Raws li chav kawm ntawm organometallic compounds nyob rau hauv titanium atoms, daim ntawv thov cov nyhuv ntawm titanate coupling agents yog ze ze rau lawv ib puag ncig.Defining qhov chaw siv tsis tau tsuas yog txhawj txog lawv tus kheej tshuaj stability tab sis kuj ncaj qha cuam tshuam rau lawv cov dej num thiab ntev - lub sij hawm kev cia siab rau hauv interfacial hloov kho. Yog li ntawd, kev nkag siab zoo ntawm lawv qhov ntsuas kub, av noo, tshuaj lom neeg tshaj tawm, thiab cov txheej txheem ua haujlwm yog qhov tseem ceeb rau kev xaiv kom raug thiab daim ntawv thov ruaj khov.
Los ntawm qhov kev xav ntawm qhov kub thiab txias, titanate coupling agents feem ntau muaj kev ua haujlwm zoo nyob rau hauv thaj tsam ntawm chav tsev kub mus rau nruab nrab {{0} kub kub, nrog rau kev ua haujlwm kub ntawm 80℃mus rau 200℃. Qee qhov siab -kub resistant hloov ntau yam tuaj yeem tswj tau cov qauv kev ncaj ncees thiab muaj peev xwm sib txuas ntawm lub ntsej muag ntawm qhov kub siab dua. Nyob rau hauv qhov chaw qis - qhov kub thiab txias, qee hom uas muaj ntev - cov saw alkyl pawg lossis siab - melting- cov pawg ester tej zaum yuav muaj kev nce viscosity los yog ib feem ntawm crystallization, yuav tsum tau preheating los yog nplawm ua ntej ua kom rov qab fluidity, tab sis qhov no tsis cuam tshuam rau lawv cov tshuaj lom neeg. Siv nyob rau hauv qhov kub thiab txias tsis tu ncua los yog thermal shock sai yuav tsum tau zam kom tsis txhob oxidation ntawm titanium chaw lossis tawg ntawm cov organic ntu, ua rau kev ua haujlwm tsis zoo.
Cov av noo yog ib qho tseem ceeb uas yuav tsum tau xav txog thaum siv titanate coupling agents. Cov coupling agents no rhiab heev rau cov dej noo thiab nkag mus rau hydrolysis hauv dej los yog siab -cov av noo ib puag ncig, tsim dej cawv thiab titanate oligomers, yog li ua rau lawv tsis muaj peev xwm sib txuas nrog rau qhov chaw muab tub lim. Yog li ntawd, thaum lub sij hawm cia thiab ua, ib puag ncig yuav tsum tau khaws cia kom qhuav li sai tau, nrog cov txheeb ze humidity tswj nyob rau theem qis; Cov khoom siv dehumidification los yog qhov chaw kaw, qhuav yuav tsum tau siv yog tias tsim nyog. Thaum siv dej- muaj cov fillers lossis matrices, pretreatment dehydration los yog xaiv cov chelated los yog monoalkoxy titanates tuaj yeem txhim kho hydrolysis tsis kam.
Hais txog cov tshuaj ib puag ncig, titanate coupling agents yuav tsum tsis txhob sib cuag ncaj qha nrog cov acids muaj zog, muaj zog hauv paus, thiab muaj zog oxidants, vim tias cov xov xwm no tuaj yeem cuam tshuam titanium -oxygen bonds lossis organic functional group, ua rau decomposition lossis deactivation. Lawv muaj kev sib raug zoo nrog cov ntaub ntawv polymer (polyolefins, engineering plastics, roj hmab, thiab lwm yam), tab sis cov kev xav sab nraud yuav tsum raug soj ntsuam hauv cov tshuab uas muaj cov amino pawg nquag, mercapto pawg, lossis hydrolyzable silanes. Tsis tas li ntawd, lawv yuav tsum tsis txhob nyob ntev -lub sij hawm nrog cov tshuab uas yooj yim ua rau hlau-catalyzed degradation los tiv thaiv kev tawg ntawm titanium ion catalytic saw.
Kev ua haujlwm ib puag ncig kuj cuam tshuam rau lawv qhov kev ua tau zoo. Nyob rau hauv cov txheej txheem xws li sib tov, extrusion, thiab txhaj tshuaj molding, cov cuab yeej yuav tsum tau ceev kom huv si thiab tsis muaj residual ya raws thiab impurities kom tsis txhob cuam tshuam nrog cov kev taw qhia kev sib raug zoo ntawm tus neeg sawv cev coupling ntawm lub interface. Rau cov kab ntau lawm, nws raug nquahu kom tswj cov khoom siv nyob hauv lub sijhawm thiab kev siv lub zog kom tso cai rau tus neeg sawv cev sib txuas lub sijhawm txaus los ua kom tiav cov kev sib tshuam ntawm lub ntsej muag yam tsis muaj kev puas tsuaj los ntawm kev shearing ntau dhau.
Hauv cov ntsiab lus, qhov tsim nyog ib puag ncig cov yam ntxwv ntawm titanate coupling cov neeg ua haujlwm yog: qhov dav ntawm qhov kub thiab txias adaptability ntau yam tab sis intolerant ntawm huab cua kub thiab thermal shock; tswj cov av nruj kom tiv thaiv hydrolysis; zam cov acids muaj zog, muaj zog alkalis, thiab muaj zog oxidants nyob rau hauv ib puag ncig tshuaj; thiab xyuas kom qhuav thiab huv si ua tej yam kev mob. Los ntawm kev sib piv ib puag ncig tsis zoo nrog cov yam ntxwv ntawm cov qauv molecular, lawv cov kev hloov pauv hloov pauv hauv cov yas, roj hmab, txheej txheej, thiab lwm cov tshuab tuaj yeem siv tau tag nrho, ua kom ntev -lub sij hawm ruaj khov ntawm cov khoom lag luam.
