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Difluorocarbene modification of polymer and fiber surfaces
Author(s) -
Olsen Douglas A.,
Osteraas A. Jean
Publication year - 1969
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1969.070130715
Subject(s) - difluorocarbene , polymer , materials science , polymer chemistry , polymer science , chemical engineering , composite material , chemistry , organic chemistry , engineering
Difluorocarbene (difluoromethylene, :CF 2 ) generated by the pyrolysis of sodium chlorodifluoroacetate has been shown to irreversibly modify the surfaces of polymers and fibers. The critical surface tension values of several polymers are shown to decrease with increasing exposure to difluorocarbene vapors and ultimately approach the critical surface tension values of partially fluorinated polyethylenes. The rate‐controlling step appears to be the diffusion of difluorocarbene from the precursor to the polymer substrate. The nature of the interaction between difluorocarbene and the polymer surface is unknown; however, the absence of infrared bands due to CF bonds in attenuated total reflection measurements tends to establish the mono‐molecular‐like character of the modified surface.