Intangiriro

Antioxydants (cyangwa stabilisateur yubushyuhe) ninyongera zikoreshwa mukubuza cyangwa gutinza iyangirika rya polymers bitewe na ogisijeni cyangwa ozone mu kirere. Nibintu byongerwaho cyane mubikoresho bya polymer. Ipitingi izangirika ya okiside yumuriro nyuma yo gutekwa mubushyuhe bwinshi cyangwa izuba. Fenomena nko gusaza no kumuhondo bizagira ingaruka zikomeye kumiterere no mubikorwa byibicuruzwa. Mu rwego rwo gukumira cyangwa kugabanya ibibaho byiyi nzira, antioxydants yongeyeho.

Kwangirika kwa Thermal oxyde ya polymers biterwa ahanini nubwoko bwumunyururu wubusa bwatangijwe na radicals yubusa itangwa na hydroperoxide iyo ishyushye. Kwangirika kwa Thermal oxyde ya polymers birashobora guhagarikwa no gufata radical yubusa no kubora hydroperoxide, nkuko bigaragara ku gishushanyo gikurikira. Muri byo, antioxydants irashobora kubuza okiside yavuzwe haruguru bityo ikoreshwa cyane.

Ubwoko bwa antioxydants

Antioxydantsirashobora kugabanywamo ibyiciro bitatu ukurikije imikorere yabyo (nukuvuga, uruhare rwabo mubikorwa bya chimique auto-okiside):

urunigi rusoza antioxydants: ifata cyane cyangwa ikuraho radicals yubusa ikorwa na polymer auto-okiside;

hydroperoxide ibora antioxydants: iteza imbere cyane kwangirika kudasanzwe kwa hydroperoxide muri polymers;

ion ion passivating antioxydants: irashobora gukora chelate ihamye hamwe nicyuma cyangiza, bityo bigahindura ingaruka za catalitiki ya ioni yicyuma kuri auto-okiside ya polymers.

Mu bwoko butatu bwa antioxydants, antioxydants irangiza urunigi bita antioxydants yibanze, cyane cyane ibangamira fenoline na amine ya kabiri ya aromatic; ubundi bwoko bubiri bwitwa antioxydants ifasha, harimo fosifite hamwe nu munyu wa dithiocarbamate. Kugirango ubone igifuniko gihamye cyujuje ibyasabwe, hatoranijwe guhuza antioxydants nyinshi.

Gukoresha antioxydants mu gutwikira

1. Ikoreshwa muri alkyd, polyester, polyester idahagije
Mu mavuta arimo ibice bya alkyd, hariho imigozi ibiri kurwego rutandukanye. Imirongo ibiri imwe, imigozi myinshi, hamwe na conjugated double bond irahinduka byoroshye okiside kugirango ibe peroxide mubushyuhe bwinshi, bigatuma ibara ryijimye, mugihe antioxydants ishobora kubora hydroperoxide kugirango yorohereze ibara.

2. Byakoreshejwe muri synthesis ya PU ikiza
Umuti ukiza PU muri rusange bivuga prepolymer ya trimethylolpropane (TMP) na toluene diisocyanate (TDI). Iyo resin ihuye nubushyuhe numucyo mugihe cya synthesis, urethane ibora amine na olefine ikamena urunigi. Niba amine ari impumuro nziza, iba oxyde kugirango ihinduke chromofore.

3. Gushyira mubikorwa bya pompe ya thermosetting
Antioxydants ivanze ya fosifite ikora cyane hamwe na antioxydants ya fenolike, ibereye kurinda ifu yifu ya okiside yangiza mugihe cyo gutunganya, gukiza, gushyuha nubundi buryo. Mubisabwa harimo polyester epoxy, yahagaritswe isocyanate TGIC, insimburangingo ya TGIC, umurongo wa epoxy umurongo hamwe na resmosetting acrylic resin.

Nanjing Yavutse Ibikoresho bishya bitanga ubwoko butandukanye bwaantioxydantsinganda za plastiki, gutwikira, inganda.

Hamwe no guhanga udushya no gutera imbere mu nganda zitwikiriye, akamaro ka antioxydants yo gutwikira bizagenda bigaragara, kandi umwanya witerambere uzaba mugari. Mu bihe biri imbere, antioxydants izatera imbere mu cyerekezo cya misile ihanitse cyane, imikorere myinshi, imikorere myiza, gushya, guhuriza hamwe, kwitabira no kurengera ibidukikije. Ibi birasaba abimenyereza gukora ubushakashatsi bwimbitse haba muburyo ndetse nuburyo bukoreshwa kugirango bakomeze kubitezimbere, gukora ubushakashatsi bwimbitse kubiranga imiterere ya antioxydants, no kurushaho guteza imbere antioxydants nshya kandi ikora neza ishingiye kuri ibi, bizagira ingaruka zikomeye mugutunganya no gushyira mubikorwa inganda zitwikiriye. Antioxydants yo gutwikira izarushaho gukoresha imbaraga nyinshi kandi izane inyungu nziza mubukungu nikoranabuhanga.