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Litšobotsi le likopo tsa polyimide (pi)

November 04, 2024
Polyimide (polyimide Mocheso oa eona o phahameng o hanyetsanang le ho sebelisa mocheso o mongata oa mocheso o fetang 400 ° C, karolo ea ntlha ea ho qhibiliha, 103 hz) ~ 0,007, ke F ho H Class Docub.
Polasetiki e hony e ka fana ka polasetiki e phahameng haholo ea koetliso ea boenjiniere, e felisitsoeng, e nang le lits'oants'o tsa mocheso, ka ho hanana le liqhomane tsa moreki ho latela lipere tsa mocheso tse 260 ℃, 350 ℃ le ka holim'a ka ho latellana. Polyimide e ka eketsoa ka seriba sa Molybedenum, Graphite, Carbon Fiber, ea Pholo-ea Peobethylene, ETC.
Polyimide PI e na le khanyetso e phahameng le e tlase ea mocheso (-269 ~ , eseng chel chel, joalo-joalo e sa laoleheng ke lipopae tse ling tse khethehileng tsa boenjhane. Ts'ebetso ea eona e felletseng e boetse e batsise ho tse ling tse ikhethang.
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Polyimide e nang le mefuta e mengata ea polyimide ke mefuta ea homophmide e holofetseng, ether ohthd pocemide, imemide ime hyhdride polydride poleimide. Har'a bona, homopolymer polyimide ke moemeli oa polycondenside. Leha ho le joalo, ha e inngoene le ho nyenyefatsa, 'me ho thata ho e etsa. Hangata ho ka sebelisa mokhoa oa phofo oa phofo feela ka lihlahisoa tsa polasetiki tsa phofo, kapa ts'ebeliso ea ho se sebetse kapa mokhoa oa ho lahla ho kena filiming. Mohlala, lesela la khalase le kentsoeng ka tharollo ea polyamide acid e hatisoa e chesa lishiti. Ho fapana le moo, mofuta oa Ahhdride Anhhydride o phofmiride e le polao ea ts'ebetso ea ho bopa e ntlafalitsoeng haholo. E ke ke ea senyeha feela, empa e ka ntlafala le ho iphelisa le mekhoa e meng ea ho bopa, e ka hatisoa le ho lahla mokhoa oa ho etsa filimi.
Classified
PolyCondenSassication
Li-polyentara tsa mofuta o monate li hlahisoa ka lijo tse tsamaeang ka moea tse nang le monko o monate oa lipalesa tse monko o monate, acid acid dialkyl esters. Kaha synthes of Polycondences e etselitsoeng pokontimi e belang e phahameng e se e entsoe ka li-dontylfronide, jj. Nakong ea boitokisetso ba pele, 'me ba tšoasehang nakong ea ho liha ha cyclizations ea poli ea polimamide, e nang le li-pores tse bonolo ho lihlahisoa tse kopaneng. Sena se nolofalletsa ho hlahisa lipere ho lihlahisoa tse kopaneng, 'me ho thata ho fumana thepa ea boleng bo holimo ea boleng bo holimo ntle le pores. Ka hona, polycondentencension e se e sebelisoa e le thepa ea lisebelisoa tsa motlakase, haholoholo ho etsa lifilimi tsa polao le makhapetla a polao a pohliloeng
Polymeriation
Ha polycondenside e na le litlamorao tse boletsoeng kaholimo, e le hore li ka hlola mefokolo ena, e le hore motho a tšoeroe ke polymerization. Tse ling tsa mantlha tse sebelisoang haholo ke polybiismaleimide le a Norcatneone-caped-caped-caped-caped-caped-caped-caped Hangata batho bana ba bangata ke boima bo fokolang ba bilymides ba pongimisides ka lihlopha tse sa tsejoeng qetellong, ebe bo kenngoa ka lihlopha tse sa hlonepheng ha li sebelisoa.
(1) polybiismaleimide
Polybiisaleimide e etsoa ke polycondenentation of athing anhydride le a gumine ea monko o monate. E hahiloe e le mothapo o mong, empa ts'ebetso ea Synthesis e bonolo, ho ba bonolo ho e sebelisa, e ka etsoa habonolo feela lihlahisoa tse fapaneng tsa koporo. Empa lisebelisoa tse halikiloeng li ntse li blottle haholo.
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E 'ngoe ea tse bohlokoa ka ho fetisisa ke sehlopha sa PMR (bakeng sa Insumu Pelmerization ea linomere, limpho tsa polymerication) tsa lipatlisiso tsa lipatlisiso tsa Nasa Lewis. Li-Resimmer tsa PMR li thaepa pokomiti 5-Noruzyne-2,-dicarboxyy acid Monoalkyl esters. 3-dicarboxylic acid monomers such as alkyl esters of aromatic tetracarboxylic acids, aromatic diamines, and monoalkyl esters of 5-norbornene-2, 3-dicarboxylic acid are dissolved in an alkyl alcohol (eg, methanol or ethanol) to produce a solution that can sebelisoa ka kotloloho ho likhoele tse sa sebetseng.
Li-subclasss
Polymides e ka aroloa ka mekhahlelo e mene: Homopanyle Pi, ITIID (PAI).
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Ho thusa ho feto-fetoha, ho hlafuna ho na le mekhoa e mengata. Ka ntlafatso ea phetoho, likhoele tsa khalase, likhoele tsa Boron, likhoele tsa khabone le mabala a tšepe a ka eketsoa. Matlafatso ena e ka fokolisa ka mokhoa o lekaneng ea kholo ea polao ea polao, e ntlafatsa matla, ha e fokotsa litšenyehelo. Ka mohlala, etsa liphetoho tse phahameng tse hlahisoang ke sebopeho, kamora ho ntlafatsa polao e lokiselitsoeng ho ka mamella mojaro o moholo.
Phello ea sejali e hlalosang Isorganic, Graphite, Molybetenude, kapa Polysteenum Distaeneethyoeth, e ntlafatsang litšenyehelo tsa eona. Khauta ea cinging co-Cingling le eona e na le mokhoa oa bohlokoa oa ho fetola, polyurethane le polyuretramora le polystetraper.
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Ts'ebetso
1, e ile ea hlahlojoa ka hohle-hohle ka tlhahlobo ea Thermogravimetrist Polyimide Synthesided ke Homofthalize Asiti ea Limofor
2, Polyimide e ka mamella lithemparetjha tse tlase haholo, tse kang -269 ℃ ka har'a helium ea metsi a ke ke a ba brittle.
3, Polyimide e na le thepa e ntle ea polasi ea polasetiki e fetang 100mpa e fetang 170mpa. le biehenylene-Thise polemimide (inilex s) e fihla ho 400Ma. joalo ka polante ea boenjiniere. Modulusis oa Elastic ke makhetlo a 3-4GPA, fiber e ka fihla 200gpa acidride le P-pheny e entsoe ka li-diahydride le P-zenyleamiane, ea bobeli feela ea ho khaba fiber ea khabone.
4, mefuta e meng ea polyimeide e sa khathatsehe ka li-solvents tsa manyolo, litsietso tse tsitsitseng, haholo mefuta ea ts'ebetso ea polao e fapaneng, e leng tšobotsi e kholo haholo, Ka mantsoe a mang, alkaline hydrolysis e ka sebelisoa ho fumana lisebelisoa tse tala, joalo ka fiareride le Diamine, joalo ka filimi ea Kapton, e leng sekhahla -90%. Fetola sebopeho se ka fumana khafetsa ho mefuta ea hyddlysis, e kang ho mamella lihora tse 500 tsa ho chesa.
5, Polyimide e na le sebono sa solube, ho ea ka sebopeho sa mefuta e fapaneng, ba bang ba batla ba sa fetohe li-solvey tsa manyolo, tse kang tetrarahful le Tolunol.
6, ka setotsoana se ke keng sa lekana ha pormal ka 2 × 10-5 / × × × 10-5 / × × 10,5 / ℃, mefuta e mengata ho isa ho 10- 7 / ℃.
7, Polyimide e na le khanyetso e phahameng ea ho se nke lehlakore, filimi ea eona ho 5 × 109rad e sebetsa ka potlako ea elektrone
8, Polyimide e na le mekhoa e metle ea lefu la tsoekere, e le phetoho ea lijo tsa mantsiboea Tahlehelo ea Diectic ea 10-3, matla a ho etsa joalo a 100-300kv / mm, ha ho ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha ha hamile. Mesebetsi ena ea thepa e fapaneng ea mocheso le khafetsa e ntse e bolokoa boemong bo phahameng.
9, Polyimide ke polymer ea tsoang botebong ba pelo, sekhahla se tlase.
10, Hlakola ka vacuum e phahameng haholo e sa tsotelloe haholo.
11, Polyimide e seng ea chefo, e ka sebelisoa ho etsa doorware le liletsa tsa bongaka, 'me e mamella liketsahalo tse likete tsa thipa. Ka mohlala, hlakometso e 'ngoe hape e na le bo-biocompatide e ntle ea biockatide ea mali bakeng sa batho ba se nang hemolytic, ka tlhahlobo ea vitro cy-cy-cy-cy-cy-cum ea ho se chefo.
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Lits'ebetso tse tloaelehileng li kenyelletsa:
(1) Likarolo tse nang le litlolo tse tlase li lekana le ho hanyetsa ka lebelo le phahameng le khatello e phahameng;
(2) Likarolo tse nang le khanyetso e ntle haholo ho phofo kapa polasetiki ea polasetiki;
(3) Boithati bo ikhethang ba ho ikhatholla kapa ba oli ea lebese;
(4) mocheso o phahameng le khatello tlasa likaroloana tse qaqileng tsa metsi;
(5) Ho hanyetsa phahameng ho hanyetsa, ho otlolla letsoho le likarolo tse phahameng tsa ho hanyetsa;
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(7) Ts'ebeliso ea mocheso e telele e fetisa 300 ℃ kapa ho feta, nako e khuts'oane ho fihlela likarolo tse 400 ~ 450;
(8) Mocheso o phahameng (ho feta 260 ℃) Kamano e fetotsoeng ea Epolosen
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