Titanate coupling agents, raws li ib chav kawm ntawm functional additives nyob rau hauv titanium atoms, tsim ib tug npaum interfacial choj ntawm inorganic fillers thiab organic polymers. Lawv cov yam ntxwv tshwj xeeb tau ua rau lawv siv dav hauv cov ntaub ntawv sib xyaw, txheej, roj hmab, thiab lwm yam. Kev nkag siab tob txog cov yam ntxwv no pab kom paub txog lawv cov peev xwm ua tau zoo hauv kev tsim khoom thiab R & D.
Ua ntej, cov qauv molecular endows lawv nrog dual affinity. Titanate coupling agents muaj xws li lub hauv paus titanium atom, ester pawg segments, thiab davhlau ya nyob twg ua haujlwm pab pawg. Lub titanium atom tuaj yeem tsim kev sib koom ua ke lossis cov khoom siv tshuaj lom neeg nrog cov pawg polar xws li hydroxyl pawg ntawm qhov chaw muab tub lim, ua kom muaj zog anchoring. Cov pab pawg ester thiab cov pab pawg ua haujlwm hauv davhlau ya nyob twg, raws li lawv cov qauv sib txawv, nthuav qhia kev sib raug zoo thiab kev cuam tshuam nrog ntau hom organic matrices. Ntev- pawg alkyl pab txhim kho kev sib raug zoo nrog cov tsis yog-cov polar resins xws li polyolefins, cov pa roj carbon monoxide muaj zog ua kom muaj kev sib raug zoo nrog cov yas yas, thiab cov pab pawg ua haujlwm muaj peev xwm koom nrog cov tshuaj tiv thaiv polymerization los tsim cov ntawv cog lus, ua tiav qhov ruaj khov "inorganic-organic" crossages {{7.}}
Secondly, lawv reactivity yog tunable thiab adaptable heev. Nyob ntawm lawv cov qauv ester, titanates tuaj yeem muab faib ua monoalkoxy, chelate, thiab kev sib koom ua ke, txhua tus muaj nws tus kheej tseem ceeb ntawm kev ua ub no thiab huab cua tsis kam. Monoalkoxy hom muaj cov tshuaj tiv thaiv sai, ua rau lawv haum rau qis- kub, luv- ua; chelate hom, vim yog kev taw qhia ntawm cyclic ligands los thaiv qhov chaw nquag, txhim kho hydrolysis tsis kam thiab thermal stability, ua rau lawv haum rau cov av noo lossis siab - qhov kub thiab txias; pyrophosphate hom sib xyaw bidentate kev sib koom tes thiab dej tsis kam, nthuav dav lawv daim ntawv thov nyob rau hauv cov xwm txheej hnyav. Los ntawm kev tsim qauv molecular, lawv tuaj yeem hloov kho kom haum rau cov txheej txheem sib txawv thiab kev pabcuam ib puag ncig.
Thirdly, lawv muaj kev sib koom ua haujlwm siab thiab muaj txiaj ntsig zoo sib xws. Titanate coupling cov neeg ua haujlwm tsis tsuas yog txhim kho cov khoom sib cais, txo cov kab mob viscosity, thiab txhim kho kev ua haujlwm, tab sis kuj tseem txhim kho cov khoom siv sib xyaw ua ke (xws li tensile zog thiab cuam tshuam toughness), kub tsis kam, thiab huab cua tsis kam ntawm cov khoom sib xyaw. Lawv cov kev hloov pauv cuam tshuam tuaj yeem txo qis kev ntxhov siab, ncua kev nthuav tawm tawg, thiab ua kom lub ntsej muag thiab kev ua haujlwm ruaj khov ntawm cov khoom siv sijhawm ntev -.
Plaub, lawv hloov tau yooj yim hauv kev siv thiab kev lag luam. Titanate esters tuaj yeem siv rau hauv cov txheej txheem qhuav lossis ntub dej ua ntej, thiab tseem tuaj yeem raug ntxiv ncaj qha rau cov khoom sib xyaw lossis cov tshuaj tov sib xyaw, nthuav tawm cov txheej txheem muaj zog sib xws. Kev tswj kom muaj nuj nqis tsim nyog (feem ntau 0.5% -3% ntawm qhov muab tub lim) tuaj yeem ua tiav qhov kev hloov kho zoo tshaj plaws, zam cov khoom pov tseg thiab kev ua haujlwm tsis zoo los ntawm kev sib ntxiv ntau dhau.
Zuag qhia tag nrho, titanate ester coupling cov neeg ua haujlwm, nrog rau lawv cov yam ntxwv tseem ceeb ntawm kev tsim qauv tsim, kev ua haujlwm tswj tau, kev ua haujlwm sib txawv, thiab cov txheej txheem hloov kho, tau dhau los ua cov kev daws teeb meem zoo tshaj plaws rau kev daws cov teeb meem inorganic -organic interface incompatibility teeb meem, ua si lub luag hauj lwm irreplaceable nyob rau hauv kev txhawb nqa kev ua tau zoo thiab lightweighting ntawm cov ntaub ntawv sib xyaw.
