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Silylation of OH‐polymers by reactive extrusion
Author(s) -
Mormann Werner,
Spitzer David
Publication year - 2001
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200112)176:1<279::aid-masy279>3.0.co;2-z
Subject(s) - silylation , reactive extrusion , polymer , extrusion , polymer chemistry , materials science , trimethylsilyl , chemical engineering , vinyl alcohol , methyl cellulose , organic chemistry , decomposition , chemistry , cellulose , catalysis , composite material , engineering
Silylation of poly(vinyl alcohol) and cellulose with hexamethyldisilazane (HMDS) in a twin screw extruder using ammonia as reaction medium has been studied. As the starting materials are powders which do not melt without decomposition both polymers were blended with the corresponding trimethylsilyl polymer and a reaction compartment was created using appropriate restrictor elements. Reaction profiles with temperatures below 100°C in the reaction zone and lower temperature in the restrictor zones enabled silylation of both polymers. Residence times were as low as 15 min.