Folasaga

Antioxidants (poʻo faʻamautu vevela) o mea faʻaopoopo e faʻaaogaina e faʻalavelave pe faʻatuai ai le faʻaleagaina o polymers ona o le okesene poʻo le osone i le siosiomaga. O mea fa'apipi'i sili ona fa'aaogaina i mea polymer. O paluga o le a faʻaleagaina faʻamaʻi vevela pe a uma ona tao i le vevela maualuga pe faʻaalia i le susulu o le la. Fa'ailoga e pei o le matua ma le samasama o le a matua afaina ai foliga vaaia ma le faatinoga o le oloa. Ina ia puipuia pe faʻaitiitia le tupu mai o lenei tulaga, e masani ona faʻaopoopoina antioxidants.

O le fa'aleagaina o le vevela o polymers e mafua mai i le ituaiga filifili fa'ato'aga fa'amata'u fua e fa'atupuina e le hydroperoxide pe a vevela. O le fa'aleagaina o le vevela o polymers e mafai ona fa'alavelaveina e ala i le pu'eina o fa'amalosi fua ma le fa'aleagaina o le hydroperoxide, e pei ona fa'aalia i le ata o lo'o i lalo. Faatasi ai ma i latou, o antioxidants e mafai ona taofia le faʻamaʻiina o loʻo i luga ma o lea e faʻaaogaina lautele ai.

Ituaiga antioxidants

Antioxidantse mafai ona vaevaeina i ni vaega se tolu e tusa ai ma a latou galuega (ie, latou faʻalavelave i le faʻaogaina o vailaʻau faʻamaʻi faʻamaʻi):

filifili fa'amutaina antioxidants: e masani lava ona latou pu'eina pe aveese fa'amalosi fua fua na fa'atupuina e le polymer auto-oxidation;

hydroperoxide decomposing antioxidants: latou fa'ateleina le fa'atupuina o le fa'aleagaina o le hydroperoxides i polymers;

uamea uamea passivating antioxidants: e mafai ona latou fausia chelates mautu ma ion uʻamea leaga, lea passivating le aafiaga catalytic o ion uamea i le auto-oxidation faagasologa o polymers.

I totonu o ituaiga e tolu o antioxidants, o filifili-fa'amuta antioxidants ua ta'ua muamua antioxidants, e masani ona taofia phenols ma amines aromatic lona lua; o isi ituaiga e lua e taʻua o antioxidants ausilali, e aofia ai phosphites ma masima uʻamea dithiocarbamate. Ina ia maua se paʻu mautu e fetaui ma manaʻoga faʻaoga, e masani ona filifilia se tuufaatasiga o le tele o antioxidants.

Fa'aaogāina o antioxidants i pa'u

1. Fa'aoga ile alkyd, polyester, unsaturated polyester
I totonu o vaega ole alkyd o loʻo i ai le suauu, e iai faʻalua faʻalua i tikeri eseese. O fusi fa'alua ta'ito'atasi, fa'amau fa'alua fa'alua, ma fa'amaufa'alua fa'atasi e faigofie ona fa'ama'iina e fai ai peroxyide i le vevela maualuga, ma fa'apogisa ai le lanu, ae mafai e antioxidants ona fa'apalapala hydroperoxides e fa'amalamalama ai le lanu.

2. Faʻaaogaina i le tuʻufaʻatasia o le sui faʻamalolo PU
PU fa'amalologa sui e masani lava ona faasino i le prepolymer o trimethylolpropane (TMP) ma toluene diisocyanate (TDI). A faʻaalia le resini i le vevela ma le malamalama i le taimi o le tuʻufaʻatasiga, o le urethane e pala i amines ma olefins ma motusia le filifili. Afai o le amine e manogi, e faʻamaʻiina e avea ma quinone chromophore.

3. Fa'aoga ile fa'apipi'iina o pa'u pa'u
O se antioxidant fefiloi o le maualuga-efficiency phosphite ma phenolic antioxidants, talafeagai mo le puipuia o paʻu paʻu mai le vevela oxidative degradation i le faagasologa, fofo, vevela ma isi faiga. O talosaga e aofia ai polyester epoxy, poloka isocyanate TGIC, TGIC suitulaga, laina epoxy compounds ma resins acrylic thermosetting.

Nanjing Reborn New Materials e maua ai ituaiga eseese oantioxidantsmo palasitika, faʻapipiʻi, pisinisi paʻu.

Faʻatasi ai ma le faʻafouga ma le alualu i luma o pisinisi faʻapipiʻi, o le taua o antioxidants mo paʻu o le a sili atu ona manino, ma o le avanoa mo le atinaʻe o le a lautele. I le lumanaʻi, o le a atiaʻe le antioxidants i le itu o le maualuga mole mole mole, multifunctionality, maualuga maualuga, fou, compositeness, tali atu ma le puipuia o le siosiomaga lanu meamata. O lenei mea e manaʻomia ai fomaʻi e faia suʻesuʻega loloto mai le masini ma le faʻaogaina o vaega e faʻaauau ai le faʻaleleia atili, faʻatautaia suʻesuʻega loloto i uiga faʻavae o antioxidants, ma faʻalauteleina atili ni antioxidants fou ma lelei e faʻavae i luga o lenei mea, lea o le a i ai se aafiaga loloto i le gaosiga ma le faʻaogaina o pisinisi faʻapipiʻi. Antioxidants mo coatings o le a faʻateleina le faʻaaogaina o latou gafatia tele ma aumaia ai faʻamanuiaga sili tau tamaoaiga ma tekinolosi.