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聚丙烯腈的合成方法和工艺直接影响PA N基碳纤维产品的性能,本文利用动静态激光散射法研究了溶液聚合反应中,不同引发剂用量制备的聚丙烯腈的重均分子量、流体力学直径以及粒子尺寸分布。得到随着引发剂用量增多,聚合反应得到的聚丙烯腈的重均分子量和粒子尺寸减小,而粒子尺寸分布变宽。分子量测试结果与凝胶渗透色谱法得到的数据趋势相吻合,该研究方法为高性能聚丙烯腈基碳纤维的制备工艺和实验条件制定提供了有效的依据。
Polyacrylonitrile synthesis methods and processes have a direct impact on the performance of PA N-based carbon fiber products. In this paper, the dynamic and static laser light scattering method was used to study the weight average molecular weight and hydrodynamic diameter of polyacrylonitrile prepared by different initiator dosage in solution polymerization Particle size distribution. It was found that as the amount of the initiator increased, the weight average molecular weight and the particle size of the polyacrylonitrile obtained by the polymerization decreased, and the particle size distribution became wider. The molecular weight test results are consistent with the data trend obtained by gel permeation chromatography. This research method provides an effective basis for the preparation of high performance polyacrylonitrile-based carbon fiber and experimental conditions.