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Adsorption of polypropylene from dilute solutions on a zeolite column packing
Author(s) -
Macko Tibor,
Pasch Harald,
Denayer Joeri F.
Publication year - 2005
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200401775
Subject(s) - polypropylene , tacticity , adsorption , zeolite , materials science , chemical engineering , polymer chemistry , sorbent , faujasite , polypropylene glycol , solvent , chromatography , chemistry , polymer , organic chemistry , composite material , polymerization , polyethylene glycol , catalysis , engineering
Faujasite type zeolite CBV‐780 was tested as adsorbent for isotactic polypropylene by liquid chromatography. When cyclohexane, cyclohexanol, n ‐decanol, n ‐dodecanol, diphenylmethane, or methylcyclohexane was used as mobile phase, polypropylene was fully or partially retained within the column packing. This is the first series of sorbent–solvent systems to show a pronounced retention of isotactic polypropylene. According to the hydrodynamic volumes of polypropylene in solution, macromolecules of polypropylene should be fully excluded from the pore volume of the sorbent. Sizes of polypropylene macromolecules in linear conformations, however, correlate with the pore size of the column packing used. It is presumed that the polypropylene chains partially penetrate into the pores and are retained due to the high adsorption potential in the narrow pores.