Kenyelletso ea Li-Flame Retardants tse thehiloeng ho Nitrogen bakeng sa Nylon

Kenyelletso ea Li-Flame Retardants tse thehiloeng ho Nitrogen bakeng sa Nylon

Lintho tse thibelang lelakabe tse thehiloeng ho naetrojene li khetholloa ka chefo e tlase, ho se senye, botsitso ba mocheso le UV, ts'ebetso e ntle e thibelang lelakabe le ts'ebetso e ntle ea litšenyehelo. Leha ho le joalo, litšitiso tsa bona li kenyelletsa mathata a ts'ebetso le phallo e mpe ka har'a matrix a polymer. Li-retardants tse tloaelehileng tse thehiloeng ho naetrojene bakeng sa nylon li kenyelletsa MCA (melamine cyanrate), melamine, le MPP (melamine polyphosphate).

Mochine o thibelang lelakabe o kenyelletsa likarolo tse peli:

1. "Sublimation and Endothermic" Physical Mechanism: The retardant ea lelakabe e fokotsa mocheso oa holim'a thepa ea polymer mme e e arola moeeng ka ho kenngoa ha metsi le ho monya mocheso.
2. Catalytic Carbonization and Intumescent Mechanism in the Condensed Phase: The retardant flame e sebelisana le nylon, e khothalletsang carbonization e tobileng le katoloso.

MCA e bonts'a mesebetsi e 'meli ts'ebetsong e thibelang malakabe, e khothaletsang carbonization le ho foamisa. Mochine o thibelang lelakabe le katleho li fapana ho itšetlehile ka mofuta oa nylon. Lithuto tse mabapi le MCA le MPP ho PA6 le PA66 li senola hore li-retardants tsena tsa lelakabe li etsa hore ho be le khokahano ho PA66 empa li khothalletsa ho senyeha ho PA6, e leng se hlahisang ts'ebetso e ntle ea ho thibela mollo ho PA66 ho feta PA6.

1. Melamine Cyanrate (MCA)

MCA e entsoe ka melamine le asiti ea cyanuric ka metsing, 'me e etsa motsoako oa hydrogen-bonded. Ke ntho e ntle ka ho fetisisa e se nang halogen, e nang le chefo e tlaase, le e thibelang malakabe a tlaase a tsubang hangata e sebelisoang ho lipolyme tsa nylon. Leha ho le joalo, MCA ea setso e na le sebaka se phahameng sa ho qhibiliha (ho bola le ho theoha ka holimo ho 400 ° C) 'me e ka kopanngoa feela le li-resin tse nang le sebōpeho se tiileng, e leng se lebisang ho qhalakaneng ho sa tšoaneng le boholo ba likaroloana tse kholo, tse amang ts'ebetso e sa sebetseng hantle. Ho feta moo, MCA e sebetsa haholo karolong ea khase, e bakang sebopeho se tlase sa char le likarolo tse hlephileng, tse sa sireletseng tsa khabone nakong ea mollo.

Ho rarolla mathata ana, theknoloji ea motsoako oa limolek'hule e sebelisitsoe ho fetola MCA ka ho hlahisa tlatsetso e thibelang malakabe (WEX), e theolang ntlha ea ho qhibiliha ea MCA, e nolofalletsang ho qhibiliha le ho hasana ka mokhoa o hlakileng ka PA6. WEX e boetse e ntlafatsa sebopeho sa char nakong ea ho tuka, ho ntlafatsa boleng ba lesela la khabone le ho matlafatsa phello e thibelang lelakabe la MCA, ka tsela eo e hlahisa lisebelisoa tse thibelang lelakabe tse sebetsang hantle haholo.

2. Intumescent Flame Retardant (IFR)

IFR ke sistimi ea bohlokoa e thibelang malakabe e se nang halogen. Melemo ea eona ho feta li-halogenated flame retardants e kenyelletsa ho tsoa mosi o tlase le khase e se nang chefo nakong ea ho tuka. Ho feta moo, char layer e entsoeng ke IFR e ka monya polymer e qhibilihisitsoeng, e tukang, e thibela ho rotha le ho ata ha mollo.

Likarolo tsa bohlokoa tsa IFR li kenyelletsa:

• Mohloli oa khase (metsoako e thehiloeng melamine)
• Mohloli oa asiti (phosphorus-nitrogen retardants)
• Mohloli oa carbon (nylon ka boeona)
• Li-additives tsa Synergistic (mohlala, zinki borate, aluminium hydroxide) le li-anti-dripping agents.

Ha karolelano ea boima ba phosphorus-nitrogen retardants ho metsoako e thehiloeng melamine ke:

• Ka tlase ho 1%: Phello e sa lekaneng ea ho thibela mollo.
• Ka holimo ho 30%: Volatilization e etsahala nakong ea ts'ebetso.
• Pakeng tsa 1% -30% (haholo-holo 7% -20%): Ts'ebetso e nepahetseng ea ho thibela mollo ntle le ho ama ts'ebetso.

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