Abstract
Asphalt samples modified by melting isotropic asphalt with polyacrylonitrile (PAN) are obtainable. Investigations were conducted on the spinnability, microstructure, and thermal stability of the modified asphalt. The results demonstrate that pan40w modified asphalt possesses the highest spinnability stability. Additionally, there is a reduction in viscosity within the smooth range, a slight increase in the flow point, and an enhancement in spinnability. Compared to other modified asphalt samples, PT403 containing 0.3 % PAN exhibited the highest comprehensive performance, characterized by a molecular weight of 400,000, enhanced spinnability, a larger and more uniform microcrystal size, and improved thermal stability. This study employs a distinctive modification scheme and provides a cogent explanation of the corresponding mechanisms, potentially contributing to the advancement of producing cost-effective pitch-based carbon fibers from petroleum by-products.
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