Abstract The rheological properties of PAN/DMSO solution and the size and distribution of PAN coils were studied by rheology and dynamic light scattering (DLS) measurements. It was found that water could be used as a gel accelerator and increase the gel transition temperature T gel and the storage modulus G′ as well as decrease the damping factor tan δ through rheological measurements. DLS test shows that the average size of PAN coils increases significantly with the increase in gel accelerator content. In addition, the gel accelerator can change the mobility of PAN chains during the cooling process. The results show that the gel accelerator can enhance the entanglement of PAN macromolecular chains and improve the formation of three-dimensional network gel structure, so that PAN solution is more prone to gel transition during the cooling process.

中文翻译：

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凝胶促进剂对PAN溶液凝胶转变机理的流变学和动态光散射研究

摘要 通过流变学和动态光散射 (DLS) 测量研究了 PAN/DMSO 溶液的流变特性以及 PAN 线圈的尺寸和分布。通过流变学测量发现，水可以用作凝胶促进剂并提高凝胶转变温度 T gel 和储能模量 G' 以及降低阻尼因子 tan δ。DLS 测试表明，随着凝胶促进剂含量的增加，PAN 卷材的平均尺寸显着增加。此外，凝胶促进剂可以在冷却过程中改变 PAN 链的流动性。结果表明，凝胶促进剂可以增强PAN大分子链的缠结，促进三维网络凝胶结构的形成，使PAN溶液在冷却过程中更容易发生凝胶转变。