High-molecular- hnyav PAN cov kev daws teeb meem coj tus cwj pwm zoo li shear-thinning tsis yog-Newtonian kua; Lawv viscosity txo qis thaum concentration nce, thiab spinning dope system nthuav tawm feem ntau elastic yam ntxwv. Qhov siab thiab qhov kub thiab txias ntawm coagulation da dej, nrog rau qhov pom tseeb qhov tsis zoo ntawm qhov sib piv tau siv rau hauv nws, ua rau muaj kev cuam tshuam tseem ceeb ntawm tus ntoo khaub lig ncig -sectional shape thiab deg morphology ntawm nascent fibers. Raws li kev ua tau zoo ntawm kev ua haujlwm-tshwj xeeb, coagulation da dej concentration ntawm 80% thiab qhov kub ntawm 40℃-nascent fibers muaj qhov zoo tshaj plaws morphology thiab lub cev zoo tshaj -cov khoom siv tshuab tuaj yeem tau txais. Tom qab ntawv tshaj tawm- cov txheej txheem kho xws li cov dej npau npau thiab cov duab kos duab, siab -PAN precursor fibers nrog lub zog tensile ncav cuag 0.96 GPa tuaj yeem ua tiav.
Lub cev muaj zog ntawm pitch-raws li carbon fiber precursor fibers txawv nyob ntawm seb cov khoom siv precursor siv. Isotropic pitch-raws li carbon fibers feem ntau yog siv rau hauv daim ntawv ntawm tws fibers, featuring diameters li ntawm 12 mus rau 18 μm, ib tug ceev ntawm kwv yees li 1.6 g / cm³, thiab ib tug kuj tsawg modulus ntawm ib ncig ntawm 40 GPa. Nyob rau hauv sib piv, mesophase pitch-raws li carbon fibers feem ntau yog tsim raws li nruam filaments, nrog diameters li ntawm 7 mus rau 10 μm; Cov fibers no muaj qhov ceev ntawm 1.7 thiab 2.2 g / cm³ thiab tuaj yeem ua tiav cov qauv ntawm 600 txog 965 GPa.
Raws li lub hauv paus tseem ceeb rau cov pa roj carbon fiber ntau, polyacrylonitrile (PAN) muaj cov qauv saw molecular thiab thermal stability uas ua rau nws cov precursor fibers hloov pauv tau zoo-thaum cov txheej txheem thermal tom ntej- mus rau carbon fibers uas muaj zog thiab siab modulus.
