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Controlling Polyolefin Properties by In‐Reactor Blending: 2. Particle Design
Author(s) -
Ruff Martin,
Paulik Christian
Publication year - 2013
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.201200050
Subject(s) - polyolefin , materials science , polyethylene , scanning electron microscope , polymer , particle size , polymerization , high density polyethylene , particle (ecology) , chemical engineering , dispersion (optics) , low density polyethylene , composite material , morphology (biology) , dispersion polymerization , polymer chemistry , optics , oceanography , physics , layer (electronics) , engineering , geology , biology , genetics
Abstract In‐reactor blends of ultra‐high molecular weight polyethylene (UHMW‐PE) and high‐density medium molecular weight polyethylene (mMW‐PE) were prepared by precise multi‐stage slurry polymerizations. Correlations between polymerization conditions and polymer properties of the reactor powders were investigated by means of scanning electron microscopy (SEM), bulk density and particle size analysis. It is shown that changing the polymerization conditions influences the particle surface morphology as well as the bulk density and this can make the dispersion of UHMW‐PE in mMW‐PE increase, as proposed in a model.