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Synthesis hawm Polyimide

Polyimide ntau, ntau haiv neeg lus, muaj ntau ntau txoj kev rau synthesis, vim li no yuav tau xaiv raws li connectivity kuj tsis paub meej txog kev, cov synthesis no kuj muaj lwm polymer yooj yim.

1. polyimide no mas muaj li ntawm ob yuan thiab ob yuan amine anhydride synthesis, qhov ob monomer thiab ntau lwm polymers heterocyclic, xws li polybenzimidazole, muaj polystyrene thiab ruam triazole, polybenzothiazole, poly Polyquinoline monomers, dav qhov uas muaj ntaub ntawv raw phen ruam thiab cov, lub synthesis los kuj yooj yim. Ob, ob amine anhydride polyimide ntau, ob peb ua ke ntau tau ncav kev kawm txawv.

2. polyimide yuav tau li ntawm ob lub anhydride thiab ob amines hauv kuab tshuaj ncov qaumteb qabteb, xws li, DMF, DMAC, NMP, lossis cov / uas kub thiab txias tsis xyaw polycondensation ib kuab tshuaj ntawm methanol, Staff polyamic kua qaub soluble, zaj duab xis-txoj kev ua los yog spinning tom qab cua kub rau 300 tawm ℃ lub cev qhuav dej cyclization rau hauv polyimide; kuj ntxiv tau acetic anhydride thiab tertiary amine catalysts los polyamide kua qaub yog tshuaj lom neeg lub cev qhuav, cyclization, muab polyimide kua thiab hmoov. Ob lub amines thiab ob anhydride tau kuj muaj nyob hauv siab kub point hnyav, xws li cov cua kub phenolic kuab polymerization, ib polyimide. Tsis tas li, kuj yeej tau polyimide ester plaub yuan ntawm ob yuan thiab ob yuan kev amine kua qaub; kuj yog ua los ntawm polyamide cov kua qaub ua ntej mus rau polyisoimide, thiab ces tom rau polyimide. Cov no muaj kev yooj yim rau kev ua, cov qub hu ua PMR txoj kev, yuav tau uas tsis muaj viscosity, tau hais haum siab, nrog lub qes yaj viscosity ntawm cov qhov rai qhov rooj, yog tsim tshwj xeeb rau manufacturing puas khoom; lub tom tw muaj solubility, nyob hauv tus txheej txheem transformation tsis emit molecular tebchaw tsawg kawg.

3. ntev li ob (los yog kua qaub plaub anhydride) chaw thiab purity ntawm ob amines, siv txawm polycondensation txoj kev, tsis yog yooj yim nrhiav tau siab sufficiently molecular phaus, nyob anhydride los yog amine tsev kuj yuav yooj yim heev uas tswj cov molecular nyhav ntxiv.

4. ua ob (los yog kua qaub plaub anhydride) thiab ob amine hws, ua ntev li ib tug hniav puas muab piv, kev kho cua sov hauv lub tshuab nqus tsev, yuav ua kom tsis tshua muaj ceeb thawj molecular molecules uantej polymer khoom kom muaj nuj nqis heev, sij coj zoojyim lwj thiab ua hmoov.

5. tau yooj yim nyob rau thaum xaus rau lub cia los cia rau hauv ib cov tshuaj tiv thaiv pab rau daim ntawv oligomer yam, uas ua rau thermosetting polyimides.

6. siv polyimide carboxyl, esterification los yog cov ntsev, tau lub amphiphilic polymer plaug ntev saw alkyl losis pawg photosensitive, yuav tau lub photoresist los rau LB lub ua zaj duab xis.

7. synthesis ntawm polyimide feem ntau tsis ua inorganic ntsev, cov khoom noj insulating yog ib qho feem ntau yog kev zoo.

soNorFifth, nplaim retardant ntawm tus kheej

Polyimide polymer Court quenching, haus luam yeeb yog tsawg kawg, lub cav nqus tsev siab outgassing tsis tshua; stability kub, nqus tsev siab thiab irradiation, neeg tsis mloog hais tej yam tsawg; qib nplaim retardant:

Thib rau, Polyimide tsis-mob toxic

Yuav siv rau qhov siv thiab ua tableware thiab cuab yeej siv kho mob, thiab ua kom tsis muaj menyuam txhiab mas ntawm npaug, ib co polyimide tau zoo biocompatibility. Piv txwv li, nyob hauv lub compatibility mus tshuaj ntsuam ntshav txog yam uas tsis yog tus mob hemolytic, cytotoxic hauv vitro thwmsim rau cov mob toxic. style = ntawv-txav tom ntej: 0; mso-sau: l0 level1 lfo1'10. Polyimide yog cov mob toxic, yuav muab siv rau qhov siv thiab ua tableware thiab cuab yeej siv kho mob, thiab tau txhiab zaus mas es ho. Muaj ntau tej polyimide tau zoo me compatibility, piv txwv, hauv cov ntshav compatibility xeem rau yam uas tsis yog tus mob hemolytic, cytotoxic hauv vitro thwmsim rau cov mob toxic.