Puas yog DMTDA Txoj Kev Ua Haujlwm Zoo rauMOCAhauv Polyurethane Elastomer Production?
Xaiv tus neeg sawv cev kho kom haum yog ib feem tseem ceeb ntawm kev tsim cov khoom zoo polyurethane elastomers. Nws cuam tshuam rau cov khoom siv kho tshuab, kev ua haujlwm, thiab kev nyab xeeb ntawm chaw ua haujlwm. MOCA tau siv dav hauv cam khwb cia polyurethane daim ntawv thov rau ntau xyoo, tab sis kev loj hlob ntawm kev ua haujlwm kev noj qab haus huv tau txhawb cov tuam txhab los ntsuas lwm txoj hauv kev xws li DMTDA.
MOCA, tseem hu ua 4,4'-methylene-bis (2-chloroaniline), yog cov khoom muaj ntxhiab diamine feem ntau siv los kho polyurethane prepolymers. Nws tuaj yeem muab cov khoom siv dag zog zoo, kev ua haujlwm tsis zoo, thiab ua haujlwm ntev thaum lub formulation thiab curing txheej txheem tswj kom zoo. Txawm li cas los xij, MOCA nthuav tawm kev txhawj xeeb txog kev noj qab haus huv tseem ceeb vim tias qhov kis tau tuaj yeem tshwm sim los ntawm kev sib cuag ntawm daim tawv nqaij, nqus pa, lossis kev noj tsis zoo. Nws tau lees paub tias muaj peev xwm ua haujlwm carcinogen, ua kom muaj txiaj ntsig zoo tiv thaiv qhov tseem ceeb thaum khaws cia, hnyav, cua sov, sib tov, thiab ntxuav cov khoom siv.
DMTDA, los yog dimethylthiotoluenediamine, yog lwm cov tshuaj tsw qab diamine siv hauv polyurethane elastomer systems. Tsis zoo li cov khoom MOCA, DMTDA yog cov kua hauv chav sov. Qhov sib txawv no tuaj yeem ua rau cov khoom siv yooj yim dua thiab tshem tawm cov plua plav uas tsim los thaum tuav cov tshuaj tua kab mob. Rau cov neeg tsim khoom nrhiav kev txhim kho qhov chaw ua haujlwm, nws daim ntawv ua kua tuaj yeem muab cov txiaj ntsig zoo thaum tsim khoom.
Txawm li cas los xij, DMTDA yuav tsum tsis txhob suav tias yog cov khoom tsis muaj phom sij. Kev ua pa kom tsim nyog, cov cuab yeej tiv thaiv, thiab cov txheej txheem tuav kev nyab xeeb tseem tsim nyog. Cov neeg tsim khoom yuav tsum tshuaj xyuas cov ntaub ntawv kev nyab xeeb rau cov khoom tshwj xeeb thiab ntsuas kev pheej hmoo raug cuam tshuam raws li lawv cov kev ua haujlwm tiag tiag ua ntej hloov pauv.
Cov yam ntxwv ua haujlwm yog lwm qhov tseem ceeb rau kev txiav txim siab. Qhov kev xaiv ntawm curing tus neeg saib xyuas cuam tshuam cov tshuaj tiv thaiv ceev, lub sijhawm ua haujlwm, lub sijhawm demolding, thiab cov kev cai rau kev kho tom ntej. DMTDA tuaj yeem muab lub qhov rais ua haujlwm tsim nyog hauv qee cov qauv, tab sis nws qhov kev ua tau zoo nyob ntawm hom prepolymer, NCO cov ntsiab lus, curing-tus neeg sawv cev piv, thiab ua haujlwm kub. Kev hloov kho rau cov qauv uas twb muaj lawm yuav tsim nyog thaum hloov los ntawm MOCA.
Cov cuab yeej siv tshuab kawg kuj yuav tsum tau ua tib zoo soj ntsuam. Ob qho tshuaj tua kab tuaj yeem siv los tsim cov polyurethane elastomers nrog kev ua tau zoo, tab sis cov txiaj ntsig yuav txawv nyob ntawm cov qauv. Hardness, tensile lub zog, tsim kua muag kuj, abrasion kuj, thiab seem stability yuav tsum tau soj ntsuam raws li qhov yuav tsum tau ntawm daim ntawv thov. Tus neeg sawv cev kho uas ua tau zoo hauv ib lub cev yuav tsis xa cov txiaj ntsig zoo ib yam rau lwm qhov.
Ua ntej yuav txais DMTDA, cov tuam txhab tsim khoom yuav tsum ua qhov kev sim sim thiab ntsuas ob qho tib si ua tus cwj pwm thiab ua tiav cov khoom tiav. Cov kev xav tau kev nyab xeeb ntawm chaw ua haujlwm, kev tsim khoom, cov nqi khoom siv, thiab cov neeg siv khoom tshwj xeeb yuav tsum tau xav txog txhua yam.
Thaum kawg, xaiv tus neeg sawv cev kho muaj ntau dua li kev sib piv cov khoom ntiag tug. DMTDA muaj qhov sib txawv tuav profile los ntawm MOCA thiab tej zaum yuav yog ib qho kev xaiv tsim nyog rau qee qhov kev siv polyurethane elastomer. Qhov kev xaiv tsim nyog tshaj plaws yog nyob ntawm kev tsim tshwj xeeb, txheej txheem tsim khoom, kev xav tau kev nyab xeeb, thiab lub hom phiaj ua haujlwm.