Abstract
AbstractThe new plastic materials frontier in general and in thermoplastic polyolefins in particular developed in the last years and into next century are and will be represented by polymer alloys. The new trend in polymer alloy is to obtain them from monomer directly in the reactor, replacing the polymer blends previously made by mechanical melt extrusion of preformed polymers. It discloses new opportunities in term of properties together with better economics. The reactor granule technology developed by Himont/Montecatini produces spherical form alloys that are a synergistic combination of morphological, chemical, rheological and thermomechanical properties, by which the polymer finds many applications not previously suitable for polypropylene or polyethylene. In reactor granule technology the multimonomer random and heterophasic copolymers can be produced primarly within the granule enclosed by a solid polymer skin free from sticky nature, typical of polymers obtained by gas‐phase technology and causing many problems like particles agglomeration and fouling.
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