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Supercritical fluid process for the synthesis of maleated poly(vinylidene fluoride)
Author(s) -
Clark Kelly,
Lee Sunggyu
Publication year - 2005
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20318
Subject(s) - benzoyl peroxide , maleic anhydride , radical initiator , monomer , materials science , fourier transform infrared spectroscopy , polymer chemistry , copolymer , supercritical fluid , peroxide , fluoride , surface modification , supercritical carbon dioxide , polymer , chemical engineering , chemistry , organic chemistry , composite material , inorganic chemistry , engineering
Poly(vinylidene fluoride) was grafted with maleic anhydride monomer via a free‐radical mechanism in supercritical carbon dioxide medium. The free‐radical initiator chosen for this study was benzoyl peroxide. The structure of the resultant copolymer pendant groups was determined by 1 H NMR spectroscopy to consist of individual succinyl anhydride functional groups. The degree of functionalization (graft level) was obtained by FTIR spectroscopy through the correlation of absorbance bands using standard samples. The FTIR analysis indicated increased graft level with monomer loading, reaction temperature, and treatment time; however, initiator loading and reaction temperature showed more‐complex behavior. Graft levels increased at moderate benzoyl peroxide initiator loadings (5.0 wt%) and decreased at the highest initiator loadings (10.0 wt%). POLYM. ENG. SCI., 45:631–639, 2005. © 2005 Society of Plastics Engineers