Morphology and supermolecular structure of polypropylene poly(1-butene) hydrogenated oligo(cyclopentadiene) ternary blends

Ternary blends containing polypropylene, poly(l-butene), and hydrogenated oligo(cyclopentadiene) have been studied using microscopic, calorimetric, and X-ray diffraction techniques. While no phase separation was found to occur in the melt for all the considered compositions, demixing phenomena were observed by scanning electron microscopy in the ternary blends after crystallization of both polyolefins. On the other hand, a homogeneous surface without the presence of separate domains was observed for blends quenched avoiding the crystallization of polypropylene. The composition has been found to affect the crystallization and the melting properties of the ternary blends and the crystal modification of polypropylene. (C) 1998 John Wiley & Sons, Inc.