Phase separation temperatures in the polystyrene—poly(α-methyl styrene)—methylcyclohexane system

Saeki, Susumu; Narita, Y.; Tsubokawa, Masakazu; Yamaguchi, Takuji

doi:10.1016/0032-3861(83)90183-0

Cited by 7 publications

(4 citation statements)

References 22 publications

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“…(5) Our measurements are not consistent with those of Saeki et al (1983), as is clear from Figure 1. The polymer sample used by Saeki et al was characterized only by M w ) 6.0 × 10 4 .…”

Section: Resultscontrasting

confidence: 64%

“…We present here new measurements of the liquidliquid phase separation curves of poly(R-methylstyrene) + methylcyclohexane, using three well-characterized samples of poly(R-methylstyrene). We compare our data with the data of Saeki (1983) and find poor agreement.…”

Section: Introductionmentioning

confidence: 63%

“…Poly(R-methylstyrene) is a polymer of interest both in basic polymer science (Selser, 1985) and in industrial processes, such as the fabrication of laser fusion targets (Letts et al, 1995). So far as we can determine, the only published report of a liquid-liquid phase diagram of poly-(R-methylstyrene) in a poor solvent is that of Saeki et al (1983). We present here new measurements of the liquidliquid phase separation curves of poly(R-methylstyrene) + methylcyclohexane, using three well-characterized samples of poly(R-methylstyrene).…”

Section: Introductionmentioning

confidence: 99%

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Phase Separation Curves of Poly(α-methylstyrene) in Methylcyclohexane

1999

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We report new measurements of the liquid−liquid phase separation curves of poly(α-methylstyrene) + methylcyclohexane, for three well-characterized samples of the polymer with number average molecular weights of (A) 19 700, (B) 32 300, and (C) 72 000 g/mol. Sample A (polydispersity index PI = 1.02) has a critical point at a mass fraction m c of polymer of 0.20 ± 0.02 and a critical temperature T c at (305.70 ± 0.09) K. The critical point for sample A is not at the apex of the phase separation curve, which indicates that the polymer was not sufficiently monodisperse to behave as one component. Sample B (PI = 1.02) has m c = 0.15 ± 0.02 and T c = (318.3 ± 0.4) K; this critical point is at the apex of the phase separation curve within our resolution. Sample C (PI = 1.05) has m c = 0.11 ± 0.02 (not the apex of the curve) and T c = (328.9 ± 0.4) K. From these measurements, we find a theta temperature ϑ of (357 ± 5) K and an entropy of dilution parameter ψ1 of 0.49 ± 0.06. The polymer/solvent interaction parameter χ1 at T c for each sample is (A) 0.54 ± 0.01, (B) 0.56 ± 0.01, and (C) 0.58 ± 0.01. The uncertainties for ϑ, ψ1, and χ1 are given as one standard deviation.

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“…(5) Our measurements are not consistent with those of Saeki et al (1983), as is clear from Figure 1. The polymer sample used by Saeki et al was characterized only by M w ) 6.0 × 10 4 .…”

Section: Resultscontrasting

confidence: 64%

Section: Introductionmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

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Phase Separation Curves of Poly(α-methylstyrene) in Methylcyclohexane

1999

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“…Soon after, Tompa 11 succeeded in deriving the rigorous equations giving SC and CSP for these ternary system. Spinodal and plait point conditions obtained by him are, 11 · 1 2 (1)…”

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confidence: 99%

Phase Equilibria of Quasi-Ternary Systems Consisting of Multicomponent Polymers 1 and 2 in a Single Solvent I. Spinodal Curve and Critical Solution Point

Kamide¹,

Matsuda²,

Shirataki³

1988

Polym J

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ABSTRACT:Theoretical equations of spinodal and neutral equilibrium conditions were derived, based on modified Flory-Huggins theory and without further approximation, for quasiternary solutions consisting of a multicomponent polymer I/multicomponent polymer 2/single solvent. Numerous and systematic computer experiments clarified the effects of three thermodynamic interaction parameters between solvent-polymer I (X01 ), solvent-polymer 2 (x02), and polymer I-polymer 2 (X12), the weight average degrees of polymerization of original polymers I and 2 (Xw° and Yw 0 ) (1)(3b)and X 12 , the thermodynamic interaction parameter between polymers 1 and 2; v 0 , v 1 , 949

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Appendices

1993

Handbook of Polymer Solution Thermodynamics

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Phase separation temperatures in the polystyrene—poly(α-methyl styrene)—methylcyclohexane system

Cited by 7 publications

References 22 publications

Phase Separation Curves of Poly(α-methylstyrene) in Methylcyclohexane

Phase Separation Curves of Poly(α-methylstyrene) in Methylcyclohexane

Phase Equilibria of Quasi-Ternary Systems Consisting of Multicomponent Polymers 1 and 2 in a Single Solvent I. Spinodal Curve and Critical Solution Point

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