This work synthesized a macromolecular fluorescent-tracer (PS-MAMA) via the copolymerization of styrene (St) and 3-isopropenyl-α

α-dimethylbenzyl isocyanate (TMI) followed by reacting with 9-(methylaminomethyl) anthrance. The dispersion behaviors of PS-MAMA as a minor component in polystyrene (PS) and polymethylmethacrylate (PMMA) were investigated in a homemade batch mixer under two mixing modes. Results showed that for the steady mixing mode in which two rotors rotated together in an opposite direction

the minor component could form a stable laminar flow in a shorter time but the mixing between those layers was very slow; while for the square-wave mixing mode in which two rotors rotated alternately in an opposite direction

the PS-MAMA dispersion in the layer and between layers were poor in the initial mixing stage but the alternate rotation of two rotors can facilitate the exchange between the layers and accelerate the dispersion of minor component PS-MAMA in polymer melt. Therefore

the mixing ability of the square-wave mixing mode was better than that of the steady mixing mode.