Interfacial effects of plasticizers on the properties
The fundamental method to evaluate the plasticizing effect is exploring the compatibility between plasticizer and polymer. When analyzing the compatibility between multiphase, the solubility parameter method principle of "similar in cohesive energy density or solubility parameter (δ)" is usually accepted.
Handbook of Plasticizers - 2nd Edition - Elsevier
6.2.3 Methods of experimental evaluation and calculation of solubility parameters of polymers 6.2.3 The methods of calculation of solubility parameters 6.2.4 Multi-dimensional approaches 6.3 Methods of plasticizer selection based on principles of compatibility 6.3.1 How much plasticizer is necessary for a polymer composition?
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 than...
Plasticizer for poly(vinyl chloride) from cardanol as a
The Hansen solubility parameter of PVC and plasticizer can be obtained as the sum of three contributions: (4) δ = (δ d 2 + δ p 2 + δ h 2) 0.5 Where δ d is the contribution of dispersion forces, δ p is the contribution of permanent dipoles, and δ h is the contribution of hydrogen bonding.
Study on compatibility mechanism of plasticizer and asphalt
The molecular properties of asphalt and plasticizer were analyzed using the electric dipole moment, the solubility parameter was used to determine the ease of mixing between them, and finally, the bonding strength was judged by the binding energy.
- 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. ...
- Why are plasticizers soluble in water?
- It arises from hydrophilic–hydrophobic properties of the molecules. Plasticizers, which are mainly the esters of relatively long alcohols, have a solubility in water of less than several milligrams per cubic decimetre (mg/dm 3) (see Table 3 ).
- Does plasticizer molecular structure affect its performance?
- Effects of plasticizer molecular structure on its performance, as measured by performance metrics including its thermodynamic compatibility with PVC, effectiveness of reducing the material’s Young’s modulus, and migration rate in the PVC matrix, are evaluated in the framework of seven molecular design parameters.
- 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.
- Does PSCH plasticizer reduce polarity of PVC molecules?
- The results show that the plasticizing efficiency of PSCH plasticizer is superior to that of other polyester plasticizers, up to 153%. The difference of solubility parameters DS between PSCH and PVC is the smallest, and the decrease of C–Cl bond energy in XPS also proves that PSCH can effectively reduce the polarity of PVC molecules.
- Is plasticizer compatible with a polymer?
- The compatibility of a plasticizer with a given polymer is very important. The maximum amount of plasticizer incorporated into a polymer at the processing temperature and retained by it without exudation during the storage, is commonly accepted as the practical limit of compatibility.
