Raws li cov txheej txheem sib txawv ntawm kev nqis tes ua, cov tshuaj antioxidants tuaj yeem faib ua pawg hauv qab no:
1. Lub ntsiab antioxidant
Cov kev tshawb fawb tau pom tias cov txheej txheem ntawm cov khoom puas tsuaj thiab kev laus yog cov tshuaj tiv thaiv kab mob dawb. Cov khoom siv tau ua kom sov thiab txiav kom tsim cov dawb radicals, thiab ua tau raws cov pa oxygen los tsim cov peroxide dawb radicals, uas txuas ntxiv ua rau hydrogen atoms los ntawm cov pob txha polymer kom tsim tau ruaj khov polymer-based hydroperoxides. Lub voj voog rov qab los thiab tawm mus, cov saw loj tuaj, thiab cov lus teb maj mam nthuav dav.
Los ntawm kev muab H atoms lossis hluav taws xob, siv cov tshuaj peroxide dawb radicals, yog li txiav tawm cov saw tshuaj tiv thaiv, hydrogen pub cov tshuaj tiv thaiv kab mob hu ua thawj cov tshuaj tiv thaiv kab mob. Raug thawj cov tshuaj antioxidants suav nrog
a) Cov tshuaj tsw qab amine antioxidants: Nws muaj keeb kwm ntev thiab txwv rau cov khoom tsaus, tshwj xeeb yog qee cov khoom siv roj hmab thiab polyurethane, vim nws yooj yim los tsim cov xim.
b) Hindered phenolic antioxidants: feem ntau siv ntau hom tshuaj tiv thaiv kab mob thawj zaug. Ntau yam khoom paub zoo, xws li 1010, 1076, koom nrog pawg no.
2. Pab tshuaj antioxidants
Ib chav kawm ntawm cov tshuaj tiv thaiv kab mob uas tuaj yeem cuam tshuam nrog hydroperoxides tsim nyob rau saum toj no cov tshuaj tiv thaiv kom decompose lawv rau hauv cov khoom ruaj khov, yog li txiav cov saw tshuaj tiv thaiv, hu ua pab tshuaj antioxidants.
Phosphite yog siv dav tshaj plaws pab tiv thaiv kab mob antioxidant, cov khoom lag luam xws li 168.
Thioether yog lwm hom tshuaj tiv thaiv kab mob antioxidant, cov khoom lag luam xws li DLTDP thiab DSTDP.
3. Antioxidant nrog lub luag haujlwm tseem ceeb thiab pab cuam tib lub sijhawm
Cov tshuaj tiv thaiv kab mob uas tuaj yeem cuam tshuam nrog peroxide radicals thiab tshem tawm hydroperoxides. Ib qho piv txwv raug yog hydroxylamine. Vim yog ob lub luag haujlwm, hom tshuaj antioxidant no muaj txiaj ntsig zoo.
4. Hlau passivator
Hlau passivators tuaj yeem tsim kev sib koom ua ke ruaj khov nrog cov hlau ions, tshwj xeeb tshaj yog tooj liab ions. Hauv cov polymers hauv kev sib cuag nrog cov hlau (xws li cov xov hlau thiab cov xaim), cov tshuab deactivators hlau tuaj yeem txhim kho kev ruaj ntseg ntawm cov polymer.
Kev sib xyaw ntau hom tshuaj tiv thaiv kab mob antioxidants tuaj yeem tsim cov txiaj ntsig sib xyaw. Ntawd yog, tag nrho cov txiaj ntsig ntawm kev siv ua ke ntawm ob lub stabilizers yog siab dua qhov suav ntawm qhov tshwm sim ntawm ob leeg ib leeg. Cov neeg sawv cev tshaj plaws yog kev sib xyaw ntawm cov tshuaj phenol thiab phosphite antioxidant.