Miscibility of poly(2-chlorostyrene) and poly(vinyl methyl ether) blends

Tran-Cong, Qui; Nakano, Hiroshi; Okinaka, Jin; Kawakubo, Rie

doi:10.1016/0032-3861(94)90018-3

Cited by 19 publications

(18 citation statements)

References 19 publications

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“…However, the phase‐separation temperature for SMI/PVME is generally higher than that for SMA/PVME blends. The imidization reaction increases the amount of phenyl ring in SMA, which may improve the miscibility between the blend components because the electron long pairs of the PVME oxygens interact more with the π electrons of the benzene rings on SMA 15, 16. It can also be seen from Figure 4(a) that the T g curve of SMI/PVME blends is a little higher than that of SMA/PVME.…”

Section: Resultsmentioning

confidence: 93%

“…The imidization reaction increases the amount of phenyl ring in SMA, which may improve the miscibility between the blend components because the electron long pairs of the PVME oxygens interact more with the p electrons of the benzene rings on SMA. 15,16 It can also be seen from Figure 4(a) that the T g curve of SMI/PVME blends is a little higher than that of SMA/PVME. Figure 6(b) shows that for an SMA concentration less than 70 wt %, the phase-separation temperatures for SMA/ PMMA blends have a low dependence on the SMA concentration.…”

Section: Characterization Of the Phase Separation Of Sma-and Smi-basementioning

confidence: 86%

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Effect of poly(styrene‐co‐maleic anhydride) imidization on the miscibility and phase‐separation temperatures of poly(styrene‐co‐maleic anhydride)/poly(vinyl methyl ether) and poly(styrene‐co‐maleic anhydride)/ poly(methyl methacrylate) blends

Fang

Mighri

Ajji

2008

J of Applied Polymer Sci

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The objective of this work was to study the miscibility and phase-separation temperatures of poly(styrene-co-maleic anhydride) (SMA)/poly(vinyl methyl ether) (PVME) and SMA/poly(methyl methacrylate) (PMMA) blends with differential scanning calorimetry and small-angle light scattering techniques. We focused on the effect of SMA partial imidization with aniline on the miscibility and phaseseparation temperatures of these blends. The SMA imidization reaction led to a partially imidized styrene N-phenyl succinimide copolymer (SMI) with a degree of conversion of 49% and a decomposition temperature higher than that of SMA by about 208C. We observed that both SMI/PVME and SMI/PMMA blends had lower critical solution temperature behavior. The imidization of SMA increased the phase-separation temperature of the SMA/PVME blend and decreased that of the SMA/PMMA blend.

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Section: Resultsmentioning

confidence: 93%

Section: Characterization Of the Phase Separation Of Sma-and Smi-basementioning

confidence: 86%

Effect of poly(styrene‐co‐maleic anhydride) imidization on the miscibility and phase‐separation temperatures of poly(styrene‐co‐maleic anhydride)/poly(vinyl methyl ether) and poly(styrene‐co‐maleic anhydride)/ poly(methyl methacrylate) blends

Fang

Mighri

Ajji

2008

J of Applied Polymer Sci

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“…Here, is the dimensionless parameter that is usually obtained experimentally by fitting the curve (e.g. See [67]). For UCTS, it often takes the form:…”

Section: Chapter 3 Theoretical Backgroundmentioning

confidence: 99%

Computational study of comprehensive methods of initiating phase separation within metastable regions and obtaining some notable patterns in unstable region

Duc¹

2021

Preprint

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Binary phase polymer solution is interesting in that they expresses double-well local energy behavior, which means phase separation is preferred when condition is right. It is a feature that has been used to fabricate functional polymeric materials such as PDLC films for electro-optical devices (e.g. flat-panel displays and switchable windows). A uniformly mixed solution may be in one of three state: unstable, stable, or metastable. If the solution is unstable, then phase separation is spontaneous and proceeds by spinodal decomposition. If the solution is metastable, then the solution must overcome certain activation barrier for phase separation to proceed spontaneously. The activation barrier is usually the thermal noise or the fluctuation created by some external influence. This mechanism is called nucleation-and-growth. Manipulating morphology of phase separation has been of some great research interest because of its practical use. While spinodal decomposition has been well-studied, there are several other methods to further control morphology. For this thesis, the following methods are considered: double quench, anisotropic quenching with varying temperature or polymerization, surface-directed wetting, and concentration gradient. The methods are carried out within metastable or unstable regions or both. To numerically model, Cahn-Hilliard theory and FloryHuggins’ theory are used. This thesis is to also demonstrate that, present numerical method is very efficient and can work on complex geometry.

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“…Theoretical [1][2][3][4][5][6][7][8] as well as experimental [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] work has been reported with the aim of a better understanding how to predict the extent of polymer-polymer compatibility. More precisely, from a thermodynamic viewpoint a variety of theories for polymer solutions and blends have been developed during the last 50 years.…”

Section: Introductionmentioning

confidence: 99%

Theoretical evaluation ofKp in size-exclusion chromatography from a thermodynamic viewpoint

Gómez

Garcı́a

Figueruelo

et al. 2000

Macromol. Chem. Phys.

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The Flory‐Huggins formalism developed for a ternary solvent(1)‐polymer(2)‐polymer(3) system has been used to evaluate the binary and ternary interaction functions. The raw data are the two‐phase equilibrium compositions of the three components determined by liquid chromatography. These interaction functions have been used to evaluate theoretically the distribution coefficient of solute‐gel interactions in size exclusion chromatography (SEC), Kp. For a system solvent(1)‐polymer(2)‐gel matrix(3), a new expression for Kp has been obtained from a thermodynamic point of view. The proposed equation is a function of the fraction of gel matrix in the ternary phase, of the molar volumes of solvent and polymer and of the binary and ternary interaction functions. For the systems studied, values of Kp higher and lower than unity have been obtained at different hydrodynamic volumes which evidences the existence of secondary mechanisms. These calculations lead to a better understanding of the separation mechanism in chromatographic experiments.

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Miscibility of poly(2-chlorostyrene) and poly(vinyl methyl ether) blends

Cited by 19 publications

References 19 publications

Effect of poly(styrene‐co‐maleic anhydride) imidization on the miscibility and phase‐separation temperatures of poly(styrene‐co‐maleic anhydride)/poly(vinyl methyl ether) and poly(styrene‐co‐maleic anhydride)/ poly(methyl methacrylate) blends

Effect of poly(styrene‐co‐maleic anhydride) imidization on the miscibility and phase‐separation temperatures of poly(styrene‐co‐maleic anhydride)/poly(vinyl methyl ether) and poly(styrene‐co‐maleic anhydride)/ poly(methyl methacrylate) blends

Computational study of comprehensive methods of initiating phase separation within metastable regions and obtaining some notable patterns in unstable region

Theoretical evaluation ofKp in size-exclusion chromatography from a thermodynamic viewpoint

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