Polymer/probe interaction in probe diffusion through a polymer matrix: methyl red diffusion in poly(vinyl acetate)/toluene solutions

Lee, Jae-Young; Park, Kaapjoo; Chang, Taihyun; Jung, Jin Chul

doi:10.1021/ma00051a039

Cited by 31 publications

(65 citation statements)

References 4 publications

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“…For instance, recent research suggested that the diffusion of methyl red was retarded substantially more in a toluene solution of poly(vinyl acetate) than in polystyrene [38]. The slower diffusion of methyl red in the presence of poly(vinyl acetate) was ascribed to the hydrogen bonding between the drug and the polymer.…”

Section: Drug Release Behaviormentioning

confidence: 99%

On the suitability of nanocrystalline ferrites as a magnetic carrier for drug delivery: Functionalization, conjugation and drug release kinetics

et al. 2007

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Section: Drug Release Behaviormentioning

confidence: 99%

On the suitability of nanocrystalline ferrites as a magnetic carrier for drug delivery: Functionalization, conjugation and drug release kinetics

et al. 2007

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“…Additionally, specific interactions between the polymer and the molecule may also affect D . Hydrogen bonding has been found to slow down the translational diffusion of probes mainly in polymer/solvent systems [11, 12] but also in polymer films [13]. If this limitation of diffusion due to hydrogen bonding or other specific interactions is considerably high, neglecting such parameters by only taking into account a substance's molecular weight could lead to an exaggerative overestimation of D .…”

Section: Introductionmentioning

confidence: 99%

Diffusion studies through fluorescence recovery after photobleaching in hydrated polyamides

Hatzigrigoriou

Papaspyrides

Joly

et al. 2010

Polymer Engineering & Sci

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The effect of hydrogen bonding on the diffusivities of two almost identical fluorescent probes through polyamides was examined using fluorescence recovery after photobleaching (FRAP). The two molecules have the same geometry and a negligible difference in their molecular weight, the main difference confined is one characteristic group able to form a hydrogen bond with the polyamide matrices. Moreover, the effect of hydration on the diffusion coefficients and the plasticization activation energy is also studied as the experiments are repeated in various relative humidity environments. The differences in the diffusivities of the two molecules due to hydrogen bonding were as much as one order of magnitude regardless the matrix or the water content. In addition, it is shown that the plasticization activation energy of diffusion is also affected by matrix—diffusant interactions as the relevant values of the two examined diffusing molecules showed noticeable differences due to hydrogen bonding. POLYM. ENG. SCI., 2011. © 2010 Society of Plastics Engineers

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“…Lee et al 24 measured ortho-MR and para-MR diffusion coefficients in 25°C PVAc/toluene solutions using the ⌬t method and found the diffusion coefficient could be described by the function DϭD 0 exp͑Ϫa ͒, where D 0 is the MR diffusion coefficient in pure toluene, is the polymer volume fraction, and a and are determined from the fit. For ortho-MR in PVAc/toluene at 25°C, these authors found D 0 ϭ͑12.6Ϯ0.9͒ϫ10 Ϫ6 cm 2 /s, aϭ4.4Ϯ1.2, and ϭ0.62 Ϯ0.06.…”

Section: Resultsmentioning

confidence: 99%

“…Lee et al24 examined several derivatives of MR in PVAc and polystyrene toluene solutions with polymer volume fractions in the range 0рр0.11. The MR/PVAc/toluene diffusion coefficients measured byLee et al in this range agreed with those of Lodge and co-workers, and confirmed that hydrogen bonding can play an important role in MR diffusion through polymer matrices 16.…”

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confidence: 99%

Curvature-based analysis of nonmonotonic forced Rayleigh scattering signals

Spiegel

Sprinkle

Chang

1996

The Journal of Chemical Physics

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Articles you may be interested inComparison between optical nonlinearity relaxation times from coherent secondharmonic generation and from incoherent hyperRayleigh scattering Influence of solvation on the ionization potential of metal clusters AIP Conf. Proc. 298, 541 (1994); 10.1063/1.45414Tracer diffusion in polymer and organic liquids close to the glass transition AIP Conf.We propose a new method for analysis of nonmonotonic forced Rayleigh scattering ͑FRS͒ decay profiles. It is shown that the curvature near the local maximum of a decay-grow-decay profile or a grow-decay profile can be used to determine directly the geometric mean of the unperturbed and photoproduct diffusion coefficients, which will in many cases mitigate the need to apply multiparameter nonlinear fitting routines. FRS tracer-diffusion measurements of methyl red in poly͑vinyl acetate͒/toluene solutions at two different probe wavelengths, analyzed using the new method, are in good agreement with results of previous studies. Simulations are used to estimate the systematic error due to the approximation employed, and it is concluded that accuracies of a few percent or better should be routinely achievable in most cases. We have, in addition, investigated the probe-wavelength dependence of the profile shape for this system.

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Polymer/probe interaction in probe diffusion through a polymer matrix: methyl red diffusion in poly(vinyl acetate)/toluene solutions

Cited by 31 publications

References 4 publications

On the suitability of nanocrystalline ferrites as a magnetic carrier for drug delivery: Functionalization, conjugation and drug release kinetics

On the suitability of nanocrystalline ferrites as a magnetic carrier for drug delivery: Functionalization, conjugation and drug release kinetics

Diffusion studies through fluorescence recovery after photobleaching in hydrated polyamides

Curvature-based analysis of nonmonotonic forced Rayleigh scattering signals

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