超高相对分子质量聚丙烯腈溶解的研究

Study of Dissolution of Ultrahigh Molecular Weight Polyacrylonitrile (UHMWPAN)

通过自制力矩测量仪测量溶胀和溶解过程中超高相对分子质量聚丙烯腈—溶剂混合体系力矩随温度变化情况 ,采取阶段升温的方法 ,选择力矩温度曲线中力矩开始上升处所对应温度为恒温温度 ,制得均匀的超高相对分子质量聚丙烯腈(含固量 5 % )浆液。

Based on torque measurement via a device specially developed by our group, the shearing torque of the mixture of UHMWPAN and swellant(solvent in swelling process usually called as swellant) or solvent during shearing process at various temperatures could be recorded as torque temperature diagram in the swelling and the dissolving process The homogeneous solution of UHMWPAN could be obtained easily if the mixture was heated progressively and was kept for a period of time at every constant temperature where the torque of the mixture began to rise as shown in the torque temperature diagram The relationship between the torque peak and the destruction of various texture units of UHMWPAN was also discussed