Plasticizer - an overview | ScienceDirect Topics
The molar mass and physical size of the plasticizer and the solubility parameters of PVC plasticizers have the major effect on the dipole attraction and thus the final properties of a flexible compound. Phthalates and adipates are the most commonly used plasticizers.
Structure Design, Performance Simulation and Plasticizing
To appraise extraction stability of the plasticizer, the samples of PVC blends with dimension 10 × 10 × 1 mm 3 were immersed in 100 mL liquids at 25 ℃. The liquids were selected as water, ethanol, cyclohexane, petroleum ether. After extraction, the samples were fully dried under vacuum until the weights of the samples were constant. Migration Test.
Comparison of the Density and Solubility Parameter of Pure
The resultant BILP-5 membrane shows good stability and a high H2/CO2 selectivity of 16 with a H2 permeance of 362 GPU under mixed gas test at room temperature, which exceeds the 2008 upper...
Critical Assessment of the Hildebrand and Hansen Solubility
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 Hildebrand and Hansen solubility parameter models. Both models are built on the basis of the notion of “like dissolves like” and identify a liquid as a good solvent for a
Interfacial effects of plasticizers on the properties
Table 2 lists the different solubility parameters and the IRs of the plasticizers and CDA calculated according to Eq. ( 4 ). DA have the lowest IR, 2.3 (J cm 3) 0.5, probably, suggesting that it is the most suitable plasticizer for CDA.
- 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. ...
- 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.
- What are Hansen Solubility Parameters in polymer additives?
- Polymer additives can be assigned Hansen solubility parameters (HSP). Potential predictions of the physical behavior of polymeric additives in polymers are therefore possible. This allows systematic studies of compatibility, surface affinities, and the like to improve the performance of the coatings and plastics containing these additives.
- Can a polymer have limited solubility?
- Limited solubility of the additive in a given polymer may also be acceptable, but limited solubility can also lead to problems. Temperature effects can become very important when the amount of additive in a polymer is close to the solubility limit at the temperature of use.
- 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 ).
- Why are plasticizers characterized by HSP?
- Many plasticizers have been characterized by HSP and their general behavior with regard to solubility and compatibility follows that of the solvents. Some differences are encountered due to generally higher molecular weights. This means lowered compatibility in boundary situations, and slower transport (diffusion) through polymer matrices.
