1470-83-3Relevant articles and documents
Synthesis of copolyamides based on PA 66 bearing lithium sulfonate groups and having unique thermal properties
Cammage, Geoffroy,Spitz, Roger,Boisson, Christophe,Rossin, Rene,Jeol, Stephane,Touraud, Franck
, p. 5057 - 5062 (2011)
Copolyamides of PA 66/6 lithium 5-sulfoisophthalic acid (LiSIPA) containing up to 40 mol % of LiSIPA were prepared in a 1L-pilot reactor operating at high pressures and high temperatures. Interestingly, the presence of lithium sulfonate moieties highly impacted the glass transition temperature of the polyamide. The Tg increased from 59 °C for PA 66 to 155 °C for a copolymer containing about 40 mol % of LiSIPA. 1,3- Dihexylbenzenedicarboxamide and lithium p-toluenesulfonate were synthesized as model compounds to investigate the interaction of lithium sulfonate moieties and amide functions. Infrared spectroscopy using ATR technology performed on mixture of both compounds showed that the carbonyl group of amide functions interacts with the lithium cation of lithium sulfonate moieties. Similar S-O and C-O adsorption bands were observed in copolyamides PA 66/6LiSIPA and in mixture of model compounds, which strongly suggest the formation in the copolyamides of physical cross-linking points centered on lithium cations coordinated by carbonyl groups of amide functions.
Fluorinated diazabicycloalkane derivatives
-
, (2008/06/13)
Fluorinated diazabicycloalkane derivative of the following Formula I: STR1 wherein n represents 0, 1 or 2; R represents a quaternizing organic group; each R1, R2, R3, R4 and R5 independently represents hydrogen, C1 -C6 alkyl, aryl, C1 -C6 alkyl-substituted aryl or aryl-substituted C1 -C6 alkyl and each X- independently represents a conterion or 2X- represents a single divalent counterion, are electrophilic fluorinating agents.
