Polymer-polymer mutual diffusion using transmission FTIR spectroscopy

High, Martin S.; Painter, Paul C.; Coleman, Michael M.

doi:10.1021/ma00028a045

Cited by 40 publications

(29 citation statements)

References 11 publications

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“…PAAm and PAAc are known to form complexes which dissociate at 25 mixtures.14 '16-19 By contrast, complexes obtained by mixing PDMAAm and PAAc aqueous solutions were observed in water at 70 °C. This reflects the enhanced stability of intermolecular complexes formed by PDMAAm and PAAc in aqueous solution.…”

Section: Resultsmentioning

confidence: 99%

Temperature-Responsive Interpenetrating Polymer Networks Constructed with Poly(acrylic acid) and Poly(N,N-dimethylacrylamide)

Aoki¹,

Kawashima²,

Katono³

et al. 1994

Macromolecules

299

205

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Complex formation between PDMAAm as a hydrogen-bonding acceptor and PAAc as a hydrogenbonding donor, the temperature dependence of the equilibrium swelling for interpenetrating polymer network (IPN) hydrogels composed of PDMAAm and PAAc, and changes in ketoprofen release of these IPN hydrogels were investigated. Interpolymer complexes between PDMAAm and PAAc were very stable at 70 °C in aqueous solution. Dissociation temperatures of the complex between poly(DMAAm-co-AAm) and PAAc shifted to higher values with increasing DMAAm content. These IPNs composed of poly(DMAAm-co-AAm) and PAAc showed limited swelling ratios between their swelling transition temperatures and lower swelling ratios above these transition temperatures. Transition temperatures shift to higher values with increasing DMAAm content. Reversible and pulsatile solute release, reflecting the "on" state at higher temperatures and the "off" state at lower temperatures, was achieved by fabricating these IPN hydrogels.

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Section: Resultsmentioning

confidence: 99%

Temperature-Responsive Interpenetrating Polymer Networks Constructed with Poly(acrylic acid) and Poly(N,N-dimethylacrylamide)

Aoki¹,

Kawashima²,

Katono³

et al. 1994

Macromolecules

299

205

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“…Therefore, characterization of the interphase constructed by macromolecular diffusion in immiscible polymer blends is meaningful for polymer engineering and science, including adhesion, phase separation through spinodal decomposition and polymer blend interface modification. 14,15 So far, several methods have been developed to quantify the diffusion behavior in polymer blends, including secondary ion mass spectroscopy (SIMS), 16 forward recoil spectrometry (FRS), 17 neutron reflectometry (NR), 18 positron annihilation lifetime spectroscopy (PALS), 19 fluorescence electron spectroscopy (FES), 20 X-ray microanalysis in scanning electron microscopy, 21 transmission FTIR spectroscopy, 22 dynamic light scattering (DLS), 4 etc. It is worth noting, however, that these are best suited for nanoscale film analysis, and often require labeling with exogenous markers (e.g.…”

Section: Introductionmentioning

confidence: 99%

Observation of mutual diffusion of macromolecules in PS/PMMA binary films by confocal Raman microscopy

Chen

et al. 2012

Soft Matter

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“…Many techniques have been developed to measure the diffusion coefficients of small or large molecules in polymer melts or solutions. For example, pulsed field gradient‐nuclear magnetic resonance (PFG‐NMR) spectroscopy,22 X‐ray microanalysis in scanning electron microscopy,23 neutron scattering,24, 25 neutron reflection,26 neutron spin echo,27 forward recoil spectrometry,28 Fourier transform infrared spectroscopy,29 and transmission electron microscopy30 have been used. All these techniques require the samples to be either chemically labeled or spectroscopically differentiated.…”

Section: Introductionmentioning

confidence: 99%

Polymer–polymer mutual diffusion via rheology of coextruded multilayers

Zhao

Macosko

2007

AIChE Journal

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in Wiley InterScience (www.interscience.wiley.com).The mutual diffusion coefficient of a pair of polyethylenes using coextruded multilayers has been measured. Two polyethylenes with different molecular weight were coextruded in 32 alternating layers in about 45 s of contact time. When the multilayer sample was remelted in a parallel plate rheometer, its apparent viscosity increased due to interdiffusion. By following the kinetics of the apparent viscosity increase, the mutual diffusion coefficient was measured. The theory of Kramer et al. (Polymer. 1984; 25:473-480) was used to describe the mutual diffusion coefficient as a function of the chain mobility parameter, molecular weight, and concentration. The finite element method was used to solve the nonlinear interdiffusion problem to give a concentration profile in these multilayers. By fitting the apparent viscosity of the sample vs. time, the chain mobility parameter was found to be 4.5 Â 10 11 m/N s, and the range of the mutual diffusion coefficient for these two PE's was 10 À12 -10 À14 m 2 /s at 2008C (depending on concentration). This is an easy and rapid method to measure the mutual diffusion coefficient for miscible polymers with different melt viscosities.

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Polymer-polymer mutual diffusion using transmission FTIR spectroscopy

Cited by 40 publications

References 11 publications

Temperature-Responsive Interpenetrating Polymer Networks Constructed with Poly(acrylic acid) and Poly(N,N-dimethylacrylamide)

Temperature-Responsive Interpenetrating Polymer Networks Constructed with Poly(acrylic acid) and Poly(N,N-dimethylacrylamide)

Observation of mutual diffusion of macromolecules in PS/PMMA binary films by confocal Raman microscopy

Polymer–polymer mutual diffusion via rheology of coextruded multilayers

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