Qhov txawv ntawm Aramid Fiber thiab Carbon Fiber
Qhov sib txawv ntawm aramid fiber ntau thiab carbon fiber yog txawv daim ntawv thov teb, txawv txhua yam khoom, txawv thermal stability, thiab sib txawv thermochemical zog;
Daim ntawv thov sib txawv: Carbon fiber yog ib hom tshiab ntawm cov khoom siv fiber ntau nrog cov ntsiab lus carbon ntau dua 95 feem pua. Nws tuaj yeem muab faib ua peb hom: polyacrylonitrile-based, asphalt-based thiab viscose-based. Ntawm lawv, polyacrylonitrile-based carbon fiber muaj qhov ua tau zoo tshaj plaws; carbon fiber yog hu ua Nws yog "xim kub", uas qhia tau hais tias nws tus nqi thiab tus nqi yog siab, thiab nws yog tsuas yog siv nyob rau hauv aerospace thiab tiv thaiv rog. Nrog rau kev txhim kho lub zog ntawm cov cab loj loj carbon fiber ntau, nws tau siv ntau dua hauv kev tsim khoom lag luam thiab pej xeem.
Aramid fiber ntau yog ib hom tshiab ntawm cov hluavtaws fiber ntau, uas yog qhov tseem ceeb sib txawv ntawm carbon fiber. Aramid fiber kuj muaj cov yam ntxwv ntawm lub zog siab thiab siab modulus. Nws kuj yog qhov zoo heev nyob rau hauv qhov kub thiab txias tsis kam, acid thiab alkali tsis kam, thiab lwm yam. Nws yog feem ntau siv rau hauv cov khoom siv mos mos thiab cov khoom siv hauv tsev. , tshwj xeeb cov khaub ncaws tiv thaiv thiab khoom siv hluav taws xob.
Cov khoom siv kho tshuab sib txawv: lub zog tensile ntawm T300 carbon fiber yog 3000MPa, elastic modulus yog 225GPa, elongation ntawm tawg yog 1.7 feem pua, thiab qhov ceev yog 1.7g / cm3. Kev ua tau zoo ntawm T1000 carbon fiber ntau dua li ntawm T300. Qhov ob series ntawm carbon fibers, high-strength thiab high-modulus, muaj ntau yam kev ua tau zoo.
Lub zog tensile ntawm aramid fiber yog 2815MPa, lub modulus ntawm elasticity yog 126GPa, lub elongation ntawm so yog 2.5 feem pua, thiab qhov ceev yog 1.44g / cm3. Nyob rau hauv cov nqe lus ntawm txhua yam khoom, lub sab sauv txwv ntawm carbon fiber ntau dua, tshwj xeeb tshaj yog nyob rau hauv cov nqe lus ntawm lub zog thiab imitation nto.
Txawv thermal stability: Aramid fiber ntau muaj thermal stability zoo. Nyob rau hauv qhov kev txiav txim ntawm qhov kub thiab txias, nws yuav tsis deform ua ntej decomposing, nws yuav siv tau rau lub sij hawm ntev ntawm 180 degree, thiab nws lub zog thiab modulus yuav tsis txo qis tom qab ua yeeb yam ntawm 150 degree, ntxiv rau, nws thermal expansion coefficient yog {{ 2}x{3} ;
Piv nrog rau aramid fiber ntau, qhov thermal stability ntawm carbon fiber kuj zoo dua, thiab nws cov thermal expansion coefficient tseem me dua li ntawm aramid fiber, uas yog -1.4x10-6.
Kev sib txawv thermochemistry: Cov khoom siv tshuaj lom neeg ntawm cov roj carbon fiber zoo ib yam li cov pa roj carbon monoxide, tshwj tsis yog tias nws tuaj yeem oxidized los ntawm cov oxidants muaj zog, nws yog inert rau dav alkali; Thaum qhov kub hauv huab cua siab dua 400 degree, pom tseeb oxidation yuav tshwm sim, tsim C0 thiab CO2; carbon fiber muaj corrosion kuj zoo rau cov organic solvents, acids thiab alkalis, insoluble tshuaj nthuav dav, thiab nws cov corrosion kuj zoo heev, yog li tsis muaj teeb meem xeb txhua.
Aramid fiber muaj qhov nruab nrab tsis zoo thiab muaj zog tiv thaiv cov tshuaj nruab nrab, tab sis nws tau yooj yim tawm tsam los ntawm ntau cov kua qaub thiab alkalis, tshwj xeeb tshaj yog muaj zog acids, thiab nws cov dej kuj tsis zoo.
