Abstract
The effects of simple shear flow on the phase behavior of nylon 4,6/poly(phenylene sulfide) (PA4,6/PPS) blends, which are completely immiscible in the measured temperature range in the quiescent state, have been investigated by a shear apparatus. In the shear experiments, the miscibility region appeared for the PA4,6/PPS 80/20 composition at a high shear rate, above 150 sec−1 at 310°C and 189 sec−1 at 320°C. On the other hand, the shear-induced mixing did not take place for the other measured compositions (PA4,6/PPS 50/50 and 20/80). Therefore, the shear-induced mixing took place in only a small region although there existed no single-phase region in the quiescent state. The single-phase specimen under the shear flow is again phase separated during annealing without shear flow. The phase separation took place via spinodal decomposition and a regular, phase-separated morphology was observed.
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