RHEOLOGICAL PROPERTIES AND MORPHOLOGY OF POLYBLENDS OF POLYPROPYLENE AND A COPOLYMER OF STYRENE AND 2,2,6,6-TETRAMETHYL-4-PIPERRIDINYLMETHACRYLATE (PDS)
苯乙烯和4-(甲基丙烯酸)2,2,6,6-四甲基哌啶醇酯共聚物与聚丙烯共混物流变性能和形态

Bheological properties and morphology of the title polyblends were studied by using Instron capillary rheometer, examination of photomicrographs and labelling.It was found that the PDS is dispersed in the polypropylene as t separate phase of typically spherical globules, and that the particle size varies with shear rate of extrusion, length/diameter ratio of the capillary and molecular weight of the PDS.