Concentration dependency of interaction parameter between PVC and plasticizers using inverse gas chromatography

Abstract

The inverse gas chromatography method was extended to study the concentration dependent FloryHuggins interaction parameter between poly(vinyl chloride) (PVC) and plasticizers using literature data. For both PVC/ polyadipate and PVC/epoxidized soybean oil (ESO) systems, the miscibility was better at the high PVC end. The specific interaction between PVC and plasticizers was estimated from the difference between the experimental results and the enthalpies of mixing predicted by the solubility parameter model. The interaction was negative and skewed toward the high PVC end, and rendered the overall interaction parameter negative at high PVC compositions. Chemical potential was used to determine the phase composition of PVC/plasticizer mixtures.

Multiparameter solubility model of fullerene C60

“…In previous studies a method to examine the confidence interval for parameters of the one-dimensional solubility parameter model was discussed [34,35]. The method used a linearized expression for the sum of error square around the optimum values of parameters.…”

“…The value of the confidence interval can be determined by a diagonalization process, which turns the matrix A into a diagonalized matrix [37]. This was demonstrated in the one-dimensional case [34,35]. When the components of solvents were distributed on both sides of the optimum values the correlation between parameters was low and the cross terms A ij (i = j) were small.…”

“…By using a linearization method around the optimum values of the five parameters, the approximate joint confidence contour of Eq. (10) can be expressed as a quadratic form using the relative values of λ, τ, q 2 , α, and β to their optimum values as the variables [34][35][36]:…”

Inverse Gas Chromatography in Characterization of Composites Interaction

“…As the reference volume they used molar volume of the smallest repeated unit of polymer. Jan-Chan Huang [Huang, 2003] and with R. Deanin [Huang & Deanin, 2004] Jan-Chan Huang [Huang, 2006] used also solubility parameter model to the study of the miscibility and thermodynamic properties of solutions by means of IGC. Because polymerpolymer mixtures have little entropy of mixing, the miscibility is largely decided by the sign of the heat of mixing.…”

Biobased cyanate ester composites with epoxidized soybean oil and in situ generated nano‐silica

“…Epoxidized soybean oil (ESO) is currently mainly used as a plasticizer or stabilizer to modify the properties of plastic resins such as PVC [16]. Currently, ESO is also beginning to be applied as a reactive modifier or diluent for other polymer systems.…”