Solubility and Diffusivity of Cyclic Oligomers in Poly(dimethylsiloxane) Using Capillary Column Inverse Gas Chromatography

Ruth E. Baltus; Montgomery M. Alger; Thomas J. Stanley

doi:10.1021/ma00073a018

Solubility and Diffusivity of Cyclic Oligomers in Poly(dimethylsiloxane) Using Capillary Column Inverse Gas Chromatography

Ruth E. Baltus, Montgomery M. Alger, Thomas J. Stanley

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The solubility and diffusivity of octamethylcyclotetrasiloxane (D₄), decamethylcyclopenta-siloxane (D₅), and dodecamethylcyclohexasiloxane (D₆) oligomers in poly(dimethylsiloxane) (PDMS) have been measured using inverse gas chromatography. Experiments were performed at 150, 175, and 200 °C. Solubility values were used to determine the Flory-Huggins interaction parameter for each species. The interaction parameter values were found to range from −0.15 to 0.15 over the temperature range of these measurements. Diffusion coefficient values were of order 10⁻⁶ cm²/s and were found to be in reasonable agreement with the free volume theory of Vrentas and Duda.^1,2 An empirical relationship between diffusivity and solute molecular weight was developed at each temperature. Activation energies for diffusion were found to be 4.4 kcal/mol for D₄ and 7.1 kcal/mo for D₅ and D₆.

Original language	English (US)
Pages (from-to)	5651-5656
Number of pages	6
Journal	Macromolecules
Volume	26
Issue number	21
DOIs	https://doi.org/10.1021/ma00073a018
State	Published - 1993

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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@article{7b005aeab40a4a30bfa506b381942dbc,

title = "Solubility and Diffusivity of Cyclic Oligomers in Poly(dimethylsiloxane) Using Capillary Column Inverse Gas Chromatography",

abstract = "The solubility and diffusivity of octamethylcyclotetrasiloxane (D4), decamethylcyclopenta-siloxane (D5), and dodecamethylcyclohexasiloxane (D6) oligomers in poly(dimethylsiloxane) (PDMS) have been measured using inverse gas chromatography. Experiments were performed at 150, 175, and 200 °C. Solubility values were used to determine the Flory-Huggins interaction parameter for each species. The interaction parameter values were found to range from −0.15 to 0.15 over the temperature range of these measurements. Diffusion coefficient values were of order 10−6 cm2/s and were found to be in reasonable agreement with the free volume theory of Vrentas and Duda.1,2 An empirical relationship between diffusivity and solute molecular weight was developed at each temperature. Activation energies for diffusion were found to be 4.4 kcal/mol for D4 and 7.1 kcal/mo for D5 and D6.",

author = "Baltus, {Ruth E.} and Alger, {Montgomery M.} and Stanley, {Thomas J.}",

year = "1993",

doi = "10.1021/ma00073a018",

language = "English (US)",

volume = "26",

pages = "5651--5656",

journal = "Macromolecules",

issn = "0024-9297",

publisher = "American Chemical Society",

number = "21",

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TY - JOUR

T1 - Solubility and Diffusivity of Cyclic Oligomers in Poly(dimethylsiloxane) Using Capillary Column Inverse Gas Chromatography

AU - Baltus, Ruth E.

AU - Alger, Montgomery M.

AU - Stanley, Thomas J.

PY - 1993

Y1 - 1993

N2 - The solubility and diffusivity of octamethylcyclotetrasiloxane (D4), decamethylcyclopenta-siloxane (D5), and dodecamethylcyclohexasiloxane (D6) oligomers in poly(dimethylsiloxane) (PDMS) have been measured using inverse gas chromatography. Experiments were performed at 150, 175, and 200 °C. Solubility values were used to determine the Flory-Huggins interaction parameter for each species. The interaction parameter values were found to range from −0.15 to 0.15 over the temperature range of these measurements. Diffusion coefficient values were of order 10−6 cm2/s and were found to be in reasonable agreement with the free volume theory of Vrentas and Duda.1,2 An empirical relationship between diffusivity and solute molecular weight was developed at each temperature. Activation energies for diffusion were found to be 4.4 kcal/mol for D4 and 7.1 kcal/mo for D5 and D6.

AB - The solubility and diffusivity of octamethylcyclotetrasiloxane (D4), decamethylcyclopenta-siloxane (D5), and dodecamethylcyclohexasiloxane (D6) oligomers in poly(dimethylsiloxane) (PDMS) have been measured using inverse gas chromatography. Experiments were performed at 150, 175, and 200 °C. Solubility values were used to determine the Flory-Huggins interaction parameter for each species. The interaction parameter values were found to range from −0.15 to 0.15 over the temperature range of these measurements. Diffusion coefficient values were of order 10−6 cm2/s and were found to be in reasonable agreement with the free volume theory of Vrentas and Duda.1,2 An empirical relationship between diffusivity and solute molecular weight was developed at each temperature. Activation energies for diffusion were found to be 4.4 kcal/mol for D4 and 7.1 kcal/mo for D5 and D6.

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U2 - 10.1021/ma00073a018

DO - 10.1021/ma00073a018

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VL - 26

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JO - Macromolecules

JF - Macromolecules

IS - 21

ER -

Solubility and Diffusivity of Cyclic Oligomers in Poly(dimethylsiloxane) Using Capillary Column Inverse Gas Chromatography

Abstract

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