NOVEL TECHNIQUE FOR PREPARING POLYMERIC GRADIENT MATERIALS AND RELATED STRUCTURE PROPERTIES

This paper proposes a novel extruding technique for preparing polymeric gradient material. A columnar PP/ABS gradient material was prepared by use of this method. The composition, morphological structure and mechanical properties of the PP/ABS gradient material along the radial direction were investigated by using DSC, TEM and tensile tests. The results indicate that the content of PP gradually decreases while ABS gradually increases with increasing radius. The TEM photographs show that the morphology also evolves with the varying in the content ratio of two polymers. A phase inversion phenomenon was recognized in this gradient material. Experimental facts show that the polymeric gradient material can be prepared successfully by using this specific extruding technique.