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N.N. Voroncova, S. I. Omelcenko


The effect of vibrations on the properties of solutions of ollgoestermaleates and polymers on their basis


Polimery 1990, No 1-2, 21



DOI: dx.doi.org/10.14314/polimery.1990.021


Summary

The effect of interaction of the vibrational fields of low frequency (below 80 Hz) on the viscosity, density and microstructure of styrene solutions of oligoestermaleates (prepared from maleic anhydride and dioxypropylene derivative of bisphenol A) as well as on the average molecular weight, m, adn acid number of these oligomers has been investigated. The characteristic resonance frequencies of the initial solutions have been determined — they are 15.5 Hz and 50.0 Hz. It has been found that as an effect of vibrations the structural modification of solutions takes place — this modification depends on the concentration of solutions, their temperature, and m of oligomers. Vibration under defined conditions accelerates the crosslinking process of oligomers by their reaction with styrene, changes the crosslinking yield, increases the tensile strength and elongation at break of copolymers and decreases their equilibrium degree of swelling in water.


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