Kev Taw Qhia Txog Cov Tshuaj Tiv Thaiv Hluav Taws Uas Muaj Nitrogen Rau Nylon

Kev Taw Qhia Txog Cov Tshuaj Tiv Thaiv Hluav Taws Uas Muaj Nitrogen Rau Nylon

Cov tshuaj tua hluav taws uas muaj nitrogen yog cov yam ntxwv los ntawm kev tsis muaj tshuaj lom, tsis xeb, thermal thiab UV stability, zoo hluav taws kub, thiab tus nqi tsim nyog. Txawm li cas los xij, lawv cov teeb meem suav nrog kev nyuaj ua thiab kev tawg tsis zoo hauv cov polymer matrix. Cov tshuaj tua hluav taws uas muaj nitrogen rau nylon suav nrog MCA (melamine cyanurate), melamine, thiab MPP (melamine polyphosphate).

Lub tshuab ua kom tsis txhob kub hnyiab muaj ob yam:

1. "Sublimation thiab Endothermic" Lub Cev Lub Cev: Cov nplaim taws retardant txo qhov kub ntawm qhov chaw ntawm cov khoom polymer thiab cais nws ntawm huab cua los ntawm sublimation thiab cua sov nqus.
2. Catalytic Carbonization thiab Intumescent Mechanism nyob rau hauv Condensed Theem: Cov nplaim taws retardant cuam tshuam nrog nylon, txhawb kev carbonization ncaj qha thiab nthuav dav.

MCA muaj ob txoj haujlwm hauv cov txheej txheem tiv thaiv hluav taws, txhawb nqa ob qho tib si carbonization thiab foaming. Lub tshuab tiv thaiv hluav taws thiab kev ua haujlwm zoo sib txawv nyob ntawm hom nylon. Kev tshawb fawb ntawm MCA thiab MPP hauv PA6 thiab PA66 qhia tau hais tias cov tshuaj tiv thaiv hluav taws no ua rau muaj kev sib txuas hauv PA66 tab sis txhawb kev puas tsuaj hauv PA6, ua rau muaj kev ua tau zoo dua ntawm kev tiv thaiv hluav taws hauv PA66 dua li hauv PA6.

1. Melamine Cyanurate (MCA)

MCA yog tsim los ntawm melamine thiab cyanuric acid hauv dej, tsim cov hydrogen-bonded adduct. Nws yog ib qho zoo heev halogen-free, low-toxicity, thiab low-pa luam yeeb retardant feem ntau siv hauv nylon polymers. Txawm li cas los xij, MCA ib txwm muaj lub melting point siab (decomposing thiab sublimating saum 400 ° C) thiab tsuas yog tuaj yeem sib xyaw nrog cov resins hauv daim ntawv khoom khov, ua rau muaj kev sib kis tsis sib xws thiab qhov loj ntawm cov khoom loj, uas cuam tshuam tsis zoo rau kev ua haujlwm ntawm nplaim taws. Tsis tas li ntawd, MCA feem ntau ua haujlwm hauv theem roj, ua rau muaj cov char tsawg thiab cov txheej carbon xoob, tsis tiv thaiv thaum lub sijhawm combustion.

Yuav kom daws tau cov teeb meem no, cov thev naus laus zis molecular composite tau siv los hloov MCA los ntawm kev qhia txog cov khoom siv ntxiv rau kev tiv thaiv hluav taws (WEX), uas txo qhov melting point ntawm MCA, ua rau co-melting thiab ultra-fine dispersion nrog PA6. WEX kuj tseem ua rau cov char tsim thaum lub sijhawm combustion, txhim kho qhov zoo ntawm cov txheej carbon thiab ua kom muaj zog ntawm cov nyhuv condensed-phase flame-retardant ntawm MCA, yog li tsim cov khoom siv tiv thaiv hluav taws nrog kev ua tau zoo heev.

2. Intumescent Flame Retardant (IFR)

IFR yog ib qho tseem ceeb uas tsis muaj halogen-free flame-retardant system. Nws cov txiaj ntsig zoo dua li cov halogenated flame retardants suav nrog kev tso pa tawm tsawg thiab cov pa roj tsis muaj tshuaj lom thaum lub sijhawm combustion. Ntxiv mus, cov txheej char uas tsim los ntawm IFR tuaj yeem nqus tau cov polymer uas yaj thiab hlawv, tiv thaiv kev ntws thiab hluav taws kis.

Cov ntsiab lus tseem ceeb ntawm IFR muaj xws li:

• Qhov chaw roj (cov tshuaj melamine)
• Cov kua qaub (phosphorus-nitrogen flame retardants)
• Qhov chaw carbon (nylon nws tus kheej)
• Cov tshuaj ntxiv synergistic (piv txwv li, zinc borate, aluminium hydroxide) thiab cov neeg sawv cev tiv thaiv kev ntws.

Thaum qhov sib piv ntawm cov phosphorus-nitrogen flame retardants rau melamine-based compounds yog:

• Hauv qab 1%: Tsis muaj zog tiv thaiv hluav taws txaus.
• Saum toj no 30%: Kev ua kom volatilization tshwm sim thaum lub sijhawm ua tiav.
• Nruab nrab ntawm 1% -30% (tshwj xeeb tshaj yog 7% -20%): Kev ua haujlwm zoo tshaj plaws uas tiv taus hluav taws yam tsis cuam tshuam rau kev ua haujlwm.

  More info., pls contact lucy@taifeng-fr.com