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Polymerization of Vinylidene Difluoride in Supercritical Carbon Dioxide
Author(s) -
Beginn Uwe,
Najjar Reza,
Ellmann Jürgen,
Möller Martin
Publication year - 2011
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201100045
Subject(s) - polymerization , dispersion polymerization , supercritical carbon dioxide , polymer , polymer chemistry , radical polymerization , materials science , precipitation polymerization , gravimetric analysis , fluoride , chemical engineering , supercritical fluid , chemistry , organic chemistry , inorganic chemistry , engineering
The preparation of poly(vinylidene fluoride) in supercritical carbon dioxide is investigated with mixtures of carbon dioxide and vinylidene difluoride alone, as well as in the presence of macromolecular stabilizers my means of turbidimetry, and gravimetric measurements. The morphology of the obtained poly(vinylidene fluoride) powder, and the molecular weight distribution of the polymer was used to distinguish between homogeneous polymerization, precipitation polymerization, and dispersion polymerization due to the added macromolecular stabilizers. The effect of stabilizers and reaction conditions on the predominating locus of polymerization is discussed.