Gas permeability analysis of photo-cured cyclohexyl-substituted polysiloxane films

D. P. Dworak; H. Lin; B. D. Freeman; M. D. Soucek

doi:10.1002/app.24480

Gas permeability analysis of photo-cured cyclohexyl-substituted polysiloxane films

D. P. Dworak, H. Lin, B. D. Freeman, M. D. Soucek

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

8 Citations (Scopus)

Abstract

A photo-cured cyclohexyl-substituted polysiloxane (PDCHS) film was prepared and compared with polydimethylsiloxane (PDMS) for the determination of permeability coefficients using various penetrants (H ₂, N ₂,O ₂, CO ₂, CH ₄, C ₃H ₆, and C ₃H ₈). Penetrant sorption isotherms and local effective diffusion coefficients as a function of local penetrant concentration were also determined. The crosslink density of the films was measured via dynamic mechanical thermal analysis and was found to be 6.46 × 10 ⁴ mol/m ³ for PDMS and 1.82 × 10 ³ mol/m ³ for PDCHS. Photo-differential scanning calorimetry was used to calculate percent conver sion under the conditions used for curing and was found to be (99.6 ± 0.3)% for PDMS and (98.4 ± 0.3)% for PDCHS. When cured, the PDCHS films had a lower crosslink density and lower permeance. It was postulated that the cycloaliphatic substitution along the polysiloxane backbone may not have full rotational ability affording closer intermolecular interactions, thus reducing the available free volume.

Original language	English
Pages (from-to)	2343-2351
Number of pages	9
Journal	Journal of Applied Polymer Science
Volume	102
Issue number	3
DOIs	https://doi.org/10.1002/app.24480
Publication status	Published - 5 Nov 2006
Externally published	Yes

Keywords

Cross-link density
DMTA
Films
Gas permeability
P-DSC
Penetrants
Polysiloxanes

Access to Document

10.1002/app.24480

Cite this

@article{91210f2077324aca98863e4ca628dc36,

title = "Gas permeability analysis of photo-cured cyclohexyl-substituted polysiloxane films",

abstract = "A photo-cured cyclohexyl-substituted polysiloxane (PDCHS) film was prepared and compared with polydimethylsiloxane (PDMS) for the determination of permeability coefficients using various penetrants (H 2, N 2,O 2, CO 2, CH 4, C 3H 6, and C 3H 8). Penetrant sorption isotherms and local effective diffusion coefficients as a function of local penetrant concentration were also determined. The crosslink density of the films was measured via dynamic mechanical thermal analysis and was found to be 6.46 × 10 4 mol/m 3 for PDMS and 1.82 × 10 3 mol/m 3 for PDCHS. Photo-differential scanning calorimetry was used to calculate percent conver sion under the conditions used for curing and was found to be (99.6 ± 0.3)% for PDMS and (98.4 ± 0.3)% for PDCHS. When cured, the PDCHS films had a lower crosslink density and lower permeance. It was postulated that the cycloaliphatic substitution along the polysiloxane backbone may not have full rotational ability affording closer intermolecular interactions, thus reducing the available free volume.",

keywords = "Cross-link density, DMTA, Films, Gas permeability, P-DSC, Penetrants, Polysiloxanes",

author = "Dworak, {D. P.} and H. Lin and Freeman, {B. D.} and Soucek, {M. D.}",

year = "2006",

month = nov,

day = "5",

doi = "10.1002/app.24480",

language = "English",

volume = "102",

pages = "2343--2351",

journal = "Journal of Applied Polymer Science",

issn = "0021-8995",

publisher = "John Wiley & Sons",

number = "3",

}

TY - JOUR

T1 - Gas permeability analysis of photo-cured cyclohexyl-substituted polysiloxane films

AU - Dworak, D. P.

AU - Lin, H.

AU - Freeman, B. D.

AU - Soucek, M. D.

PY - 2006/11/5

Y1 - 2006/11/5

N2 - A photo-cured cyclohexyl-substituted polysiloxane (PDCHS) film was prepared and compared with polydimethylsiloxane (PDMS) for the determination of permeability coefficients using various penetrants (H 2, N 2,O 2, CO 2, CH 4, C 3H 6, and C 3H 8). Penetrant sorption isotherms and local effective diffusion coefficients as a function of local penetrant concentration were also determined. The crosslink density of the films was measured via dynamic mechanical thermal analysis and was found to be 6.46 × 10 4 mol/m 3 for PDMS and 1.82 × 10 3 mol/m 3 for PDCHS. Photo-differential scanning calorimetry was used to calculate percent conver sion under the conditions used for curing and was found to be (99.6 ± 0.3)% for PDMS and (98.4 ± 0.3)% for PDCHS. When cured, the PDCHS films had a lower crosslink density and lower permeance. It was postulated that the cycloaliphatic substitution along the polysiloxane backbone may not have full rotational ability affording closer intermolecular interactions, thus reducing the available free volume.

AB - A photo-cured cyclohexyl-substituted polysiloxane (PDCHS) film was prepared and compared with polydimethylsiloxane (PDMS) for the determination of permeability coefficients using various penetrants (H 2, N 2,O 2, CO 2, CH 4, C 3H 6, and C 3H 8). Penetrant sorption isotherms and local effective diffusion coefficients as a function of local penetrant concentration were also determined. The crosslink density of the films was measured via dynamic mechanical thermal analysis and was found to be 6.46 × 10 4 mol/m 3 for PDMS and 1.82 × 10 3 mol/m 3 for PDCHS. Photo-differential scanning calorimetry was used to calculate percent conver sion under the conditions used for curing and was found to be (99.6 ± 0.3)% for PDMS and (98.4 ± 0.3)% for PDCHS. When cured, the PDCHS films had a lower crosslink density and lower permeance. It was postulated that the cycloaliphatic substitution along the polysiloxane backbone may not have full rotational ability affording closer intermolecular interactions, thus reducing the available free volume.

KW - Cross-link density

KW - DMTA

KW - Films

KW - Gas permeability

KW - P-DSC

KW - Penetrants

KW - Polysiloxanes

UR - http://www.scopus.com/inward/record.url?scp=33750346178&partnerID=8YFLogxK

U2 - 10.1002/app.24480

DO - 10.1002/app.24480

M3 - Article

AN - SCOPUS:33750346178

SN - 0021-8995

VL - 102

SP - 2343

EP - 2351

JO - Journal of Applied Polymer Science

JF - Journal of Applied Polymer Science

IS - 3

ER -

Gas permeability analysis of photo-cured cyclohexyl-substituted polysiloxane films

Abstract

Keywords

Access to Document

Other files and links

Cite this