PMMA or PEO in THF/H2O mixture: phase diagram, separation mechanism and application

Schuhmacher, Elcio; Soldi, Valdir; Pires, Alfredo T. N.

doi:10.1016/s0376-7388(00)00624-4

Cited by 26 publications

(25 citation statements)

References 10 publications

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“…In contrast, during NG, q max first shifts toward larger q values because more particles appear that promote the decrease of the distance R (R = 2π/q max ) between particles [36,37], then shifts toward smaller q values due to particles coarsening [10]. For NG early stages, possibly after an induction period, I (q) evolves as I (q) = K(t − τ ) 2n , where K is the growth constant, τ is the initial time (fixed to zero at will), and t is the time for phase separation [38,39]. In the case of spherical nuclei, the exponent n has a value of 3/2 for diffusion-controlled growth and 3 for interfacially-controlled growth [38].…”

Section: Discussionmentioning

confidence: 99%

Complex coacervation between β-lactoglobulin and Acacia gum: A nucleation and growth mechanism

Sánchez

Mekhloufi

Renard

2006

Journal of Colloid and Interface Science

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Section: Discussionmentioning

confidence: 99%

Complex coacervation between β-lactoglobulin and Acacia gum: A nucleation and growth mechanism

Sánchez

Mekhloufi

Renard

2006

Journal of Colloid and Interface Science

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“…PEO/PMMA IPNs combine hydrophilic PEO with hydrophobic PMMA. It turned into a phase‐separated system after the crosslinking reaction 10, 11. If the crosslinking density of PEO is small (i.e., the number of monomer units between crosslinks is high), then during the polymerization of network PMMA, the growing PMMA chains will push apart the already existing PEO chains, and a phase‐separated IPN will be obtained.…”

Section: Introductionmentioning

confidence: 99%

“…It turned into a phase-separated system after the crosslinking reaction. 10,11 If the crosslinking density of PEO is small (i.e., the number of monomer units between crosslinks is high), then during the polymerization of network PMMA, the growing PMMA chains will push apart the already existing PEO chains, and a phase-separated IPN will be obtained. However, if the crosslinking density of PEO is high, the positions of the PEO chains will hardly be changed and the PMMA network will grow by interpenetrating the existing PEO network.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterizations of interpenetrating polymer network hydrogels of poly(ethylene oxide) and poly(methyl methacrylate)

Kim

Lee

Kim

et al. 2003

J of Applied Polymer Sci

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ABSTRACT:Interpenetrating polymer network (IPN) hydrogels based on poly(ethylene oxide) and poly(methyl methacrylate) were prepared by radical polymerization using 2,2-dimethyl-2-phenylacetophenone and ethylene glycol dimethacrylate as initiators and crosslinkers, respectively. The IPN hydrogels were analyzed for sorption behavior at 25°C and at a relative humidity of 95% using dynamic vapor sorption. The IPN hydrogels exhibited a relatively high equilibrium water content in the range of 13-68%. The state of water in the swollen IPN hydrogels was investigated using differential scanning calorimetry. The free water in the hydrogels increased as the hydrophilic content increased.

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“…12 Recently, Schuhmacher et al investigated the liquid-liquid phase-separation mechanism via NG by light scattering and determined the growth constants in different component concentrations. 13 In our previous study, the phase-separation mechanism in the dry-cast process was studied in the cellulose acetate/dimethylformamide (DMF)/2-methyl-2,4-pentanediol (MPD) system.…”

Section: Introductionmentioning

confidence: 99%

Light‐scattering study on porous membrane formation by dry‐cast process

Matsuyama

Tachibana

Maki

et al. 2002

J of Applied Polymer Sci

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ABSTRACT:The phase-separation mechanism during porous membrane formation by the dry-cast process was investigated by the light-scattering method in poly(methyl methacrylate)/ethyl acetate (EA)/2-methyl-2,4-pentanediol system. The evaporation of EA from the cast solution induced the phase separation and thus the porous membrane was obtained. By the light-scattering measurement on the phase-separation kinetics, the phase separation was found to occur by a spinodal decomposition mechanism. As the amount of nonsolvent in the cast solution decreased, the structure growth rate decreased and the growth stopped soon. The obtained porous structure was isotropic rather than asymmetric. The average interpore distances obtained from the SEM observation roughly agreed with the final constant interphase periodic distances measured by the light-scattering method.

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PMMA or PEO in THF/H2O mixture: phase diagram, separation mechanism and application

Cited by 26 publications

References 10 publications

Complex coacervation between β-lactoglobulin and Acacia gum: A nucleation and growth mechanism

Complex coacervation between β-lactoglobulin and Acacia gum: A nucleation and growth mechanism

Preparation and characterizations of interpenetrating polymer network hydrogels of poly(ethylene oxide) and poly(methyl methacrylate)

Light‐scattering study on porous membrane formation by dry‐cast process

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