Polymer additives and solubility parameters Kinam Park
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Hansen solubility parameters (HSP), just like polymers. These usually have the symbols δD, δP, and δH, which are sometimes replaced by D,P,and H,for convenience. The assignment of
The calculation results of Hansen solubility parameters also illustrated that DOP had better compatibility with PVC than TBC. Although our previous studies have shown that
Prediction of plasticizer solvency using hansen solubility
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Apr 16, 2004Hansen's three-dimensional solubility parameters provide a quantitative measure of these interactive forces. By using CO-ACT SM service, a computer program designed for
Plasticizer Characteristics Name Solubility parameter (J1/2cm-3/2) Weight Loss (%) Viscosity (mPas, 20°C) Molecular weight (g/mol) PVC 19.40 Pevalen 18.39 11 35 472 DOTP 17.94 15
Polymer-plasticizer compatibility during coating formulation:
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A good choice of a plasticizer depends on its compatibility with the polymer and on the permanence of the plasticizer in the film during coating. [37] used molecular simulations
Solubility parameters of plasticizer and PVC were studied by the small Eq. (2). Furthermore, the solubility parameter of mixed plasticizer was calculated in terms of the additivity rule in Eq. (2).
Critical Assessment of the Hildebrand and Hansen
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Solubility parameter models are widely used to select suitable solvents/nonsolvents for polymers in a variety of processing and engineering applications. In this study, we focus on two well-established models, namely,
The solubility parameter is an index related to the polarity; similar values for PVC and plasticizer indicate good compatibility . Compatibility between PVC and the plasticizer was
API and Polymer Selection: Formulation and Process Variables
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Apart from improving process parameters and stability, adding plasticizers also influences the solubility and drug dissolution from the polymeric carriers depending on the nature of the plasticizer added. This improvement may be due to improved diffusion of drug in the polymer, improved wetting, or reduced tensile strength of the polymer.
A good choice of a plasticizer depends on its compatibility with the polymer and on the permanence of the plasticizer in the film during coating. [37] used molecular simulations to calculate the solubility parameter and found good agreement with the experimental solubility parameter values. 3.3.2.2. Computation of the solubility parameter