以高组成比组分构成分散相的共混物形态结构控制

The sea-island composite fiber was produced by melt spinning from non-compatibility blend polymer systems or partial compatibility blend polymer systems. And further, the super fine fiber can be obtained from that composite fiber after the sea composition in them is dissolved away. Generally, high content composition in blend polymer formed a continuous phase. But there will be an important significance on theory and practice, if high content composition can form dispersed phase. The results.obtained from testing by selecting different blend polymer systems are: (1) the composition which is more than 65% can form dispersed phase; (2) raising the melt- viscosity ratio A between dispersed phase and continuous phase can get the blend polymer that takes high content composition as dispersed phase; (3) the A of non-compatibility blend polymer is lower, and the A of partial compatibility blend polymer is higher; (4) A can be reached by selecting the molecular weight of materials and the spinning parameters (T, ?); (5) taking the high content composition as dispersed phase will cause island抯 size to be wider, so spinning will come across difficulty. Adding.compatibility agent properly can solve this problem; (6) the super fine fiber only 500 nm in diameter can be produced after stripping the sea-island composite fiber. And 4500 t of PA6/PE sea-island composite fiber has be produced by blend spinning.

使高组成比组分在非相容共混体系中构成分散相有违常规，也少有研究，却极具理论及衫价值。本研究欲以高组成比组分（PA）与易水解聚酯共混，通过共混条件的控制使呈基体－微纤型结构，PA构成分散相。连续相被水解后，分散相形成线密度为0.005dt左右的束状超极细纤维。它是高档人千造麂皮、高密滤材、电池隔膜等的上佳材料。.