3,3′,4,4′-Biphenyltetracarboxylic dianhydride CAS 2420-87-3
3,3 ', 4,4' - ʻO ka biphenyltetracarboxylic dianhydride kahi mea monomer polyimide koʻikoʻi me nā noi ākea i ka synthesis o nā mea polyimide kūpaʻa wela kiʻekiʻe. Hoʻohana ʻia no ka hana ʻana o nā huahana polyimide a me kā lākou mau mea hui, nā mea lapaʻau waena.
ʻO CAS 2420-87-3 o 3,3',4,4'-Biphenyltetracarboxylic dianhydride kahi ʻano kūikawā a me ka hana maikaʻi loa o ka hui dianhydride ʻala, a he monomer koʻikoʻi nō hoʻi ia no ka synthesis o nā mea polymer hana kiʻekiʻe. Loaʻa iā ia kahi kūlana noi hiki ʻole ke hoʻololi ʻia ma nā kahua e like me ka aerospace, ka ʻike uila, a me nā lako kiʻekiʻe.
| Mea | Nā kikoʻī |
| Kikowaena paila | 614.9±48.0 °C (Wānana ʻia) |
| Ka nui o ka paʻa | 1.625±0.06 g/cm3 (Wānana ʻia) |
| Kiko heheʻe | 299-305 °C (mālamalama ʻia) |
| λmax | 300nm (mālamalama ʻia) |
| Maʻemaʻe | 99% |
| Nā kūlana mālama | Lewa inert, Mahana o ka lumi |
ʻO 3,3',4,4'-Biphenyltetracarboxylic dianhydride (CAS 2420-87-3, i hoʻopōkole ʻia ʻo BPDA) kahi monomer koʻikoʻi no ka hana ʻana i nā mea polymer hana kiʻekiʻe, a ua kālele nui ʻia kāna mau noi ma ke kahua o nā mea hana kiʻekiʻe.
1. Hoʻohana ʻia ka 3,3',4,4'-Biphenyltetracarboxylic dianhydride ma ke ʻano he mau ʻāpana kūkulu kūpaʻa wela kiʻekiʻe no ka mokulele (e like me nā ʻāpana kūloko o nā pahu ukali) a me nā uhi insulation no nā keʻena mīkini; ʻO ka substrate antenna palupalu o nā lako a me ka papa insulation uwea kūpaʻa wela kiʻekiʻe.
2. Hiki ke hoʻohana ʻia ka BPDA i nā kaapuni hoʻohui (ics): e hoʻomākaukau i nā kiʻiʻoniʻoni insulating interlayer, e hōʻemi i ka deformation dimensional i hoʻokumu ʻia e ka hoʻomehana ʻana o ka chip, a hoʻonui i ke kūpaʻa o ka chip. Hana ʻia ia i nā mea composite PI (e like me ke fiber carbon i hoʻopiha ʻia a me ka graphite), i hoʻohana ʻia i nā bearings a me nā sila ma lalo o nā kūlana hana wela kiʻekiʻe (e like me ke sila ʻana i nā ʻāpana o nā mīkini kaʻa a me nā lako kemika), e hoʻololi ana i nā mea metala e hōʻemi i ka ʻaʻahu a me ka corrosion.
3. Ma waho aʻe o ka polyimide, hiki i ka BPDA ke hana pū me nā monomers like ʻole e hana i nā mea polymer hana ʻē aʻe, e hoʻonui ana i kona mau palena noi
ʻO ka polyamideimide synthetic (PAI): Hoʻopili ka BPDA me ka diisocyanate e hana i ka PAI. Hoʻohui kēia ʻano mea i ke kūpaʻa wela kiʻekiʻe o PI a me ke kūpaʻa hopena o ka polyamide, a hiki ke hoʻohana ʻia e hoʻomākaukau i nā ʻāpana plastik ʻenekinia kiʻekiʻe.
ʻO ka polyetherimide synthetic (PEI): Hoʻopili ia me nā diamines e loaʻa ana nā pilina ether e hana iā PEI. ʻOi aku kona hiki ke hana ma mua o ka PI kuʻuna. Hiki ke hana ʻia i loko o nā pūpū o nā mea uila a me nā mea hoʻohui kū i ke kiʻekiʻe wela ma o ka hoʻoheheʻe ʻana i ka injection, e noʻonoʻo ana i ka ikaika a me ka maʻalahi o ke kaʻina hana.
4. Hiki i nā hui anhydride i loko o ka mole BPDA ke hana i nā hopena wehe apo me nā hui epoxy o ka resin epoxy a hoʻohana ʻia e like me nā mea hoʻōla kū i ke kiʻekiʻe wela:
Hoʻohana nui ʻia ka 4,4'-Biphthalic Anhydride 2420-87-3 no ka hoʻomākaukau ʻana i nā "mea hui epoxy pale wela kiʻekiʻe", e like me ka hoʻōla ʻana o ke aʻa o nā pahi turbine makani (pono e kū i ka ʻelemakule wela kiʻekiʻe o waho) a me ka hoʻōla ʻana o nā substrates epoxy no nā papa kaapuni kiʻekiʻe, e hoʻonui i ke kūpaʻa wela (hiki ke hoʻonui ʻia ka Tg o ka mea i hoʻōla ʻia ma luna o 180 ℃) a me ka ikaika mechanical o nā mea epoxy.
Hoʻopili pinepine ʻia i loko o 25kg / pahu, a hiki ke hana ʻia kahi pūʻolo i hoʻopilikino ʻia.
3,3',4,4'-Biphenyltetracarboxylic dianhydride CAS 2420-87-3
3,3',4,4'-Biphenyltetracarboxylic dianhydride CAS 2420-87-3
