Kev siv Phosphorus-Based Flame Retardants hauv PP

Phosphorus-based flame retardants yog ib hom kev ua haujlwm siab, txhim khu kev qha, thiab siv dav siv hluav taws xob uas tau txais txiaj ntsig zoo los ntawm cov kws tshawb fawb. Cov txiaj ntsig zoo kawg nkaus tau ua tiav hauv lawv qhov kev sib txuas thiab kev siv.

1. Daim ntawv thov ntawm Phosphorus-Based Flame Retardants hauv PP

Lub cev muaj zog ntawm polypropylene (PP) ua lub luag haujlwm tseem ceeb hauv nws cov ntawv thov kev lag luam. Txawm li cas los xij, nws qhov qis qis qis qis (LOI) tsuas yog nyob ib puag ncig 17.5%, ua rau nws muaj qhov kub nyhiab heev nrog rau qhov kub ceev. Tus nqi ntawm PP cov ntaub ntawv hauv kev lag luam yog cuam tshuam los ntawm ob qho tib si lawv cov nplaim hluav taws xob thiab cov khoom siv lub cev. Nyob rau hauv xyoo tas los no, microencapsulation thiab kev hloov kho saum npoo tau dhau los ua qhov tseem ceeb hauv cov khoom siv hluav taws xob PP.

Piv txwv 1: Ammonium polyphosphate (APP) hloov nrog silane coupling tus neeg sawv cev (KH-550) thiab silicone resin ethanol tov tau siv rau cov ntaub ntawv PP. Thaum cov feem loj ntawm kev hloov kho APP mus txog 22%, LOI ntawm cov khoom tau nce mus rau 30.5%, thaum nws cov khoom siv kho tshuab kuj ua tau raws li qhov yuav tsum tau ua thiab ua tau zoo tshaj PP cov ntaub ntawv nplaim hluav taws-retarded nrog unmodified APP.

Piv txwv 2: APP tau encapsulated nyob rau hauv lub plhaub uas muaj melamine (MEL), hydroxyl silicone roj, thiab formaldehyde resin ntawm in-site polymerization. Tom qab ntawd cov microcapsules tau ua ke nrog pentaerythritol thiab siv rau PP cov ntaub ntawv rau cov nplaim hluav taws. Cov khoom tau nthuav tawm cov nplaim hluav taws zoo heev, nrog LOI ntawm 32% thiab qhov ntsuas hluav taws xob ntsug ntawm UL94 V-0. Txawm tias tom qab dej kub immersion kev kho mob, cov composite khaws cia zoo nplaim retardancy thiab txhua yam khoom.

Piv txwv 3: APP tau hloov kho los ntawm txheej txheej nrog aluminium hydroxide (ATH), thiab APP hloov kho tau ua ke nrog dipentaerythritol ntawm qhov sib piv loj ntawm 2.5: 1 rau siv hauv PP cov ntaub ntawv. Thaum tag nrho cov seem ntawm cov nplaim hluav taws kub yog 25%, LOI mus txog 31.8%, cov nplaim hluav taws kub hnyiab tau ua tiav V-0, thiab lub siab tshaj plaws tso tawm tus nqi tau txo qis.

2. Daim ntawv thov ntawm Phosphorus-Based Flame Retardants hauv PS

Polystyrene (PS) yog cov nplaim hluav taws kub heev thiab tseem kub hnyiab tom qab qhov hluav taws kub raug tshem tawm. Txhawm rau daws cov teeb meem xws li kev tso tawm hluav taws xob siab thiab hluav taws xob nrawm, halogen-dawb phosphorus-raws li nplaim hluav taws ua lub luag haujlwm tseem ceeb hauv PS nplaim taws retardancy. Cov txheej txheem nplaim hluav taws-retardant rau PS muaj xws li txheej, impregnation, txhuam, thiab polymerization-theem nplaim hluav taws retardancy.

Piv txwv 1: Ib qho phosphorus-muaj nplaim-retardant adhesive rau expandable PS yog synthesized ntawm sol-gel txoj kev siv N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane thiab phosphoric acid. Nplaim-retardant PS ua npuas ncauj tau npaj siv txoj kev txheej. Thaum qhov kub siab tshaj 700 ° C, PS ua npuas ncauj kho nrog cov nplaum tsim ib txheej char tshaj 49%.

Cov kws tshawb fawb thoob ntiaj teb tau tshaj tawm cov phosphorus-muaj cov nplaim hluav taws-retardant cov qauv rau hauv cov yas lossis acrylic compounds, uas tom qab ntawd copolymerized nrog styrene los tsim cov phosphorus-muaj styrene copolymers tshiab. Cov kev tshawb fawb qhia tau hais tias piv rau cov ntshiab PS, phosphorus-muaj styrene copolymers pom tau zoo heev LOI thiab char residue, qhia superior thermal stability thiab nplaim retardancy.

Piv txwv 2: Ib qho vinyl-terminated oligomeric phosphate hybrid macromonomer (VOPP) tau grafted rau hauv cov saw tseem ceeb ntawm PS ntawm graft copolymerization. Lub graft copolymer nthuav tawm nplaim retardancy los ntawm cov khoom-theem mechanism. Raws li VOPP cov ntsiab lus tau nce, LOI tau nce siab, qhov siab tshaj plaws tso tawm tus nqi thiab tag nrho cov cua sov tso tawm tau txo qis, thiab yaj dripping ploj mus, ua kom pom cov nplaim hluav taws kub-retardant.

Tsis tas li ntawd, inorganic phosphorus-based nplaim retardants tuaj yeem txuas nrog graphite lossis nitrogen-based nplaim retardants rau siv hauv PS nplaim taws retardancy. Txheej los yog txhuam hniav kuj tuaj yeem ua hauj lwm los siv cov phosphorus-raws li nplaim hluav taws retardants rau PS, txhim kho cov khoom LOI thiab char residue.

3. Kev siv Phosphorus-Based Flame Retardants hauv PA

Polyamide (PA) yog cov nplaim hluav taws kub heev thiab tsim cov pa taws ntau heev thaum lub sij hawm combustion. Txij li thaum PA tau siv dav hauv cov khoom siv hluav taws xob thiab cov khoom siv, qhov kev pheej hmoo ntawm hluav taws kub yog qhov tshwj xeeb. Vim yog cov qauv amide hauv nws cov saw tseem ceeb, PA tuaj yeem ua nplaim hluav taws kub nyhiab siv ntau txoj hauv kev, nrog rau ob qho tib si ntxiv thiab cov nplaim hluav taws kub hnyiab ua pov thawj zoo heev. Ntawm cov nplaim hluav taws-retardant PAs, alkyl phosphinate ntsev yog siv dav tshaj plaws.

Piv txwv 1: Aluminium isobutylphosphinate (A-MBPa) tau ntxiv rau PA6 matrix los npaj cov khoom sib xyaw. Thaum lub sij hawm ntsuas nplaim taws, A-MBPa decomposed ua ntej PA6, tsim ib txheej tuab thiab ruaj khov char txheej uas tiv thaiv PA6. Cov khoom ua tiav LOI ntawm 26.4% thiab qhov ntsuas hluav taws xob ntawm V-0.

Piv txwv 2: Thaum lub sij hawm polymerization ntawm hexamethylenediamine thiab adipic acid, 3 wt% ntawm cov nplaim hluav taws retardant bis (2-carboxyethyl) methylphosphine oxide (CEMPO) tau ntxiv los tsim cov nplaim hluav taws PA66. Cov kev tshawb fawb tau pom tias cov nplaim hluav taws xob PA66 tau pom cov nplaim hluav taws zoo dua piv rau cov pa PA66, nrog rau LOI ntau dua. Kev tsom xam ntawm lub char txheej qhia tawm tias cov nplaim hluav taws xob ntawm cov nplaim hluav taws xob thiab roj hloov pauv cov nplaim hluav taws xob.

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