Dab tsi yog cov khoom xyaw ntawm nplaim retardant silicone?

Dab tsi yog cov khoom xyaw ntawm nplaim retardant silicone?
Silicone: Yooj yim silicone yog feem ntau yog silicone roj hmab, uas yog muab faib ua chav sov silicone roj hmab (RTV) thiab kub vulcanized silicone roj hmab (HTV). Chav sov vulcanized silicone roj hmab tuaj yeem yauv ua kom tsis muaj kev pom zoo ntawm chav tsev kub los ua tus elastomer. Nws yog ib qho yooj yim siv thiab feem ntau siv hauv qee qhov kev tsim kho hauv chaw lossis kev npaj ntawm cov khoom me; Cov roj kub kub vulcanized silicone roj hmab yuav tsum tau vulcanized ntawm qhov kub siab dua (feem ntau 150 degree {2} {2}} degree). Cov roj hmab vulcanized muaj lub zog siab thiab cov khoom siv lub cev ua kom zoo thiab haum rau kev tsim khoom loj.
Nplaim retardant:
Halogen-muaj nplaim taws retardant: xws li secabromodetants, tetrabromodethans, thiab lwm yam nplaim taws retardant mechanism yog tso hydrogen halides thaum lub sijhawm sib txuas. Cov roj no tuaj yeem ntes cov kev dawb radicals tsim thaum lub sij hawm combrustion cov kab sib txuas ntawm kev sib txuas ntawm kev sib txuas, yog li ua tiav cov nplaim taws retardant nyhuv. Txawm li cas los xij, txij li halogen-muaj nplaim taws retardants tuaj yeem tsim cov roj ntsha ua rau muaj kev lom zem thiab ua rau lawv siv tau qee yam kev txwv.
Halogen-free flame retardants: Common metal hydroxides include aluminum hydroxide and magnesium hydroxide. Lawv decompose thaum rhuab, nqus tau ntau npaum li cas ntawm cov cua sov thiab txo qis qhov kub ntawm cov khoom saum npoo. Nyob rau tib lub sijhawm, cov dej vapor tsim los ntawm cov decomposition tuaj yeem dilute cov oxygen concentration thiab ua si nplaim retardant lub luag haujlwm. Ib qho ntxiv, phosphorus nplaim taws retardants xws li cov phosphorus thiab cov phosphate es kuj siv tau siv. Lawv cov nplaim taws retardant mechanism suav nrog kev tsim cov pa roj carbon monect rau ntawm cov pa sib txawv thiab cua sov, thiab kev ntes dawb radicals nyob rau hauv theem roj.
Tus neeg saib xyuas lub zog: txhawm rau txhim kho lub zog, hardness thiab hnav tsis kam ntawm nplaim retardant silicone, txhawb cov neeg sawv cev ua ke feem ntau ntxiv. Qhov feem ntau siv tau txhawb nqa tus neeg sawv cev yog fumed silica (uas tuaj yeem tsim cov roj hmab cov roj hmab silicone los txhim kho cov cuab yeej siv ntau yam ntawm silicone. Precipitated silica tseem tuaj yeem siv los ua tus neeg sawv cev txhawb zog, tab sis nws cov nyhuv txhawb tau zoo me ntsis dua li ntawm cov fumed silica.
Cleanizer: Lub luag haujlwm ntawm cov yas yas yog txhawm rau txo cov hardness thiab viscosity ntawm silicone thiab txhim kho nws kev ua haujlwm thiab hloov tau. Cov roj uas siv suav nrog cov roj methyl Silicone, thiab lwm yam kev ua haujlwm tau yooj yim rau kev sib xyaw ua ke hauv cov ntawv thov sib txawv.
Vulcanizer: txoj haujlwm ntawm vulcanizer yog ua rau cov qauv sib txuas los ntawm cov qauv roj hmab uas silicone los ntawm cov kua viscous rau hauv cov khoom muaj kuab. Rau chav sov vulcanized silicone roj hmab, feem ntau siv vulcanizers suav nrog platinum-muaj catalysts, parsoxides, thiab lwm yam .; Kub volcanized silicone roj hmab feem ntau siv organic peroxides ua pulcanizers.
Lwm yam kev ntxiv ntxiv: raws li cov kev xav tau tshwj xeeb, xws li antioxidant los tiv thaiv silicone los ntawm oxidation, thiab lwm yam thaum siv tau ntev; coupling cov neeg sawv cev txhawm rau txhim kho qhov kev sib txuas lus sib txuas lus ntawm silicone thiab fillers; Masterbatches muab cov xim sib txawv, thiab lwm yam.