaga ma le faʻasaoina o le malosi.

O le initiator molecules e mafai ona mitiia le malamalama i le ultraviolet itulagi (250 ~ 400 nm) poʻo le vaʻaia vaʻaia (400 ~ 800 nm). A uma ona mitiia le malosi malamalama tuusao pe le tuusao, o le initiator molecules suiga mai le tulaga eleele i le tulaga fiafia singlet, ona sosoo ai lea ma le tulaga fiafia tolu tolu e ala i intersystem suiga.

A maeʻa ona faʻamalieina le tulaga o le singlet poʻo le tolu tolu e ala i le monomolecular poʻo le bimolecular chemical reaction, o vaega faʻamalosi e mafai ona amataina le polymerization monomer e mafai ona avea ma radical free, cations, anions, ma isi.

E tusa ai ma auala eseese amataina, e mafai ona vaevaeina photoinitiators i free radical polymerization photoinitiator ma cationic photoinitiator, lea o le free radical polymerization photoinitiator e sili ona faʻaaogaina.