Self-diffusion in Solutions of Carboxylated Acrylic Polymers as Studied by Pulsed Field Gradient NMR. 1. Solvent Diffusion Studies

Cosgrove, Terence; Rodin, Victor V.; Murray, Martin; Buscall, Richard

doi:10.1007/s10965-006-9087-1

Cited by 6 publications

(2 citation statements)

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“…Several different experimental techniques have been previously used to measure diffusion coefficients. These include FTIR-ATR [7], NMR [8,9], neutron and X-ray reflectivity measurements [10], electrical impedance spectroscopy (EIS) [11], secondary ion mass spectrometry (SIMS) [12], fluorescence spectroscopy [13], light microscopy [14] and mass uptake measurements [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Diffusivity of alkanes in polystyrene

Bernardo

2012

J Polym Res

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Gravimetry is used to study the diffusivity of a homologous series of linear alkanes (C n , with n08, 10, 12, 14 and 16) in amorphous polystyrene at temperatures ranging from 45°C to 145°C, i.e. both below and above the polymer glass transition temperature (100°C). All the mass uptake results obtained are well described by a simple Fickian model (for t0.993, for all temperatures) with respect to the number of carbon atoms (n) in the alkyl chain, log(D) decreasing when n increases. For each liquid penetrant, over the temperature intervals considered, its log (D) also increases linearly (R 2 >0.996 for all the systems) with the decrease in the penetrant's liquid viscosity.

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Section: Introductionmentioning

confidence: 99%

Diffusivity of alkanes in polystyrene

Bernardo

2012

J Polym Res

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“…These interfacial phenomena impact performance in polymer formulation and have a technology importance in industry materials based on random copolymers. A major factor is the copolymer composition (e.g., hydrophobic moiety and weak polyacid) [14] [15] which influences the removal of solvent at film formation. Another essential question is how the dried film interacts with water [6] [9]- [12].…”

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confidence: 99%

Nuclear Magnetic Resonance Study of Water-Polymer Interactions and Self-Diffusion of Water in Polymer Films

Rodin¹,

Cosgrove²

2016

OALib

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The diffusivity and distribution of water in the butyl methacrylate and methacrylic acid copolymer films swollen in water have been investigated using the NMR relaxation and pulse field gradient (PFG) NMR techniques. The contributions of polymer matrix protons, surface water and bound water have been determined from 1 H NMR spectra and relaxation functions. PFG NMR experiments showed that the echo attenuation function depends on the diffusion time indicating that water inside the swollen film is trapped in restricted confinement. The data obtained have been discussed using published physical models for diffusion of water in polymeric materials. The sizes of pores inside the film were estimated using the published model approaches giving the range of 0.8 -1.0 µm. Magnetization decays as well as the spinspin relaxation times of water saturated polymer films were also determined in this study. NMR relaxation provided additional information on the water distribution in the porous microstructure. The volume-averaged water mobility decreased with increasing hydrophobic content of the polymers. Subject Areas

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Macromolecular Hydration: NMR Studies

Rodin¹

2018

Encyclopedia of Biophysics

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Self-diffusion in Solutions of Carboxylated Acrylic Polymers as Studied by Pulsed Field Gradient NMR. 1. Solvent Diffusion Studies

Cited by 6 publications

References 43 publications

Diffusivity of alkanes in polystyrene

Diffusivity of alkanes in polystyrene

Nuclear Magnetic Resonance Study of Water-Polymer Interactions and Self-Diffusion of Water in Polymer Films

Macromolecular Hydration: NMR Studies

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