TY - JOUR
T1 - SYNTHESIS AND SUPERCRITICAL FLUID EXTRACTION STUDIES ON AMINOPROPYL-TERMINATED POLYSILOXANES.
AU - Elsbernd, C. S.
AU - Mohanty, D. K.
AU - McGrath, J. E.
AU - Gallagher, P. M.
AU - Krukonis, V. J.
PY - 1987/8
Y1 - 1987/8
N2 - The authors discuss the synthesis of aminopropyl-terminated polysiloxane oligomers via ring-opening equilibration reactions and the subsequent supercritical fluid extraction of these oligomers into narrow molecular weight distribution fractions. Fractionation of alpha , omega - carboxypropyl terminated polydimethylsiloxane oligomers using supercritical carbon dioxide was previously reported from our laboratories. This study uses supercritical ethane to fractionate alpha , omega -aminopropyl functional oligomers of varying composition. The molecular weights ranged from 2,000 to 20,000 Mn, while the backbone composition was varied from all dimethyl to various amounts of diphenyl and trifluoropropylmethyl. The parent oligomer and the resulting fractions were characterized by titration as well as by gel permeation, liquid, and gas chromatography.
AB - The authors discuss the synthesis of aminopropyl-terminated polysiloxane oligomers via ring-opening equilibration reactions and the subsequent supercritical fluid extraction of these oligomers into narrow molecular weight distribution fractions. Fractionation of alpha , omega - carboxypropyl terminated polydimethylsiloxane oligomers using supercritical carbon dioxide was previously reported from our laboratories. This study uses supercritical ethane to fractionate alpha , omega -aminopropyl functional oligomers of varying composition. The molecular weights ranged from 2,000 to 20,000 Mn, while the backbone composition was varied from all dimethyl to various amounts of diphenyl and trifluoropropylmethyl. The parent oligomer and the resulting fractions were characterized by titration as well as by gel permeation, liquid, and gas chromatography.
UR - http://www.scopus.com/inward/record.url?scp=0023397797&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:0023397797
SN - 0032-3934
VL - 28
SP - 399
EP - 400
JO - American Chemical Society, Polymer Preprints, Division of Polymer Chemistry
JF - American Chemical Society, Polymer Preprints, Division of Polymer Chemistry
IS - 2
T2 - Polym Prepr -Pap Presented at the New Orleans, LA Meet
Y2 - 30 August 1987 through 4 September 1987
ER -