SYNTHESIS AND SUPERCRITICAL FLUID EXTRACTION STUDIES ON AMINOPROPYL-TERMINATED POLYSILOXANES.

C. S. Elsbernd, D. K. Mohanty, J. E. McGrath, P. M. Gallagher, V. J. Krukonis

Research output: Contribution to journalConference articlepeer-review

13 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)399-400
Number of pages2
JournalAmerican Chemical Society, Polymer Preprints, Division of Polymer Chemistry
Volume28
Issue number2
StatePublished - Aug 1987
EventPolym Prepr -Pap Presented at the New Orleans, LA Meet - New Orleans, LA, USA
Duration: Aug 30 1987Sep 4 1987

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