Ammonium Polyphosphate Flame Retardant Mechanism thiab qhov zoo dua

Ammonium Polyphosphate Flame Retardant Mechanism thiab Qhov Zoo

Ammonium polyphosphate (APP) cov tshuaj tua hluav taws tuaj yeem muab faib ua peb hom raws li nws qib polymerization: qis, nruab nrab, thiab siab polymerization. Qhov siab dua qhov polymerization degree, qhov qis dua qhov solubility hauv dej, thiab vice versa. Structurally, nws tuaj yeem muab faib ua cov qauv crystalline thiab amorphous, nrog crystalline APP yog cov ntsev tsis yaj hauv dej ntev. Cov mis molecular dav dav ntawm APP yog (NH₄)ₙ₊₂PₙO₃ₙ₊₁. Thaum n ntau ntawm 10 txog 20, nws yaj hauv dej; thaum n tshaj 20, nws dhau los ua tsis yaj. APP tsis muaj tshuaj lom, tsis muaj ntxhiab, tsis xeb, thiab qhia txog qhov tsis tshua muaj hygroscopicity, thermal stability siab, thiab kev ua tau zoo heev ua cov tshuaj tua hluav taws tsis muaj halogen.

Lub Tshuab Tiv Thaiv Hluav Taws Xob ntawm APP:
Thaum cua sov, APP yuav lwj mus ua poly-/metaphosphoric acid, uas ua rau lub cev qhuav dej thiab carbonization ntawm cov khoom siv organic. Nws nthuav dav thaum cua sov, tsim ib txheej tiv thaiv uas cais cov khoom ntawm oxygen, yog li ua kom muaj hluav taws kub. Tsis tas li ntawd, qhov thermal decomposition ntawm APP tso tawm cov pa roj uas tsis kub hnyiab xws li CO₂ thiab NH₃, uas ua rau cov pa oxygen hauv huab cua tsis sib xyaw, txiav cov pa oxygen ntxiv. Cov yam ntxwv no ua rau muaj pa luam yeeb tsawg, tsis muaj roj lom, thiab tua nws tus kheej. Qhov tseem ceeb, qhov tsis muaj roj lom tsis yog tsuas yog ib puag ncig zoo xwb tab sis kuj tseem ceeb rau kev nyab xeeb ntawm lub neej - cov ntaub ntawv qhia tias ntau dua 80% ntawm cov neeg tuag hauv cov xwm txheej hluav taws loj yog tshwm sim los ntawm cov pa lom los ntawm kev hlawv yas, cov khoom siv hluav taws xob, thiab lwm yam khoom siv, tsis yog cov nplaim taws lawv tus kheej.

Chaw tsim khoom ntawm APP Flame Retardant:
Taifeng Flame Retardant siv cov thev naus laus zis microencapsulation ntau txheej thoob ntiaj teb los tsim cov APP qib polymerization siab nrog cov phosphorus thiab nitrogen ntau. Cov khoom muaj kev ruaj khov zoo heev, solubility dej tsawg, pH ze-nruab nrab, thiab ua haujlwm hluav taws kub siab. Nws yog cov khoom dawb hmoov, tsis hygroscopic, tsis kub hnyiab, thiab muaj qhov hnyav molecular siab (n > 1200), kev ruaj khov, thiab tiv taus huab cua. Nws yog siv dav hauv cov txheej txheem tiv thaiv hluav taws uas siv dej, cov txheej txheem textile, thiab ua cov khoom tseem ceeb hauv cov thermoplastics uas tiv taus hluav taws kub. Cov khoom encapsulated raug kho saum npoo kom zoo dua, ua kom tsis txhob noo noo, pH alkaline, thiab txawm tias solubility dej qis dua.

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