Dielectric constants of plasticizers as predictors
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Dielectric constants of plasticizers as predictors
tried to add the dipole effect onto the CED effect in predicting solubility-without success. And finally, no one had an adequate method for determining the exact compatibility of a plasticizer with a resin. This is still a major problem. Several methods give approximate results. Excellent compatibility answers, Doolittle suggests ( 8) , may eventually come from the ProusnitzHeil theory (9). In
Effect of plasticizers on ionic conductivity and dielectric
The enhancement of the ionic conductivity depends on the value of dielectric constant of plasticizers. The plasticizers having dielectric constants higher than PEO help to increase the ionic conductivity of PEO-LiClO 4 electrolyte. Addition of DMC in polymer matrix acts as an anti-plasticization effect due to low dielectric constant than that
Plasticizer effect on dielectric properties of poly(methyl
The addition of plasticizer has an effect on enhancing interfacial properties as well as increasing ionic conductivity in polymers. 4,25-28 It is known that ionic conductivity is affected by factors such as anion and cation motion, ion pair formation, amorphous structure of the material, ambient viscosity and high dielectric constant. In this
Plasticizer effect on dielectric properties of poly(methyl
The effect of plasticizer on dielectric properties of poly (methyl methacrylate) (PMMA)/titanium dioxide (TiO 2) composites was investigated. Propylene carbonate (PC) was used as plasticizer in the samples which were prepared with the conventional solvent casting technique.
- What happens if the dielectric constant of a plasticizer is higher?
- The higher value of the dielectric constant of the plasticizer in relation to that of the polymer (PEO) can result in the dissociation of ion aggregates formed at higher concentrations into free ions, which should result in an increase in the number of free mobile ions and hence conductivity.
- Does plasticizer reduce dielectric constant in pp/CB composites?
- The plasticizer has reduced the dielectric constant when it is added to PP/CB composites. The effect is noticeable, especially when the CB loading is high (15 wt% CB), and the plasticizer effect is negligible when the CB loading is low (5 wt% CB).
- Why do plasticizers have a low viscosity?
- The low viscosity of plasticizer helps to increase the mobility of carriers and the lower melting temperature of plasticizers results in an increase in the amorphous content of plasticized polymer electrolytes, while the higher dielectric constant of plasticizer as compared to polymer (PEO) helps in the dissociation of ion aggregates.
- Does polyethylene glycol dimethyl ether (pegdme) plasticizer affect dielectric properties of PP/CB composites?
- In this work, the effect of polyethylene glycol dimethyl ether (PEGDME) plasticizer on the dielectric properties of poly (propylene)/carbon black (PP/CB) composites was investigated. PP/CB composites with varying content of CB from 0 to 15 wt% were melt-mixed.
- How can conductive polymer composites improve dielectric properties?
- The improvement of dielectric properties of conductive polymer composites is due to the polarization of conductive particles in the polymer matrix . Thus, a dielectric composite material can be manufactured by dispersing conductive filler in the insulating polymers , .
- What causes a dielectric constant near percolation?
- The critical behaviour of the dielectric constant near percolation is due to the existence of micro-capacitors. These micro-capacitors are formed by neighbouring conductive fillers/clusters (CB) separated by a very thin layer of insulator PP matrix.
