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E. Makarewicz


Evaluation of the stability of poly(vinyl chloride) plastisols by using the energy of intermolecular interaction


Polimery 1993, No 11, 531


DOI: dx.doi.org/10.14314/polimery.1993.531

Summary

A method for the determination of the dispersion stability based on the micellar structure of particles in the poly(vinyl chloride) plastisol dispersion was proposed. The intermolecular energy of attraction and repulsion as well as the concentration of macromolecules in the zone of mutual penetration of the solvation layers, was calculated. lt was found that systems with dispersive medium formed by plasticizers which strongly solvate the polymer grains are the most stable. This was observed in the case of di-n-butylphthalate and di-(2-ethylhexyl)phthalate, whereas di-n-butyl sebacate did not meet stability requiremens. In such dispersive systems structural parameters of the particle, e.g. the ratio of the thickness of the solvation layer to the particle radius are the most favourable. Some drawbacks of the proposed theoretic assumptions were pointed out, however there is no other method of calculating intermolecular interactions in the zone of mutual penetration and the energy of the gel bonds network formation.


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