Polyimide, da duka - mai zagaye a cikin kayan polymer, ya kawo ƙarin cibiyoyin bincike a cikin Sin, kuma wasu kamfanonin da aka fara samawa - kayan aikinmu na polyimifi.
I. Overview
A matsayin kayan injina na musamman, an yi amfani da polyimide sosai a cikin jirgin sama, Aerospacecronics, landomete, micretomronics, aerometer, crystal lu'ulu'u, laser da sauran filayen. Kwanan nan, ƙasashe suna jeri, ci gaba da amfani dapolyimideA matsayin daya daga cikin manyan hanyoyin motsa jiki na alkalami a cikin karni na 21. Polyimide, saboda fitattun halaye a cikin aiki da kira, ana amfani da shi azaman tsarin tsari ko kuma an san shi "(ba tare da masifa ba", ba tare da ƙarancin ƙwayoyin cuta ba, har yanzu ba za a sami ƙwayoyin cuta a yau ba ".
Na biyu, wasan kwaikwayon na polyimide
1. Kamar yadda yake na rubutun na thermoatic na cikakken m poriomatic polyimide, zazzabi na lalata yana kusa da 500 ° C. Polyimide ya hade daga Biphenyl diannhosine da p - Phenylediamine zazzabi na 600 ° C kuma yana daya daga cikin mafi girman polymers zuwa yanzu.
2. Polyimide iya jure da ƙarancin ƙarancin nauyi, kamar a cikin babban nauyium a - 269 ° C, ba zai zama da gaggautsa ba.
3.Polyimideyana da kyawawan kayan aikin injiniyoyi. Kwararrun makamashi mai cike da kersu sun sama sama da 100pta, fim (Kapton) na Polyimide Polyimide (UPLEXS) har zuwa 400pta. A matsayin filastik na injiniya, adadin fim na elange yawanci shine 3 - 4GPA, kuma fiber zai iya isa 200GPA. Dangane da lissafin ka'idoji, zaren da ke kwance karkatar da anhydride da p - Phenylediamine na iya kaiwa 500gpi, na biyu kawai zuwa carbon fiber.
4. Wasu nau'ikan polyimide sun kasance masu banƙyama a cikin abubuwan da ke tattare da su kuma barga ga tsarfin acid. Janar iri ɗaya ba sa yin tsayayya ga hydrolysis. Wannan gazawa mai yiwuwa ya sanya polyimide daban da sauran manyan - Polymers na aiki. Halin da aka halarta shi ne cewa albarkatun ƙasa dianhyride da diamine na iya dawo da diamine ta hanyar alkaline hydrolysis. Misali, don fim din Kapton, Acceimar Maidowa na iya kai 80% - 90%. Canza tsarin zai iya samun hydrolysis - iri iri, kamar su tsayayya 120 ° C, 500 na tafasa.
5. Matsakaicin madaidaicin yanayin zafin jiki shine 2 × 10 - 5 - 5 ℃, nau'in guangchenl na iya kaiwa 10 - 7 ° C.
6. Polyimide yana da juriya mai wadataccen salama, kuma fim ɗinsa yana da karancin cigaban ci 90% bayan 5 × 109Rad saurin iska mai sauri.
7.PolyimideYana da kyawawan kadarorin abinci, tare da allon kula da abubuwa kusan 3.4. Ta hanyar gabatar da filaye ko watsa kayan iska a polyimide, ana iya rage su akai-akai za'a iya rage zuwa kimanin 2.5. Mayar da matakai 10 - 3, ƙarfin sinadarai shine 100 - 300kv / mm, Guangchegnceng enmoplast shine 300kv / mm, Presera, cm. Waɗannan kaddarorin sun kasance a matakin farko akan babban kewayon zafin jiki da yawa.
8. Polyimide ne kai tsaye - ciyar da polymer tare da ƙarancin hayaƙi.
9. Polyimide yana da kadan fitar da fitar da matattara sosai.
10. Polyimide ba - mai guba ba, ana iya amfani dashi don yin kayan gado da kayan aikin likita, kuma zai iya jure dubunnan disinfections. Wasu plyimides kuma suna da kyakkyawan biochomptichiativity, alal misali, ba su bane - hemolytic a cikin gwajin karuwawar jini kuma ba masu guba a cikin gwajin Cytroxicity.
3. Hanyoyi da yawa na kira:
Akwai nau'ikan abubuwa da yawa da siffofin polyimide, kuma akwai hanyoyi da yawa don daidaita shi, saboda haka za'a iya ɗauka gwargwadon aikace-aikace da yawa daban-daban. Irin wannan sassauci a cikin kira kuma yana da wuya ga wasu polymers don mallaka.
1.Polyimidean fi dacewa da shi daga DiBasic Arhydrides da kuma kumburi. These two monomers are combined with many other heterocyclic polymers, such as polybenzimidazole, polybenzimidazole, polybenzothiazole, polyquinone Compared with monomers such as phenoline and polyquinoline, the source of raw materials is wide, and the synthesis is also relatively easy. Akwai nau'ikan dianhydries da yawa da kuma tubi, kuma polyimides tare da kaddarorin daban-daban ana iya samun su ta hanyar haɗuwa daban-daban.
2. Za a iya lalata polyimond a low zazzabi by dianhydride da dialydricic acid, don samun dumama polyamic, kamar yadda DMF, DMCHICSOL CIGABA DA KYAUTATA DA KYAUTATAWA DAGA CIKINSU. Hakanan za'a iya ƙara da polyamic amine mai ɗaukar hoto a cikin polyamic acid don ruwan shayarwar sunadarai da keke don samun mafita polyimide da foda. Hakanan za'a iya mai zafi dihine da Dianhhyride a cikin babbar tafasasshen ra'ayi, irin su phenolologica sauran ƙarfi, don samun polyimide a mataki ɗaya. Bugu da kari, ana iya samun polyimide daga dauki na Dibasic acid etter da diamine; Hakanan za'a iya canzawa daga polyamic acid zuwa polyisoimide farko, sannan kuma zuwa polyimide. Waɗannan hanyoyin duk sun dace don aiki. Tsohon ana kiransa hanyar PMR, wanda zai iya samun karancin danko, mai saurin bayani, kuma yana da taga tare da kariyar yawan narke yayin sarrafa kayan da aka sarrafa; A ƙarshen yana ƙaruwa don inganta ƙima, babu low - an fito da mahaɗan kwayoyin a yayin juyawa.
3. Muddin tsarkin Dianhhydride (ko Tetracid) da diamine sun cancanci daidaitawa, koda ana iya sauƙaƙe hanyar da aka isar da ita ta hanyar ƙara yawan ƙwayoyin cuta ko naúrar amine.
4. Polycondensation na Dianhhydride (ko Tetracid) da diamine, muddin da molar shine ya kara yawan nauyin kwayar halitta mai tsauri, ta yadda zai inganta aiki da foda. Zo dacewa.
5. Abu ne mai sauki ka gabatar da kungiyoyi masu sassauta a ƙarshen sarkar ko sarkar don samar da aiki mai aiki, don haka samun sararin samaniya polyimide.
6. Yi amfani da rukunin Carboxyl a cikin polyimide don aiwatar da daidaituwa ko samakkun gishiri, kuma gabatar da ƙungiyoyi masu hoto ko kuma amfani da su don samun masu daukar hoto ko a yi amfani dasu a cikin shirye-shiryen fina-finai.
7. Janar tsari na daidaitaccen kayan kwalliya baya haifar da kayan ado na ciki, wanda yake da amfani musamman ga shirye-shiryen sarrafa kayan.
8. Dilhydride da diamihine kamar yadda na Monomers suna da sauƙin tsara ƙarƙashin babban matattara, don haka yana da sauƙi don tsaripolyimideFim a kan wuraren aiki, musamman na'urori tare da abubuwan da ba a kwance ba, ta hanyar ajiya.
Lokaci: Feb - 06 - 2023