Alifatique polyamide yuburyo butandukanye yakozwe mubucuruzi, muribo PA6, PA66, PA46, PA11 na PA12 nibyingenzi.Kwangirika kwa Oxidative muri PA biterwa nurwego rwa kristu n'ubucucike bw'icyiciro cya amorphous.Ukurikije uburyo gakondo, polyamide ya alifatique ihagarikwa hamwe nu munyu muke wumuringa (kugeza 50 ppm) uhujwe na ion ya halogene (nka iyode na ion ya bromide).Imikorere ya sisitemu ya stabilisateur iratangaje kuko ion z'umuringa zifatwa nk'imfashanyo ishaje muri polyolefine.Uburyo bwo guhagarika ingaruka za sisitemu y'umuringa / halogen ikomeje kwigwa.
Amine ya Aromatic ni stabilisateur isanzwe yongera LTTS, ariko iyo ikoreshejwe muri PA, irashobora gutera ibara rya polymer.Antioxydants ya fenol irashobora kunoza ibara ryibanze nyuma ya polycondensation kugirango ihagarike polyamide ya alifatique.Mubisanzwe, iyi antioxydeant yongeweho mbere yuko reaction ya polycondensation irangira.
Imbonerahamwe ikurikira iragereranya imiterere ya stabilisateur zitandukanye zikoreshwa kuri alifatique polyamide.
| Sisitemu ya AO | Ibyiza | Intege nke |
| Umunyu wumuringa / iyode | Nibyiza cyane mubitekerezo bike Iyo ubushyuhe bwo gusaza buri hejuru ya 150 ° C, bugira uruhare runini muri LTTS ya polymer | Gukwirakwiza nabi muri polymers Kureka bibaho byoroshye mugihe uhuye namazi cyangwa amazi / umusemburo Birashobora gutera ibara |
| Aromatic amine | Itanga umusanzu cyane muri LTTS ya polymers | Witondere cyane ibara |
| Fenol | Itanga umusanzu cyane muri LTTS ya polymers Imikorere myiza yamabara Urashobora kongerwaho mugihe cyo kwibanda Nta reaction yo kuruhande ibaho hamwe nabandi polymers mugihe cyo kuvanga |
Ku bushyuhe bwinshi (urugero hejuru ya 150 ° C), sisitemu ya stabilisateur y'umuringa / iyode yerekana ibisubizo byiza.Nyamara, mugihe cy'ubushyuhe buke, antioxydants ya fenolike yonyine cyangwa ifatanije na fosifite irashobora gukora neza.Iyindi nyungu yo gukoresha antioxydants ya fenolike ni uko igumana ibara ryibanze rya polypolymer kugeza igihe ubushyuhe busaza neza kuruta umunyu wumuringa.
Guhindura ibara rya polymer nyuma yubusaza ntibigabanuka ugereranije nubukanishi bwayo.Guhindura ibara birashobora no kubaho mugihe gito, ariko imbaraga zidasanzwe za elastique no kuramba kwa polymer ntizizagira ingaruka kugeza nyuma.
Igice kinini cyubuvanganzo gisobanura uburyo bwinshi bwo gukoresha ibirahuri-fibre byongerewe imbaraga za polyamide mu nganda z’imodoka, nka moteri ya moteri, imipira ya radiator na grilles, feri hamwe nogukwirakwiza amashanyarazi, amaboko ya valve, amapine, abahuza feri yikirere hamwe na hoods.Antioxydants ya fenolike, yonyine cyangwa ifatanije na fosifite, ni stabilisateur nziza kuri GFR PA66.
Ifumbire fatizo ya fenol + fosifite ikomatanya ni 1098 + 168, ishobora gukoreshwa mubushyuhe buke butari bwongerewe ubushyuhe bwo gutunganya, kandi ibara ryavuyeho riratera imbere.Nyamara, kuri sisitemu ya polyamide nko gushimangira fibre fibre, ubushyuhe bwo gutunganya buri hejuru (hafi 300 ° C), kunanirwa kwangirika kwubushyuhe 168, muriki gihe, dukoresha cyane 1098 + S9228 nkurunana rwo guhangana nubushyuhe bwiza, nabwo ikoreshwa cyane muri formula yubushyuhe bwo hejuru nylon.
Nyuma y’ibisubizo bya sisitemu, byagaragaye ko 1098 + S9228 igifite umwanya wo kunoza amabara ya nylon yubushyuhe bwo hejuru, kandi Sarex Chemical yatangije ibicuruzwa byavuguruwe SARAFOS 2628P5 (kurwanya fosifore ishingiye ku mfashanyo) na SARANOX PA2624 (bibangamira fenol na fosifite) guhuza) kugira imikorere myiza muri nylon-ubushyuhe bwo hejuru bwumuhondo, kandi amakuru yikizamini ni aya akurikira:
PA66, 270 ° C gusohora byinshi no kugerageza guteka
| ■ 0.1% 1098 + 0.2% 9228 | 8.32 | 15.5 | 21.11 | 33.71 |
| ■ 0.1% 109810.2% 2628P5 | 3.85 | 10.88 | 17.02 | 21.16 |
| ■ 3% PA2624 | -3.25 | 1.87 | 4.94 | 12.21 |
Amakuru yavuzwe haruguru yagenwe na Laboratoire ya Sarex
Ugereranije nubunini bungana na SARAFOS 2628P5 na S9228, ibara ryo gusohora byinshi hamwe nubushyuhe bwa 120 ° C kuri 12h bifite imikorere myiza, kandi kurwanya hydrolysis yibicuruzwa ubwabyo nabyo biruta ibya S9228, bifite porogaramu nziza ibyiringiro muguhindura PA.
Mugihe hari byinshi bisabwa kugirango ibara ryambere, birasabwa kongeramo SARANOX PA2624, usibye ifu yifu, turashobora kandi guha abakiriya ibishushanyo mbonera bya PA antioxydeant hamwe na antioxydeant idafite ubwikorezi, byoroshye kongeramo no gutatanya, no gufasha amahugurwa yo kubyaza umusaruro nta mukungugu.
| PA66, gusohora inshuro nyinshi kuri 270 ° C. | 0.1% 1098 + 0.2% 9228 | 0.1% 1098 + 0.2% 2628P5 | 0.3% PA2624 |
| 1 gusohora |  |  |  |
| 3 |  |  |  |
| 5 |  |  |  |
| Guteka kuri 120 ° C, 12h
|  |  |  |
Amakuru yavuzwe haruguru yagenwe na Laboratoire ya Sarex
Igihe cyo kohereza: Ugushyingo-14-2022