Polyether polyolsthiab polyester polyols yog ob hom ntawm polyols siv nyob rau hauv polyurethane manufacturing. Txawm hais tias ob qho tib si yog cov ntaub ntawv tseem ceeb rau kev tsim cov polyurethane ua npuas ncauj, elastomers, adhesives, coatings, thiab sealants, lawv cov qauv tshuaj muab lawv cov yam ntxwv sib txawv.
Kev nkag siab qhov sib txawv ntawm polyether polyols thiab polyester polyols pab cov neeg tsim khoom xaiv cov khoom tsim nyog rau cov ntawv thov tshwj xeeb thaum txhim kho cov khoom lag luam thiab kev pabcuam lub neej.
Polyether Polyol yog dab tsi?
Polyether polyol yog tsim los ntawm lub nplhaib- qhib polymerization ntawm alkylene oxides xws li propylene oxide, ethylene oxide, los yog tetrahydrofuran. Cov tshuaj tiv thaiv yog pib los ntawm cov tebchaw uas muaj cov nquag hydrogen atoms, suav nrog glycerol, ethylene glycol, lossis propylene glycol.
Vim hais tias cov pob txha molecular muaj ether txuas, polyether polyols muaj cov saw hlau molecular hloov tau thiab cov viscosity tsawg, ua rau lawv yooj yim rau kev ua haujlwm hauv ntau lub tshuab polyurethane.
Polyether polyols yog dav siv nyob rau hauv saj zawg zog polyurethane ua npuas ncauj, cam khwb cia polyurethane elastomers, ib daim tawv nqaij ua npuas ncauj, CASE daim ntaub ntawv, thiab ntau yam muaj polyurethane khoom.
Polyester Polyol yog dab tsi?
Polyester polyols yog tsim los ntawm polycondensation cov tshuaj tiv thaiv ntawm dicarboxylic acids thiab diols. Cov ntaub ntawv nyoos muaj xws li adipic acid, phthalic anhydride, ethylene glycol, thiab 1,4-butanediol.
Tsis zoo li polyether polyols, polyester polyols muaj ester pawg hauv lawv cov qauv molecular. Cov kev sib txuas ester no nce molecular polarity thiab ua rau muaj zog dua txhua yam, hardness, thiab tshuaj tiv thaiv.
Nyob ntawm qhov hnyav molecular, polyester polyols yuav tshwm sim li siab -cov kua viscosity los yog siv quav ciab- zoo li cov khib nyiab ntawm chav tsev kub.
Qhov sib txawv tseem ceeb ntawm Polyether Polyols thiab Polyester Polyols
Txawm hais tias ob qho khoom siv tuaj yeem tsim tau siab -cov khoom siv polyurethane, lawv muaj qhov zoo sib txawv.
Polyether polyols feem ntau muab cov tshuaj hydrolysis zoo heev, tsis tshua muaj -qhov kub thiab txias, thiab kev ua haujlwm zoo. Cov khoom siv polyurethane ua los ntawm polyether polyols tswj lawv cov khoom siv kho tshuab txawm tias tom qab ntev - lub sij hawm raug cov dej noo, ua rau lawv haum rau qhov chaw ntub dej thiab kev siv sab nraum zoov.
Polyester polyols feem ntau muab lub zog tensile ntau dua, tsim kua muag ua haujlwm, ua tsis taus, thiab roj tsis kam. Cov khoom no ua rau polyester-raws li polyurethane yog qhov kev xaiv zoo tshaj plaws rau kev thov kev lag luam uas xav tau kev ua haujlwm zoo tshaj plaws.
Txawm li cas los xij, polyester polyols feem ntau cuam tshuam rau hydrolysis vim ester bonds tuaj yeem maj mam degrade nyob rau hauv muaj dej noo. Hauv qhov sib piv, polyether polyols pom zoo ntev dua -lub sij hawm tiv thaiv dej thiab av noo.
Kev sib piv
Polyether-raws li polyurethane feem ntau yog nyiam thaum hloov tau yooj yim, resilience, hydrolysis tsis kam, thiab qis- qhov kub thiab txias ua haujlwm yog qhov tseem ceeb.
Polyester-raws li polyurethane feem ntau yog xaiv thaum lub zog siab, hnav tsis kam, tiv thaiv tshav kub, thiab tshuaj lom neeg ua haujlwm tseem ceeb dua.
Vim tias lawv cov viscosity qis dua, polyether polyols kuj muab kev ua haujlwm yooj yim dua hauv ntau qhov kev tsim khoom. Polyester polyols feem ntau yuav tsum tau ceev faj tswj kub ntau dua vim lawv cov viscosity siab dua.
Los ntawm qhov kev xav ntawm tus nqi, polyether polyols feem ntau pheej yig dua rau cov khoom loj - ntim, thaum polyester polyols yuav suav nrog cov nqi raw khoom ntau dua nyob ntawm kev tsim thiab daim ntawv thov.
Polyether polyols yog dav siv nyob rau hauv hloov pauv polyurethane ua npuas ncauj rau lub txaj thiab rooj tog zaum cushions, automotive zaum, thermal rwb thaiv tsev ntaub ntawv, cam khwb cia polyurethane elastomers, waterproof cov khoom, thiab cov khoom lag luam uas ua haujlwm nyob rau hauv qhov chaw ntub lossis sab nraum zoov.
Polyester polyols feem ntau yog siv nyob rau hauv industrial rollers, log, coatings, adhesives, sealants, rigid polyurethane cov khoom, cov khoom siv mining, thiab cov khoom siv tshuab uas yuav tsum muaj kev hnav tsis kam thiab lub zog txhua yam.
Yuav Ua Li Cas Xaiv Txoj Cai Polyol
Kev xaiv ntawm polyether polyol thiab polyester polyol nyob ntawm qhov chaw ua haujlwm thiab kev ua haujlwm zoo dua li xaiv ib qho khoom siv zoo dua.
Yog tias koj daim ntawv thov xav tau kev ua haujlwm zoo hydrolysis zoo, hloov tau yooj yim, thiab ntev - lub sijhawm ua haujlwm nyob rau hauv ntub lossis qis - qhov kub thiab txias, polyether polyol feem ntau yog qhov kev xaiv.
Yog tias qhov siab tshaj plaws txhua yam muaj zog, kev ua haujlwm tsis zoo, roj tsis kam, thiab kub tsis kam yog qhov tseem ceeb, polyester polyol tuaj yeem muab kev ua haujlwm zoo dua.
Ntau cov txheej txheem polyurethane qib siab kuj tseem sib xyaw ua ke sib txawv polyol thev naus laus zis kom ua tiav qhov kev pom zoo ntawm lub cev, ua haujlwm ntev, thiab ua haujlwm zoo.
Raws li ib tug kws tshaj lij polyurethane raw khoom chaw tsim tshuaj paus, peb muab siab - zoo polyether polyols, polyester polyols, polyurethane prepolymers, thiab customized polyurethane systems rau cov neeg muas zaub thoob ntiaj teb.
Txawm hais tias koj qhov project cuam tshuam nrog polyurethane elastomers, hloov tau yooj yim ua npuas ncauj, muaj cov menyuam yaus, cov khoom siv mining, coatings, adhesives, lossis lwm yam kev siv polyurethane, peb pab neeg ua haujlwm tuaj yeem pom zoo cov tshuaj polyol uas tsim nyog raws li koj cov kev xav tau thiab cov txheej txheem ntau lawm.