V.V. Guzeyev

Thermoelastic properties of plasticized polyvinylchloride

Abstract A thermodynamic study was made of the elongation of polyvinylchloride over the concentration range of a didecylphthalate plasticizer of 0 to 70%. It was shown that the reduction of entropy and enthalpy in elongation depends markedly on the concentration of the plasticizer having maximum values in the region of 7–30% and minimum in the region of 60–70%. Results are interpreted on the basis of structural concepts concerning plasticized PVC and calculations of physical network parameters intermolecular bonds.

The effect of filler dispersity of the melt viscosity of polyvinyl chloride (PVC)

Abstract The effects of the particle dimensions of fillers on the melt viscosity of PVC was investigated. A particular size was found to produce an anomalous reduction of the PVC melt viscosity at low filler concentrations. These results are explained on the basis of the structural model of amorphous polymers.

Variation of the volume of filled plasticized polyvinylchloride in deformation

Abstract A study was made of the behaviour in elongation of plasticized polyvinylchloride with various fillers. It was shown that in elongation starting from a certain stress, the specific volume of filled samples increases which is due to the formation of vacuoles caused by separation of the polymer from filler particles. The stress at which separation occurs depends on the activity of the filler surface in relation to polyvinylchloride.

Effect of the morphology of polyvinyl chloride on the impact strength of materials based on it

Abstract The relation between the initial morphology of a polymer, as indicated by the dimensions and degree of aggregation of the structural units, the retention of these units after processing, and the impact strength of the composite is studied. A direct relation between the impact strength of the processed specimens and the specific surface of the original PVC is demonstrated. The existence of this relation is associated with the effect of the morphology of the original PVC on the structure of the material undergoing processing.

Thermodynamics of high-elastic deformation of filled polyvinylchloride☆

Abstract A study was made of the effect of a number of fillers of different types and surface on thermodynamics of high-elastic deformation of PVC. In their effect on thermodynamic stress components the fillers studied form two groups: 1-polar active filler influencing both energy and entropy stress components; 2-nonpolar filler which cause basically conformation changes in the polymer. In small amounts with slight deformation fillers of group 1 contribute to structure formation of PVC, with high concentrations the filler “inhibits” structure formation. Fillers of group 2 do not influence process of structure formation during deformation of PVC.