Relaxation nuclear magnetic resonance imaging (R-NMRI) of PDMS/PDPS siloxane copolymer desiccation

B. R. Cherry; T. M. Alam

doi:10.1016/j.polymer.2004.05.065

Relaxation nuclear magnetic resonance imaging (R-NMRI) of PDMS/PDPS siloxane copolymer desiccation

B. R. Cherry, T. M. Alam

Arizona State University

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

5 Scopus citations

Abstract

Relaxation nuclear magnetic resonance imaging (R-NMRI) was employed to study the effects of desiccation on SiO₂-filled and unfilled polydimethylsiloxane-polydiphenylsiloxane (PDMS/PDPS) copolymers. Uniform NMR spin-spin relaxation time (T₂) profiles were observed across the sample thickness indicating that the drying process is approximately uniform, and that the desiccation of the silicone copolymer is not a H₂O diffusion limited process. In a P₂O₅ desiccation environment, significant reduction of T₂ was observed for the SiO₂-filled and unfilled copolymer material for desiccation up to 225 days. A very small reduction in T₂ was observed for the unfilled copolymer between 225 and 487 days. The increase in relative stiffness with desiccation was found to be higher for the unfilled copolymer.

Original language	English (US)
Pages (from-to)	5611-5618
Number of pages	8
Journal	Polymer
Volume	45
Issue number	16
DOIs	https://doi.org/10.1016/j.polymer.2004.05.065
State	Published - Jul 21 2004

Keywords

Desiccation
Imaging
Siloxanes

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/j.polymer.2004.05.065

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title = "Relaxation nuclear magnetic resonance imaging (R-NMRI) of PDMS/PDPS siloxane copolymer desiccation",

abstract = "Relaxation nuclear magnetic resonance imaging (R-NMRI) was employed to study the effects of desiccation on SiO2-filled and unfilled polydimethylsiloxane-polydiphenylsiloxane (PDMS/PDPS) copolymers. Uniform NMR spin-spin relaxation time (T2) profiles were observed across the sample thickness indicating that the drying process is approximately uniform, and that the desiccation of the silicone copolymer is not a H2O diffusion limited process. In a P2O5 desiccation environment, significant reduction of T2 was observed for the SiO2-filled and unfilled copolymer material for desiccation up to 225 days. A very small reduction in T2 was observed for the unfilled copolymer between 225 and 487 days. The increase in relative stiffness with desiccation was found to be higher for the unfilled copolymer.",

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T1 - Relaxation nuclear magnetic resonance imaging (R-NMRI) of PDMS/PDPS siloxane copolymer desiccation

AU - Cherry, B. R.

AU - Alam, T. M.

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N2 - Relaxation nuclear magnetic resonance imaging (R-NMRI) was employed to study the effects of desiccation on SiO2-filled and unfilled polydimethylsiloxane-polydiphenylsiloxane (PDMS/PDPS) copolymers. Uniform NMR spin-spin relaxation time (T2) profiles were observed across the sample thickness indicating that the drying process is approximately uniform, and that the desiccation of the silicone copolymer is not a H2O diffusion limited process. In a P2O5 desiccation environment, significant reduction of T2 was observed for the SiO2-filled and unfilled copolymer material for desiccation up to 225 days. A very small reduction in T2 was observed for the unfilled copolymer between 225 and 487 days. The increase in relative stiffness with desiccation was found to be higher for the unfilled copolymer.

AB - Relaxation nuclear magnetic resonance imaging (R-NMRI) was employed to study the effects of desiccation on SiO2-filled and unfilled polydimethylsiloxane-polydiphenylsiloxane (PDMS/PDPS) copolymers. Uniform NMR spin-spin relaxation time (T2) profiles were observed across the sample thickness indicating that the drying process is approximately uniform, and that the desiccation of the silicone copolymer is not a H2O diffusion limited process. In a P2O5 desiccation environment, significant reduction of T2 was observed for the SiO2-filled and unfilled copolymer material for desiccation up to 225 days. A very small reduction in T2 was observed for the unfilled copolymer between 225 and 487 days. The increase in relative stiffness with desiccation was found to be higher for the unfilled copolymer.

KW - Desiccation

KW - Imaging

KW - Siloxanes

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Relaxation nuclear magnetic resonance imaging (R-NMRI) of PDMS/PDPS siloxane copolymer desiccation

Abstract

Keywords

ASJC Scopus subject areas

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