对高性能碳纤维原丝性能有重要影响的聚合物粒径均匀度问题目前尚未有人研究过。本研究率先采用沉淀聚合合成高分子量PAN,根据其微观形貌,应用第四统计力学群子统计参数理论研究了聚合物的粒径分布与粒径均匀度的关系,表明粒径均匀度与混合溶剂无关,而与混合溶剂的配比有关,DMSO含量越少,粒径分布越均匀。 No problem has been observed in the uniformity of polymer particles that have an important effect on the properties of high-performance carbon fiber strands. In this study, the first use of precipitation polymerization synthesis of high molecular weight PAN, according to its micro-morphology, the fourth statistical statistical analysis of the statistical parameters of the polymer particle size distribution and particle size uniformity of the relationship shows that particle size uniformity and mixing Solvent has nothing to do with the mixed solvent ratio, the smaller the DMSO content, the more uniform particle size distribution.