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Title: Toward the development of CO{sub 2}-phillic hydrocarbons. 1: Use of side-chain functionalization to lower the miscibility pressure of polydimethylsiloxanes in CO{sub 2}

Abstract

Previous fundamental work on the solvent properties of carbon dioxide by the research groups of McHugh, DeSimone, Johnston, and Eckert has been used as a road map for the design of materials that will be miscible with CO{sub 2} at relatively moderate pressures. In this initial work, judicious side chain functionalization of an oligomeric silicone has been shown to produce a material whose phase behavior in CO{sub 2} resembles that of a fluorinated polyether. The phase behavior results are quite dramatic in that addition of only five ester-functional side chains to the silicone polymer lowers the cloud point curve at 22 C by 2,500 psi. It was also observed that addition of simple alkyl side chains raises the cloud point pressures of the silicone in CO{sub 2}. This latter observation is consistent with results on the phase behavior of poly(n-alkyl acrylates) in CO{sub 2} that showed that increasing alkyl content (i.e., increasing alkyl chain length) also raises cloud point pressures.

Authors:
; ; ;  [1]
  1. Univ. of Pittsburgh, PA (United States). Chemical Engineering Dept.
Publication Date:
OSTI Identifier:
682064
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical
Additional Journal Information:
Journal Volume: 103; Journal Issue: 31; Other Information: PBD: 5 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 36 MATERIALS SCIENCE; CARBON DIOXIDE; SOLVENT PROPERTIES; SILOXANES; POLYMERS; NONAQUEOUS SOLVENTS

Citation Formats

Fink, R., Hancu, D., Valentine, R., and Beckman, E.J. Toward the development of CO{sub 2}-phillic hydrocarbons. 1: Use of side-chain functionalization to lower the miscibility pressure of polydimethylsiloxanes in CO{sub 2}. United States: N. p., 1999. Web. doi:10.1021/jp990333m.
Fink, R., Hancu, D., Valentine, R., & Beckman, E.J. Toward the development of CO{sub 2}-phillic hydrocarbons. 1: Use of side-chain functionalization to lower the miscibility pressure of polydimethylsiloxanes in CO{sub 2}. United States. doi:10.1021/jp990333m.
Fink, R., Hancu, D., Valentine, R., and Beckman, E.J. Thu . "Toward the development of CO{sub 2}-phillic hydrocarbons. 1: Use of side-chain functionalization to lower the miscibility pressure of polydimethylsiloxanes in CO{sub 2}". United States. doi:10.1021/jp990333m.
@article{osti_682064,
title = {Toward the development of CO{sub 2}-phillic hydrocarbons. 1: Use of side-chain functionalization to lower the miscibility pressure of polydimethylsiloxanes in CO{sub 2}},
author = {Fink, R. and Hancu, D. and Valentine, R. and Beckman, E.J.},
abstractNote = {Previous fundamental work on the solvent properties of carbon dioxide by the research groups of McHugh, DeSimone, Johnston, and Eckert has been used as a road map for the design of materials that will be miscible with CO{sub 2} at relatively moderate pressures. In this initial work, judicious side chain functionalization of an oligomeric silicone has been shown to produce a material whose phase behavior in CO{sub 2} resembles that of a fluorinated polyether. The phase behavior results are quite dramatic in that addition of only five ester-functional side chains to the silicone polymer lowers the cloud point curve at 22 C by 2,500 psi. It was also observed that addition of simple alkyl side chains raises the cloud point pressures of the silicone in CO{sub 2}. This latter observation is consistent with results on the phase behavior of poly(n-alkyl acrylates) in CO{sub 2} that showed that increasing alkyl content (i.e., increasing alkyl chain length) also raises cloud point pressures.},
doi = {10.1021/jp990333m},
journal = {Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical},
number = 31,
volume = 103,
place = {United States},
year = {1999},
month = {8}
}