ʻO Polyimide, ka mea holoʻokoʻa i nā mea polymer, ua hoʻāla i ka hoihoi o nā keʻena noiʻi he nui ma Kina, a ua hoʻomaka pū kekahi mau ʻoihana e hana - kā mākou mea polyimide ponoʻī.
I. Manao
Ma ke ʻano he mea hana ʻenehana kūikawā, ua hoʻohana nui ʻia ka polyimide i ka mokulele, aerospace, microelectronics, nanometer, crystal liquid, separation membrane, laser a me nā māla ʻē aʻe.I kēia mau lā, ke papa inoa nei nā ʻāina i ka noiʻi, hoʻomohala a me ka hoʻohana ʻanapolyimideʻo ia kekahi o nā plastics ʻenekinia maikaʻi loa i ke kenekulia 21.ʻO Polyimide, ma muli o kāna mau hiʻohiʻona koʻikoʻi i ka hana a me ka synthesis, inā hoʻohana ʻia ia ma ke ʻano he mea hana a i ʻole he mea hana, ua ʻike piha ʻia kāna mau noi noi nui, a ua ʻike ʻia ʻo ia he "mākaʻikaʻi hoʻoponopono pilikia" (protion solver. ), a manaʻoʻiʻo "me ka ʻole o ka polyimide, ʻaʻohe ʻenehana microelectronics i kēia lā".
ʻO ka lua, ka hana o ka polyimide
1. E like me ka thermogravimetric anaana o ka piha aromatic polyimide, kona decomposition wela maʻamau a puni 500°C.ʻO ka polyimide i hoʻohui ʻia mai ka biphenyl dianhydride a me ka p-phenylenediamine he mahana decomposition wela o 600°C a ʻo ia kekahi o nā polymers kūpaʻa loa i kēia manawa.
2. Hiki i ka Polyimide ke pale i ka wela haʻahaʻa loa, e like me ka helium wai ma -269 ° C, ʻaʻole ia e palupalu.
3. Polyimideloaʻa nā waiwai mechanical maikaʻi loa.ʻO ka ikaika tensile o nā plastic i hoʻopiha ʻole ʻia ma luna o 100Mpa, ke kiʻi (Kapton) o ka homophenylene polyimide ma luna o 170Mpa, a me ka biphenyl type polyimide (UpilexS) a hiki i 400Mpa.Ma ke ʻano he plastic engineering, ʻo ka nui o ka kiʻiʻoniʻoni elastic he 3-4Gpa, a hiki i ka fiber ke hiki i 200Gpa.Wahi a ka helu ʻana, hiki i ka fiber synthesized e phthalic anhydride a me p-phenylenediamine ke hiki i 500Gpa, ʻelua wale nō i ka fiber carbon.
4. ʻAʻole hiki ke hoʻoheheʻe ʻia kekahi mau ʻano polyimide i loko o nā mea hoʻoheheʻe organik a paʻa i ka dilute acids.ʻAʻole kūpaʻa nā ʻano maʻamau i ka hydrolysis.ʻO kēia hemahema ka mea e ʻokoʻa ai ka polyimide mai nā polymers hana kiʻekiʻe.ʻO ka hiʻohiʻona hiki ke hoʻihoʻi ʻia ka dianhydride maka a me ka diamine e ka alkaline hydrolysis.No ka laʻana, no ka kiʻi ʻoniʻoni ʻo Kapton, hiki i ka helu hoʻihoʻi ke hiki i 80% -90%.Hiki i ka hoʻololi ʻana i ka hale ke loaʻa nā ʻano hydrolysis-resistant, e like me ke kūpaʻa 120 ° C, 500 mau hola o ka paila.
5. ʻO ka helu hoʻonui wela o ka polyimide he 2 × 10-5－3 × 10-5 ℃, Guangcheng thermoplastic polyimide he 3 × 10-5 ℃, hiki i ke ʻano biphenyl ke hiki i 10-6 ℃, hiki i nā ʻano like ʻole ke piʻi i 10- 7°C.
6. He kiʻekiʻe ko Polyimide, a ʻo kāna kiʻiʻoniʻoni he 90% ikaika ma hope o 5 × 109rad wikiwiki electron irradiation.
7. PolyimideLoaʻa nā waiwai dielectric maikaʻi, me kahi mau dielectric ma kahi o 3.4.Ma ka hoʻokomo ʻana i ka fluorine a i ʻole ka hoʻopuehu ʻana i nā nanometer ea i ka polyimide, hiki ke hoʻemi ʻia ka dielectric mau i kahi 2.5.ʻO ka poho dielectric he 10-3, ka ikaika dielectric he 100-300KV / mm, Guangcheng thermoplastic polyimide he 300KV / mm, ka nui o ke kū'ēʻana he 1017Ω / cm.Ke noho nei kēia mau waiwai ma kahi kiʻekiʻe ma luna o kahi ākea ākea a me ka laulā.
8. ʻO ka Polyimide kahi polymer hoʻopau iā ia iho me ka haʻahaʻa o ka uahi.
9. He li'ili'i loa ka ho'oku'u 'ana o ka polyimide ma lalo o ka 'umehana ki'eki'e loa.
10. ʻO ka Polyimide he meaʻawaʻawaʻole, hiki ke hoʻohanaʻia e hana i ka papaʻaina a me nā mea lapaʻau, a hiki ke pale i nā tausani o nā disinfections.He biocompatibility maikaʻi kekahi o nā polyimides, no ka laʻana, he non-hemolytic lākou i ka hoʻāʻo ʻana i ke koko a ʻaʻohe mea ʻawaʻawa i ka hoʻāʻo in vitro cytotoxicity.
3. Nui nā ala o ka synthesis:
Nui nā ʻano a me nā ʻano o ka polyimide, a he nui nā ala e synthesize ia, no laila hiki ke koho ʻia e like me nā kumu noi like ʻole.He paʻakikī kēia ʻano maʻalahi i ka synthesis no nā polymers ʻē aʻe e loaʻa.
1. Polyimideka mea nui synthesized mai dibasic anhydrides a me diamines.Hoʻohuiʻia kēia mau monomerʻelua me nā polymers heterocyclic'ē aʻe, e like me polybenzimidazole, polybenzimidazole, polybenzothiazole, polyquinone Ke hoʻohālikelikeʻia me nā monomers e like me ka phenoline a me ka polyquinoline, he ākea ke kumu o nā mea maka, a he maʻalahi hoʻi ka synthesis.Nui nā ʻano dianhydrides a me nā diamine, a hiki ke loaʻa nā polyimides me nā waiwai like ʻole e nā hui like ʻole.
2. Polyimide hiki ke polycondensed ma haʻahaʻa wela e ka dianhydride a me ka diamine i loko o ka polar solvent, e like me DMF, DMAC, NMP a THE / methanol hui 'ohe mea hoʻoheheʻe, e loaʻa ka soluble polyamic acid, ma hope o ke kiʻiʻoniʻoni 'ole wili Hoʻomaʻamaʻa i kahi 300 ° C no ka. dehydration a me ka cyclization i polyimide;acetic anhydride a me ka tertiary amine catalysts hiki ke hoʻohui ʻia i ka polyamic acid no ka dehydration kemika a me ka cyclization e loaʻa ai ka hopena polyimide a me ka pauka.Hiki ke hoʻomehana ʻia ka diamine a me ka dianhydride i loko o kahi mea hoʻoheheʻe kiʻekiʻe e hoʻolapalapa ai, e like me ka phenolic solvent, e loaʻa ai ka polyimide i hoʻokahi ʻanuʻu.Eia kekahi, hiki ke loaʻa ka polyimide mai ka hopena o ka ester a me ka diamine dibasic;hiki ke hoʻololi ʻia mai ka polyamic acid i ka polyisoimide mua, a laila i ka polyimide.Hāʻawi kēia mau ʻano i ka maʻalahi i ka hana ʻana.ʻO ka mea mua i kapa ʻia ʻo PMR ala, hiki ke loaʻa i ka viscosity haʻahaʻa, ka hopena paʻa kiʻekiʻe, a he puka makani me ka viscosity hoʻoheheʻe haʻahaʻa i ka wā o ka hoʻoili ʻana, kūpono loa ia no ka hana ʻana i nā mea composite;piʻi ka hope I mea e hoʻomaikaʻi ai i ka solubility, ʻaʻohe mea haʻahaʻa-molecular i hoʻokuʻu ʻia i ka wā o ka hoʻololi ʻana.
3. E like me ka maʻemaʻe o ka dianhydride (a i ʻole tetraacid) a me ka diamine i kūpono, ʻaʻohe mea i hoʻohana ʻia i ke ʻano polycondensation, maʻalahi ke loaʻa i ke kaumaha molekala kiʻekiʻe, a hiki ke hoʻololi maʻalahi ke kaumaha mole ma ka hoʻohui ʻana i ka anhydride a i ʻole. ʻāpana amine.
4. ʻO ka polycondensation o dianhydride (a i ʻole tetraacid) a me ka diamine, ʻoiai ka lōʻihi o ka lākiō molar a hiki i kahi equimolar ratio, hiki i ka mālama wela i loko o ka vacuum ke hoʻonui nui i ke kaumaha mole o ka prepolymer kaumaha haʻahaʻa haʻahaʻa, e hoʻomaikaʻi ai i ka hana a me ka pauka.E hele mai me ka oluolu.
5. He mea maʻalahi ke hoʻokomo i nā pūʻulu reactive ma ka hope o ke kaulahao a i ʻole ke kaulahao e hana i nā oligomers ikaika, no laila e loaʻa ai ka polyimide thermosetting.
6. E hoʻohana i ka hui carboxyl i polyimide e hana i ka esterification a i ʻole ka paʻakai, a hoʻolauna i nā pūʻulu photosensitive a i ʻole nā hui alkyl kaulahao lōʻihi e loaʻa ai nā polymers amphiphilic, hiki ke hoʻohana ʻia no ka loaʻa ʻana o nā photoresists a hoʻohana ʻia i ka hoʻomākaukau ʻana i nā kiʻiʻoniʻoni LB.
7. ʻO ke kaʻina hana maʻamau o ka synthesizing polyimide ʻaʻole ia e hana i nā paʻakai inorganic, ʻoi aku ka maikaʻi no ka hoʻomākaukau ʻana i nā mea insulating.
8. ʻO ka dianhydride a me ka diamine e like me nā monomers he mea maʻalahi ke hoʻohaʻahaʻa i lalo o ka vacuum kiʻekiʻe, no laila ua maʻalahi ke hana.polyimidekiʻiʻoniʻoni ma luna o nā mea hana, ʻoi aku ka nui o nā mea me nā ʻili like ʻole, ma ka waiho ʻana o ka mahu.
Ka manawa hoʻouna: Feb-06-2023