Crystallization of oligo(ethylene glycol) in the presence of carbon tetrachloride

Dvoyashkin, N.K.; Maklakov, A.I.; Смирнов, В. С.

doi:10.1016/0032-3950(79)90131-x

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…The diffusion of small molecules in polymer solutions and gels has been a subject of increasing research interest in the past decade. − The understanding of the diffusion of small molecules in polymers is useful and important for the processes involving the devolatilization of monomer and solvent from polymer products, controlled release of drugs, membrane permeation, transport in porous medium, , electrophoresis and gel filtration, , etc. With the development of more convenient experimental techniques such as pulsed field gradient NMR spectroscopy, , more diffusion data have become available. ,,, The interpretation of the results has not been always easy ,− even with the availability of numerous physical models of diffusion in the literature. − In fact, there remains disagreement regarding the applicability of the models for various polymer systems.…”

Section: Introductionmentioning

confidence: 99%

“…The diffusion of small molecules in polymer solutions and gels has been a subject of increasing research interest in the past decade. [1][2][3][4][5][6][7][8][9][10] The understanding of the diffusion of small molecules in polymers is useful and important for the processes involving the devolatilization of monomer and solvent from polymer products, 11 controlled release of drugs, 12 membrane permeation, 13 transport in porous medium, 14,15 electrophoresis and gel filtration, 16,17 etc. With the development of more convenient experimental techniques such as pulsed field gradient NMR spectroscopy, 18,19 more diffusion data have become available.…”

Section: Introductionmentioning

confidence: 99%

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Self-Diffusion of End-Capped Oligo(ethylene glycol)s in Poly(vinyl alcohol) Aqueous Solutions and Gels

Masaro

Zhu

1999

Macromolecules

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We have studied the self-diffusion of a series of end-capped ethylene glycol and oligo(ethylene glycol)s in poly(vinyl alcohol) aqueous solutions and gels by pulsed-gradient spin echo NMR spectroscopy. The end groups of the diffusants include small flexible groups (methyl, ethyl, hexyl) and bulky rigid groups (tert-butyl and aromatic groups). The effect of the size and geometry of the end groups on the self-diffusion coefficients of the derivatives of ethylene glycol and of oligo(ethylene glycol)s is investigated. The diffusion data are analyzed with several physical models of diffusion based on different physical concepts to test their applicabilities. The variation of the parameters used in these diffusion models with the size and geometry of the diffusants is also discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Self-Diffusion of End-Capped Oligo(ethylene glycol)s in Poly(vinyl alcohol) Aqueous Solutions and Gels

Masaro

Zhu

1999

Macromolecules

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“…The diffusion of polymers in polymer solutions and gels has been the subject of increasing research interest in the past decade 1–5. The diffusion of polymers in gels is relevant to the diffusion of polymers in porous media and enhanced oil recovery 6–8. This topic is also important in solving a number of biological problems 9…”

Section: Introductionmentioning

confidence: 99%

A study of mass transport of linear polystyrene in polyethyl methacrylate gel by dynamic light scattering

Zuo

Huang

et al. 2002

J of Applied Polymer Sci

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Mass [i.e., linear polystyrene (PS) probe] transports in polyethyl methacrylate (PEMA) gels with ethylene dimethacrylate (EDMA) as crosslinker were studied by dynamic light scattering (DLS). For PEMA gels in toluene, we have established that it is a very well matched system, so that it is very convenient to study the mass transport of the PS macromolecule in such a system. Experiments show that the obstruction effects of PEMA gels for the mass transport of PS are obvious. Reasonably, the lower the gel obstruction for mass transport, the higher the diffusion coefficient D t of PS in gel. Moreover, the larger the molecular weight of PS, the greater the obstruction effect of the gel. Furthermore, we traced quantitatively the evolution of D t of PS during the crosslinking copolymerization of PEMA. The results show that, after the reaction, the obstacle for mass transport in the gel develops gradually.

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Rates of Crystallization of Polymers

Magill

1999

The Wiley Database of Polymer Properties

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Crystallization of oligo(ethylene glycol) in the presence of carbon tetrachloride

Cited by 3 publications

References 4 publications

Self-Diffusion of End-Capped Oligo(ethylene glycol)s in Poly(vinyl alcohol) Aqueous Solutions and Gels

Self-Diffusion of End-Capped Oligo(ethylene glycol)s in Poly(vinyl alcohol) Aqueous Solutions and Gels

A study of mass transport of linear polystyrene in polyethyl methacrylate gel by dynamic light scattering

Rates of Crystallization of Polymers

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