Effects of the viscosity ratio on polyolefin ternary blends

摘要

Polyolefin binary and ternary blends were prepared from polypropylene (PP), an ethylene-a-olefin copolymer (mPE), and high-density polyethylene (HDPE) on the basis of the viscosity ratio of the dispersed phase to the continuous phase. In PP/mPE/HDPE blends, fibrils were observed when the dispersed-phase (mPE/HDPE) viscosity was less than that of PP, or when the viscosity of mPE was less than that of PP, although the viscosity of mPE/HDPE was greater than that of PP. The notched impact strength and mechanical properties such as the yield strength, flexural modulus, and hardness of PP/mPE binary blends further increased with the addition of HDPE according to the type of HDPE. (C) 2004 Wiley Periodicals, Inc. [References: 19]