Aldrich Polymer Products Applicaton & Reference Information
Solubility parameter values are based on heats of vaporization. The values obtained with this method give estimates of solu-tion behavior. It is recommended that the reader consult the reference given below2 or other references for a more detailed explanation of δ values. Table II: Solubility Parameters for Plasticizers and Solvents
Solubility of Plasticizers, Polymers and Environmental
(3) χ = (δ p δ pl) 2 V r (R T) 1 where V r is an average volume of plasticizer molecule and polymer repeated units and δ p and δ pl are solubility parameters for polymer and plasticizer. Therefore, one of the most common approaches is to use the δ values of both components for the initial estimation of compatibility.
Comparison of the Density and Solubility Parameter of Pure
The calculated solubility parameters for the pure plasticizers and PVC (previously listed in Table 3) are replotted in Figure 9 for easier comparison. Plasticizers all have much higher δ...
Selecting Plasticizers for Adhesives and Sealants
Plasticizers that are used in adhesive and sealant formulations are generally chosen on the basis of the following criteria: Compatibility with a given polymer or set of component ingredients. Compounding characteristics. Effect of plasticizer on the rheological properties of the polymer.
AQUACOAT ECD: CRITICAL FORMULATION ATTRIBUTES OF PLASTICIZER
functions, plasticizer can also be used as an additive to influence drug release rates. 1. Plasticizer amount. Plasticizer selection is determined mainly . by glass transition temperature and solubility parameters. The concentration and type of plasticizer in a coating formulation should be optimized as it plays a critical role in controlling film
- Are plasticizers miscible with API and polymer?
- Based on the solubility parameter, plasticizers such as SA, GB, and PEG showed Δδ (API) and Δδ (polymer) < 7 MPa ½, and they are likely to be miscible with the API and polymer. These plasticizers are expected to form a one-phase system with the INM-EPO mixture.
- Are plasticizers more soluble than PVC?
- The calculated solubility parameters for the pure plasticizers and PVC (previously listed in Table 3) are replotted in Figure 9 for easier comparison. Plasticizers all have much higher δ than PVC, and its value decreases monotonically with the alkyl side chain length. ...
- Which solid-state plasticizers are used in a chemistry study?
- Solubility parameters, thermal analysis, and rheological evaluation were used as assessment tools. Based on comparable solubility parameters, stearic acid, glyceryl behenate, and polyethylene glycol 8000 were selected as solid-state plasticizers.
- What is the solubility parameter of pure PVC system?
- As shown in Fig. 6 d, the solubility parameter of pure PVC system is 18.47 (J cm −3) 1/2, which is similar to the calculated structure in the literature.
- What is a good plasticizer concentration?
- In practical formulations the plasticizer concentration usually varied from 5 to 40 wt%. Plasticizers play also an important role as processing aids. They act as lubricants, reduce adhesion to metal surface, lower processing temperature, reduce melt viscosity, improve ductility and lower film forming temperature in dispersions.
- Are plasticizers miscible?
- Greenhalgh et al. 40 have demonstrated that components with solubility differences of less than 7 MPa ½ are likely to be miscible. Thus, plasticizers with solubility parameters in range of 17-31 MPa ½ are likely to show complete or partial miscibility with INM.
