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Bochek, A. M.; Забивалова, Н. М.; Лаврентьев, В. К.; Lebedeva, M. F.; Sukhanova, T. E.; Petropavlovskii, G. A.

doi:10.1023/a:1013774800778

Cited by 16 publications

(13 citation statements)

References 9 publications

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“…This indicates that the mechanism of gelation in DMF is different from that in an aqueous MC system. DMF can form two hydrogen bonds with MC and can interact with methoxy groups of the polymer by a dipole–dipole interaction, as shown in Scheme 11. Sealed tubes containing equal volumes of hot MC solutions (having different concentrations) at 80°C were placed in a sink at −10°C.…”

Section: Resultsmentioning

confidence: 99%

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Thermogelation of methylcellulose from solution in N,N‐dimethylformamide and characterization of the transparent gels

Singh

Kundu

2008

J of Applied Polymer Sci

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A transparent gel was prepared through the cooling of a methylcellulose (MC) solution in N,Ndimethylformamide (DMF) at 808C to a lower temperature. The temperature at which gelation occurred was dependent on the concentration of the solution. The gel temperature increased with an increase in the concentration of MC. The gelation of MC in DMF was studied by means of optical microscopy (OM), differential scanning calorimetry, and dynamic mechanical analysis (DMA). The OM studies revealed the presence of loosely bound beads of MC with DMF at a lower concentration. These beads became interconnected to rods, and subsequently, a continuous, thick gel was formed as the concentration increased. From DMA studies, it was observed that the loss modulus of the gel crossed over the storage modulus at two different frequencies. This indicated the presence of two types of network structures generated from the weak and strong associations of MC with the organic solvent DMF.

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Section: Resultsmentioning

confidence: 99%

“…A comparison of MC films made from aqueous and dimethylacetamide solutions was reported by Bochek et al11 They also tried to explain the mechanism of gelation from an organic solvent (dimethylacetamide). To date, there is no published work on the thermogelation and rheology of MC– N,N ‐dimethylformamide (DMF) gels.…”

Section: Introductionmentioning

confidence: 97%

Thermogelation of methylcellulose from solution in N,N‐dimethylformamide and characterization of the transparent gels

Singh

Kundu

2008

J of Applied Polymer Sci

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“…The long organic tail in CTAB gets solubilized in the hydrocarbon phase of MC. On the other hand, MC can form H‐bonds with DMF 13. Thus, MC binds itself both to CTAB and DMF.…”

Section: Resultsmentioning

confidence: 99%

“…Bochek et al13 compared the properties of MC films cast from aqueous and dimethylacetamide (DMAc) solution. Although, they reported the mechanism of the gelation of MC in DMAc, there is no report on the thermoreversibility and rheology of the MC‐DMF gels.…”

Section: Introductionmentioning

confidence: 99%

Effect of addition of surfactants on the rheology of gels from methylcellulose in N,N‐dimethylformamide

Kundu

Singh

2008

J of Applied Polymer Sci

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The effect of highly substituted cationic cetyl trimethyl ammonium bromide (CTAB), less substituted cationic hexadodecyl ammonium bromide (HDAB), CTABand HDAB-modified montmorillonite (CTABMONT and HDABMONT), and nonionic surfactants on the rheological properties of methylcellulose (MC) N,N-dimethylformamide (DMF) gels have been studied. The storage modulus of the MC-MDF gels increases with an increase in frequency. During the frequency scan, the storage and loss modulus of MC-DMF gel crosses over each other at two different frequencies. At the crossover points, the loss tangent is found to be unity. The addition of CTAB-and HDAB-modified nanofiller increases in the gel strength of MC-DMF gel. The storage modulus of MC-DMF gel in the presence of CTABMONT is found to be higher than that of CTAB-modified MC-DMF gel. Whereas, the storage modulus of MC-DMF gel in the presence of HDABMONT is lower than that of HDAB-modified MC-DMF gel. On the other hand, the addition of nonionic surfactant (Brij78) decreases the gel strength.

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“…The sample masses were 4-6 mg. Figure 1 presents the diffraction patterns of the composite films. For MC obtained from aqueous solu tion characteristic reflections at 2θ = 8.0° and 21.8°, which respectively refer to the (110) and (020) planes (curve 1), are observed [21,25,26]. The diffraction pattern of AG illustrates only one spread out reflec tion at 2θ = 19.0°-20.0° (Fig.…”

Section: Methodsmentioning

confidence: 97%

Properties of composite films of methylcellulose with arabinogalactan

et al. 2015

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The stress-strain properties of composite films obtained from aqueous solutions of methylcellulose with arabinogalactan are studied. The structural organization and thermal stability are investigated via X ray diffraction, dynamic mechanical analysis, differential scanning calorimetry, and ther mogravimetric analysis. The compositions for which the polysaccharides are compatible in the solid state are found.

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Cited by 16 publications

References 9 publications

Thermogelation of methylcellulose from solution in N,N‐dimethylformamide and characterization of the transparent gels

Thermogelation of methylcellulose from solution in N,N‐dimethylformamide and characterization of the transparent gels

Effect of addition of surfactants on the rheology of gels from methylcellulose in N,N‐dimethylformamide

Properties of composite films of methylcellulose with arabinogalactan

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