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Measurement of in situ Monomer Sorption in Poly(propylene)
Author(s) -
Pater Jochem T. M.,
Weickert Günter,
Fait Anna,
Mei Gabriele
Publication year - 2004
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400198
Subject(s) - sorption , monomer , materials science , polymer , polymer chemistry , polymerization , in situ , chemical engineering , chemistry , composite material , organic chemistry , adsorption , engineering
Summary: An experimental method has been developed to compare the amount of monomer absorbed in freshly produced poly(propylene) with the amount of monomer absorbed in the same material after degassing. It has been found that propylene sorption in freshly produced poly(propylene) is significantly higher than the sorption in the same but degassed polymer. The difference depends on the degree of drying and is time‐dependent. This fact can be an explanation for reduced activity often observed in the transition from liquid‐ to gas‐phase polymerization.Pressure profile during the pressure‐swing part of the experiment.