Cov tshuaj polyurethane catalysts ua lub luag haujlwm tseem ceeb hauv kev tsim cov ua npuas ncauj qhib, uas yog cov khoom siv tau dav dav hauv ntau yam lag luam. Ua npuas ncauj qhib, uas muaj cov qauv sib txuas ua ke, tso cai rau huab cua thiab kua hla dhau, ua rau nws ua pa tau zoo thiab mos. Cov qauv tshwj xeeb no sib txawv ntawm cov ua npuas ncauj kaw, uas muaj cov hlwb cais uas muab cov duab ntom thiab tawv dua.
Cov ntawv thov ntawm Open-Cell Foam
Ua npuas ncauj qhib pom nws cov txiaj ntsig zoo hauv ntau qhov chaw vim nws cov yam ntxwv tshwj xeeb. Ib qho ntawm nws cov ntawv thov tseem ceeb yog nyob rau hauv kev lag luam rooj tog, qhov twg nws yog siv rau hauv kev cushioning thiab upholstery los muab kev nplij siab thiab kev txhawb nqa. Nws qhov mos thiab yoog tau ua rau nws zoo tagnrho rau cov txaj pw, hauv ncoo, thiab rooj zaum.
Hauv kev lag luam tsheb, cov ua npuas ncauj qhib-cell siv rau hauv cov ntaub thaiv rooj zaum thiab cov rwb thaiv suab. Lub peev xwm ntawm cov ua npuas ncauj los nqus suab thiab kev co ua rau kom muaj kev nplij siab thiab kev ntsiag to ntawm cov chav hauv tsheb. Tsis tas li ntawd, nws qhov sib dua ua rau lub tsheb siv tau zoo dua los ntawm kev txo qhov hnyav yam tsis muaj kev cuam tshuam rau kev nplij siab.
Lwm qhov tseem ceeb ntawm kev siv ua npuas ncauj qhib-cell yog nyob rau hauv kev lag luam kev tsim kho. Nws yog siv ua cov khoom siv rwb thaiv tsev uas pab tswj qhov kub thiab txias hauv tsev los ntawm kev muab kev rwb thaiv tsev. Lub npuas dej ua pa tau kuj pab tiv thaiv kom tsis txhob muaj dej noo, yog li txo qhov kev pheej hmoo ntawm pwm thiab pwm.
Ua npuas dej qhib kuj tseem muaj ntau hauv kev lag luam ntim khoom. Nws cov khoom siv cushioning tiv thaiv cov khoom yooj yim thaum lub sijhawm xa khoom thiab tuav. Tsis tas li ntawd, nws lub peev xwm los ua kom haum rau ntau yam duab ua rau nws tsim nyog rau kev daws teeb meem ntim khoom.
Lub Luag Haujlwm ntawm Polyurethane Catalysts hauv Open-Cell Foam Synthesis
Kev tsim cov ua npuas polyurethane qhib-cell muaj feem cuam tshuam nrog kev tshuaj lom neeg nyuaj, qhov twg cov tshuaj polyurethane catalysts yog qhov tseem ceeb. Cov tshuaj catalysts no cuam tshuam rau qhov nrawm ntawm kev ua tshuaj thiab cov khoom kawg ntawm cov ua npuas. Muaj ob hom tshuaj catalysts tseem ceeb siv hauv cov txheej txheem no: amine catalysts thiab cov tshuaj catalysts raws li hlau.
Cov Tshuaj Amine Catalysts: Cov no siv dav hauv kev tsim cov ua npuas ncauj qhib vim lawv muaj peev xwm tswj tau qhov sib npaug ntawm cov tshuaj urethane (polyol-isocyanate) thiab urea (dej-isocyanate). Piv txwv ntawm cov tshuaj amine catalysts suav nrog triethylenediamine (TEDA), bis(dimethylaminoethyl)ether (BDMAEE), thiab N,N-dimethylcyclohexylamine (DMCHA). Cov tshuaj catalysts no pab tsim cov qauv qhib-cell los ntawm kev cuam tshuam rau lub sijhawm ua npuas ncauj nce thiab gel, ua kom muaj kev tsim cov cell sib xws thiab sib xws.
Cov Catalysts Uas Muaj Hlau: Cov tshuaj Organotin yog cov catalysts uas muaj hlau siv rau hauv kev tsim cov ua npuas polyurethane. Cov catalysts no ua kom cov tshuaj isocyanate-polyol ua haujlwm sai dua, ua kom cov khoom siv kho tshuab thiab kev ruaj khov ntawm cov ua npuas zoo dua. Dibutyltin dilaurate (DBTDL) thiab stannous octoate yog cov piv txwv ntawm cov catalysts organotin siv rau hauv cov txheej txheem no.
Xaus lus
Ua npuas polyurethane qhib-cell, nrog nws ntau yam kev siv, vam khom rau qhov tseeb thiab tswj tau cov tshuaj tiv thaiv uas ua los ntawm polyurethane catalysts. Los ntawm kev nkag siab txog lub luag haujlwm ntawm cov catalysts no, cov chaw tsim khoom tuaj yeem ua kom zoo dua cov khoom ua npuas kom tau raws li cov kev xav tau ntawm daim ntawv thov tshwj xeeb, ua kom muaj kev ua tau zoo thiab kev ntseeg siab thoob plaws ntau yam lag luam. Ua tus neeg muab khoom ntawm polyurethane catalysts, peb mob siab rau kev muab cov khoom tseem ceeb uas xav tau los tsim cov npuas qhib-cell zoo, txhawb nqa kev tsim kho tshiab thiab kev ua tau zoo hauv qhov chaw ua haujlwm no.
Lub sijhawm tshaj tawm: Lub Rau Hli-11-2024