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对用稀溶液粘度法确定不同高分子之间混溶性的Δ b判据、α判据和Δ [η]判据进行了深入的研究 ,发现三者虽然形式上有所不同 ,但是都从不同的侧面反映了不同高分子之间相互作用参数 k AB的值对不同高分子之间混溶性的影响。Δ [η]判据实际上反映的是 k AB绝对值的大小对不同高分子之间混溶性的影响 ;而Δ b判据和α判据反映的是 k AB相对值大小对不同高分子之间混溶性的影响。文章用Δ b判据和Δ [η]判据对聚甲基丙烯酸甲酯 (PMMA )和聚醋酸乙烯酯 (PVAc)在不同溶剂中的粘性行为进行了研究 ,发现溶剂的选择对溶液中不同高分子之间的混溶性有着非常大的影响
The Δ b criteria, the α criterion and the Δ [η] criterion for determining the miscibility of different macromolecules with dilute solution viscosity method were studied in depth. It was found that although the three were different in form, they all differed from each other The side reflects the different polymer interaction parameters k AB value of the different polymer compatibility between the impact. The criterion of Δ [η] actually reflects the influence of the absolute value of k AB on the miscibility between different polymers. The Δ b criterion and the α criterion reflect the relative value of k AB to different polymers Effect of miscibility. In this paper, the viscosity behavior of PMMA and PVAc in different solvents was studied by Δ b criterion and Δ [η] criterion. It was found that the choice of solvent was not suitable for the solution Compatibility between polymers has a very big impact