Polyimide, e pota-potiloeng ke lisebelisoa tsa polymer, e tsositse thahasello ea litsi tse ngata tsa lipatlisiso Chaena, 'me likhoebo tse ling le tsona li se li qalile ho hlahisa - thepa ea rona ea polyimide.
I. Kakaretso
E le thepa e khethehileng ea boenjiniere, polyimide e 'nile ea sebelisoa haholo ho lifofane, sefofane, microelectronics, nanometer, kristale ea metsi, lera la karohano, laser le masimo a mang.Haufinyane tjena, linaha li thathamisa lipatlisiso, nts'etsopele le ts'ebeliso eapolyimidee le e 'ngoe ea lipolasetiki tsa boenjiniere tse tšepisang ka ho fetisisa lekholong la bo21 la lilemo.Polyimide, ka lebaka la litšoaneleho tsa eona tse hlahelletseng ts'ebetsong le ts'ebetsong, ebang e sebelisoa e le thepa ea meralo kapa e le lisebelisoa tse sebetsang, litebello tsa eona tse kholo tsa ts'ebeliso li se li lemohuoe ka botlalo, 'me e tsejoa e le "setsebi sa ho rarolla mathata" ( protion solver. ), 'me o lumela hore "ntle le polyimide, ho ka be ho se na theknoloji ea microelectronics kajeno".
Ea bobeli, ts'ebetso ea polyimide
1. Ho ea ka tlhahlobo ea thermogravimetric ea polyimide e nkhang hamonate ka ho feletseng, mocheso oa eona oa ho bola hangata o pota 500 ° C.Polyimide e entsoeng ho tloha biphenyl dianhydride le p-phenylenediamine e na le mocheso oa ho bola oa mocheso oa 600 ° C 'me ke e' ngoe ea li-polymer tse tsitsitseng ka ho fetisisa ho fihlela joale.
2. Polyimide e ka mamella mocheso o tlase haholo, joalo ka mokelikeli oa helium ho -269 ° C, e ke ke ea brittle.
3. Polyimidee na le lisebelisoa tse ntle tsa mochini.Matla a matla a polasetiki a sa tlatsoang a ka holimo ho 100Mpa, filimi (Kapton) ea homophenylene polyimide e ka holimo ho 170Mpa, le biphenyl type polyimide (UpilexS) ho fihlela ho 400Mpa.Joaloka polasetiki ea boenjiniere, boholo ba filimi ea elastic hangata ke 3-4Gpa, 'me fiber e ka fihla 200Gpa.Ho ea ka lipalo tsa theoretical, fiber e entsoeng ke phthalic anhydride le p-phenylenediamine e ka fihla 500Gpa, ea bobeli ho ea ho carbon fiber.
4. Mefuta e meng ea polyimide ha e qhibilihe ka har'a metsoako ea tlhaho 'me e tsitsitse ho hlapolla acid.Mefuta e akaretsang ha e hanyetsane le hydrolysis.Khaello ena e bonahalang e haella e etsa hore polyimide e fapane le lipolima tse ling tse sebetsang hantle haholo.Sebopeho ke hore dianhydride tse tala le diamine li ka fumanoa ka alkaline hydrolysis.Ka mohlala, bakeng sa filimi ea Kapton, tekanyo ea ho hlaphoheloa e ka fihla ho 80% -90%.Ho fetola sebopeho ho ka boela ha fumana mefuta e hanyetsanang le hydrolysis, joalo ka ho mamella 120 ° C, lihora tse 500 tsa ho belisa.
5. Mocheso oa katoloso ea mocheso oa polyimide ke 2×10-5－3×10-5℃, Guangcheng thermoplastic polyimide ke 3×10-5℃, mofuta oa biphenyl o ka fihla ho 10-6℃, mefuta e fapaneng e ka ba ho fihlela ho 10- 7°C.
6. Polyimide e na le khanyetso e phahameng ea mahlaseli, 'me filimi ea eona e na le matla a ho boloka matla a 90% ka mor'a 5 × 109radiation e potlakileng ea elektronike.
7. Polyimidee na le thepa e ntle ea dielectric, e nang le "dielectric constant" e ka bang 3.4.Ka ho hlahisa fluorine kapa ho hasanya li-nanometers tsa moea ho polyimide, "dielectric constant" e ka fokotsoa hore e be hoo e ka bang 2.5.Tahlehelo ea dielectric ke 10-3, matla a dielectric ke 100-300KV/mm, Guangcheng thermoplastic polyimide ke 300KV/mm, ho hanyetsa molumo ke 1017Ω/cm.Thepa ena e lula e le boemong bo phahameng ho feta mocheso o pharaletseng le mefuta e mengata ea maqhubu.
8. Polyimide ke polima e itimang e nang le sekhahla se tlase sa mosi.
9. Polyimide e na le khase e fokolang haholo tlas'a vacuum e phahameng haholo.
10. Polyimide ha e na chefo, e ka sebelisoa ho etsa tableware le lisebelisoa tsa bongaka, 'me e khona ho mamella likokoana-hloko tse likete.Li-polyimides tse ling le tsona li na le biocompatibility e ntle, mohlala, ha li na hemolytic tekong ea tšebelisano ea mali 'me ha li na chefo tekong ea in vitro cytotoxicity.
3. Mekhoa e mengata ea ho kopanya:
Ho na le mefuta le mefuta e mengata ea polyimide, 'me ho na le mekhoa e mengata ea ho e kopanya, kahoo e ka khethoa ho latela merero e fapaneng ea ts'ebeliso.Mofuta ona oa ho feto-fetoha ha maemo ho kopantseng le ona ho thata hore li-polymer tse ling li be le tsona.
1. Polyimidee entsoe haholo ho tsoa ho dibasic anhydrides le diamine.Li-monomers tsena tse peli li kopantsoe le li-polymer tse ling tse ngata tsa heterocyclic, tse kang polybenzimidazole, polybenzimidazole, polybenzothiazole, polyquinone Ha li bapisoa le li-monomers tse kang phenoline le polyquinoline, mohloli oa lisebelisoa tse tala o pharaletseng, 'me motsoako le oona o bonolo.Ho na le mefuta e mengata ea dianhydrides le diamine, 'me polyimides e nang le thepa e fapaneng e ka fumanoa ka metsoako e fapaneng.
2. Polyimide e ka ba polycondensed ka mocheso o tlase ka dianhydride le diamine ka har'a motsoako oa polar, joalo ka DMF, DMAC, NMP kapa THE/methanol motsoako oa motsoako, ho fumana soluble polyamic acid, ka mor'a hore filimi e thehoe kapa ho ohla Ho futhumala hoo e ka bang 300 ° C bakeng sa dehydration le cyclization ho polyimide;acetic anhydride le tertiary amine catalysts le tsona li ka ekeletsoa ho polyamic acid bakeng sa ho felloa ke metsi lik'hemik'hale le cyclization ho fumana tharollo ea polyimide le phofo.Diamine le dianhydride li ka boela tsa futhumatsoa 'me tsa kenngoa ka polycondensed sebakeng se phahameng se belang se qhibilihisang, se kang phenolic solvent, ho fumana polyimide ka mohato o le mong.Ho phaella moo, polyimide e ka boela ea fumanoa ho tloha karabelo ea dibasic acid ester le diamine;e ka boela ea fetoloa ho tloha ho polyamic acid ho ea ho polyisoimide pele, ebe ho ea ho polyimide.Mekhoa ena kaofela e tlisa boiketlo ho sebetsa.Ea pele e bitsoa mokhoa oa PMR, o ka fumanang viscosity e tlaase, tharollo e tiileng e phahameng, 'me e na le fensetere e nang le viscosity e tlaase ea ho qhibiliha nakong ea ts'ebetso, e leng e loketseng ka ho khetheha bakeng sa ho etsa lisebelisoa tse kopantsoeng;ea ho qetela e eketseha E le ho ntlafatsa solubility, ha ho na metsoako e tlaase ea limolek'hule e lokolloa nakong ea phetoho.
3. Hafeela bohloeki ba dianhydride (kapa tetraacid) le diamine bo tšoaneleha, ho sa tsotellehe hore na ke mokhoa ofe oa polycondensation o sebelisoang, ho bonolo ho fumana boima ba molek'hule bo lekaneng, 'me boima ba molek'hule bo ka fetoloa habonolo ka ho eketsa unit anhydride kapa unit amine.
4. Polycondensation ea dianhydride (kapa tetraacid) le diamine, hafeela tekanyo ea molar e fihla ka tekanyo e lekanang, phekolo ea mocheso ka har'a vacuum e ka eketsa haholo boima ba limolek'hule tsa prepolymer e tiileng e tlaase ea limolek'hule, kahoo e ntlafatsa ho sebetsa le ho etsa phofo.Tloho ha bonolo.
5. Ho bonolo ho kenyelletsa lihlopha tse sebetsang hantle qetellong ea ketane kapa ketane ho theha li-oligomers tse sebetsang, kahoo li fumana thermosetting polyimide.
6. Sebelisa sehlopha sa carboxyl ho polyimide ho etsa esterification kapa letsoai, le ho hlahisa lihlopha tsa li-photosensitive kapa lihlopha tsa alkyl tsa nako e telele ho fumana li-polymers tsa amphiphilic, tse ka sebelisoang ho fumana li-photoresists kapa ho sebelisoa ha ho etsoa lifilimi tsa LB.
7. Mokhoa o akaretsang oa ho kopanya polyimide ha o hlahise matsoai a sa tloaelehang, a molemo ka ho khetheha bakeng sa ho lokisoa ha lintho tse sireletsang.
8. The dianhydride le diamine e le monomers li bonolo ho li theola tlas'a vacuum e phahameng, kahoo ho bonolo ho e etsa.polyimidefilimi holim'a li-workpieces, haholo-holo lisebelisoa tse nang le bokaholimo bo sa lekanang, ka ho beha mouoane.
Nako ea poso: Feb-06-2023