Carboxyl-terminated butadiene nitrile (CTBN) polymer yog ib qho elastomer uas muaj kev tiv taus zoo heev rau txhua yam khoom, thermal thiab tshuaj lom neeg. Cov yam ntxwv tshwj xeeb no ua rau CTBN yog cov khoom siv dav hauv ntau yam lag luam. Hauv tsab xov xwm no, peb yuav tshawb nrhiav seb carboxyl-terminated butadiene nitrile yog dab tsi thiab nws cov ntawv thov hauv ntau qhov chaw sib txawv.
Carboxyl-terminated butadiene nitrileyog ib qho copolymer ntawm butadiene thiab acrylonitrile uas dhau los ntawm cov txheej txheem carboxylation thaum lub sijhawm tsim khoom. Cov txheej txheem no qhia txog cov pab pawg carboxyl functional rau hauv cov saw polymer, txhim kho nws cov khoom elastic. Cov copolymer tshwm sim muaj qhov hnyav molecular siab, qis polydispersity index, thiab solubility zoo hauv ntau yam organic solvents.
Cov polymers Carboxyl-terminated butadiene nitrile paub txog lawv qhov kev tiv taus zoo heev rau cua sov, roj, roj, kua hydraulic thiab ntau lwm yam tshuaj lom neeg. Nws lub peev xwm tiv taus qhov kub thiab txias heev ntawm -40 ° C txog 150 ° C, ua ke nrog nws qhov kev tiv taus ozone thiab huab cua zoo heev, ua rau nws yog cov khoom siv zoo tshaj plaws rau kev siv uas xav tau ntau.
Ib qho ntawm cov kev siv tseem ceeb ntawm carboxyl-terminated butadiene nitrile yog nyob rau hauv kev lag luam aerospace. Nws feem ntau yog siv ua tus neeg sawv cev rau cov epoxy resins siv rau hauv kev tsim cov qauv sib xyaw ua ke ntawm dav hlau. Kev ntxiv ntawm CTBN txhim kho qhov kev tiv taus kev cuam tshuam, kev tawg thiab kev ruaj khov ntawm cov khoom sib xyaw no. Nws qhov kev ruaj khov thermal tso cai rau nws kom tswj tau nws cov khoom siv kho tshuab txawm tias nyob rau qhov siab thiab thaum muaj kev hloov pauv kub sai.
Lwm daim ntawv thov tseem ceeb ntawm carboxyl-terminated butadiene nitrile yog nyob rau hauv kev lag luam tsheb. CTBN feem ntau yog siv ua cov khoom tseem ceeb hauv cov txheej txheem, cov nplaum thiab cov sealants rau cov khoom siv tsheb. Nws cov roj zoo heev, roj thiab tshuaj lom neeg tsis kam, ua ke nrog nws qhov yooj ywm thiab ruaj khov, ua rau nws yog cov khoom siv zoo tagnrho rau gaskets, O-rings, seals thiab diaphragms. Nws pab ua kom ntseeg tau tias kev ua haujlwm zoo thiab lub neej ntev ntawm cov khoom hauv cav, kis tau tus mob thiab cov tshuab hydraulic.
Kev lag luam hluav taws xob kuj tau txais txiaj ntsig los ntawm cov yam ntxwv tshwj xeeb ntawm carboxyl-terminated butadiene nitriles. Cov elastomer no siv dav hauv kev tsim cov khoom siv rwb thaiv tsev thiab cov ntaub ntawv sheathing. CTBN polymers muaj kev tiv thaiv zoo rau cov dej noo, roj thiab tshuaj lom neeg, nrog rau lub zog dielectric siab thiab thermal stability. Cov yam ntxwv no ua rau nws yog cov khoom siv zoo tshaj plaws rau kev ua kom muaj kev nyab xeeb thiab kev ntseeg siab ntawm cov kab ke hluav taws xob.
Ntxiv rau cov lag luam uas tau hais los saum toj no, carboxyl-terminated butadiene nitrilekuj siv rau hauv kev tsim cov xim, cov nplaum thiab cov sealants, qhov twg nws qhov sib xws nrog ntau yam organic solvents yog qhov zoo tshaj plaws. Nws kuj siv rau hauv kev tsim cov roj hmab ua tau zoo, muab kev tiv thaiv kev cuam tshuam thiab elasticity ntau dua.
Hauv kev xaus lus, carboxybutadiene nitrile yog ib qho elastomer ntau yam uas muaj kev tiv thaiv zoo heev rau kev kho tshuab, thermal thiab tshuaj lom neeg. Nws cov ntawv thov dav dav hauv aerospace, automotive, hluav taws xob thiab lwm yam lag luam tau ua pov thawj nws qhov kev ntseeg tau thiab kev ua haujlwm zoo. Raws li thev naus laus zis nce qib thiab kev lag luam xav tau cov ntaub ntawv ua tau zoo dua, CTBN txuas ntxiv hloov pauv thiab pab txhawb rau ntau yam lag luam, ua rau nws yog cov khoom siv muaj txiaj ntsig rau ntau daim ntawv thov.
Lub sijhawm tshaj tawm: Lub Kaum Hli-20-2023