Ahn Hyunchul, Gwak Hyeon Jung, Kim Yong Min, Yu Woong-Ryeol, Lee Won Jun, Yeo Sang Young
Advanced Textile R&D Department, Korea Institute of Industrial Technology, Ansan-si 15588, Korea.
Department of Fiber System Engineering, Dankook University, Yongin 16890, Korea.
Polymers (Basel). 2022 Jun 28;14(13):2625. doi: 10.3390/polym14132625.
Polyacrylonitrile (PAN) fiber is the most widely used carbon fiber precursor, and methyl acrylate (MA) copolymer is widely used for research and commercial purposes. The properties of P (AN-MA) fibers improve increasingly as the molecular weight increases, but high-molecular-weight materials have some limitations with respect to the manufacturing process. In this study, P (AN-MA) precursor fibers of different molecular weights were prepared and analyzed to identify an efficient carbon fiber precursor manufacturing process. The effects of the molecular weight of P (AN-MA) on its crystallinity and void structure were examined, and precursor fiber content and process optimizations with respect to molecular weight were conducted. The mechanical properties of high-molecular-weight P (AN-MA) were good, but the internal structure of the high-molecular-weight material was not the best because of differences in molecular entanglement and mobility. The structural advantages of a relatively low molecular weight were confirmed. The findings of this study can help in the manufacturing of precursor fibers and carbon fibers with improved properties.
聚丙烯腈（PAN）纤维是应用最为广泛的碳纤维前驱体，而丙烯酸甲酯（MA）共聚物则广泛用于研究和商业用途。随着分子量的增加，P（AN-MA）纤维的性能不断改善，但高分子量材料在制造工艺方面存在一些局限性。在本研究中，制备并分析了不同分子量的P（AN-MA）前驱体纤维，以确定一种高效的碳纤维前驱体制造工艺。研究了P（AN-MA）分子量对其结晶度和孔隙结构的影响，并针对分子量进行了前驱体纤维含量和工艺优化。高分子量P（AN-MA）的力学性能良好，但由于分子缠结和迁移率的差异，高分子量材料的内部结构并非最佳。相对较低分子量的结构优势得到了证实。本研究结果有助于制造性能更优的前驱体纤维和碳纤维。
