Polyimide (PI) yog lub npe hu ua "kub zaj duab xis" vim nws cov kev ua tau zoo heev, xws li thermal stability, tshuaj stability thiab mechanical zog, thiab yog dav siv nyob rau hauv aviation, aerospace, microelectronics, electronics, hluav taws xob thiab lwm yam kev lag luam. Raws li ib tug tswv cuab ntawm PI tsev neeg, PI zaj duab xis tsis yog tsuas yog cov khoom lag luam ntxov tshaj plaws, tab sis kuj muaj ntau tshaj li 70% ntawm cov khoom lag luam, dhau los ua cov khoom lag luam ntawm Tuam Tshoj txoj kev lag luam polyimide.
PI zaj duab xis raws li xim thiab kev ua tau zoo tuaj yeem muab faib ua PI zaj duab xis dub, xim av PI zaj duab xis, pob tshab PI zaj duab xis thiab corona resistant PI zaj duab xis thiab lwm yam. Ntawm lawv, ntxiv rau cov yeeb yaj kiab PI dub, cov yeeb yaj kiab ntxiv feem ntau yog tsim los ntawm cov txheej txheem tshuaj mine, thiab feem ntau yog siv hauv kev lag luam high-end. Txawm li cas los xij, vim muaj zog nqus cov khoom ntawm PI zaj duab xis nyob rau hauv qhov pom ntau yam vim muaj kev cuam tshuam ntawm intermolecular CTC (electron transfer complex), nws qhia tau hais tias cov xim tsaus, uas txwv tsis pub siv ntau yam ntawm PI zaj duab xis hauv cov cuab yeej siv rau qee yam.
Txhawm rau kov yeej qhov kev txwv no, cov kws tshawb fawb tau ua haujlwm los tsim ib hom tshiab ntawm Polyimide, Colorless Polyimide (CPI). Cov khoom no tsis tsuas yog tswj hwm qhov kub thiab txias tsis kam, huab cua tsis kam, zoo heev txhua yam thiab lub cev ntawm PI, tab sis kuj muaj qhov tsis tshua muaj hluav taws xob tsis tu ncua thiab coefficient ntawm thermal expansion (CTE), thiab qhov tseem ceeb tshaj, nws kov yeej cov opacity ntawm cov tsoos PI zaj duab xis, ua ib qho tseem ceeb xaiv cov khoom siv rau cov khoom xws li hloov tau cov lus qhia uas yuav tsum tau kub kuj, huab cua kuj, transparency, thiab bendability.
Ob yam khoom siv tseem ceeb yog Pyromellitic acid (PMDA) thiab 4,4'-diaminodiphenyl ether (ODA) los tsim cov yeeb yaj kiab PI zoo, tshwj xeeb tshaj yog cov pob tshab PI films lossis CPI rau kev ua lag luam siab. Raws li tus neeg muag khoom ntawm ob qho tseem ceeb tshuaj raw cov ntaub ntawv, peb lub tuam txhab nkag siab qhov tseem ceeb ntawm PI zaj duab xis kev ua tau zoo thiab tau cog lus los muab siab purity thiab zoo ib yam zoo PMDA thiab ODA los txhawb peb cov neeg muas zaub hauv kev tsim PI zaj duab xis khoom nrog superior kev ua tau zoo.
Txawm hais tias nws yog rau thaj chaw aerospace lossis kev lag luam khoom siv hluav taws xob, PI zaj duab xis thiab nws cov derivatives yog niaj hnub tsav kev tshawb fawb thiab thev naus laus zis. Raws li ib tus neeg muab kev ntseeg siab ntawm PMDA thiab ODA, peb ntseeg ruaj khov tias los ntawm kev tsim kho thev naus laus zis thiab kev koom tes txuas ntxiv, peb tuaj yeem qhib qhov kev cia siab dav dav rau daim ntawv thov PI zaj duab xis.