Abstract
In this paper, we consider methods for producing artificial latexes based on butadiene-styrene thermoplastic elastomer in the presence of cationic surfactants, as well as their mixtures with nonionic and silicone surfactants. The obtained results are compared for the particle size distribution, and conclusions are drawn about the stability of the polymer suspension. The size of particles of polymer suspensions was determined by the method of photon correlation spectroscopy (dynamic light scattering) using a laser particle analyzer. This method allows us to consider the properties of the resulting polymer suspensions and directly draw conclusions about the effect of nature and the concentration of surface active substances on the stability of the resulting latexes. It can be assumed that in this case, structural- mechanical and electrostatic barriers form in the surface layers of the particles. The combined action of these barriers has made it possible to obtain stable polymer emulsions. Thus, it can be concluded that the used surfactant mixtures make it possible to increase the stability of artificial latexes in the stages of emulsification and distillation.
Highlights
We consider methods for producing artificial latexes based on butadiene-styrene thermoplastic elastomer in the presence of cationic surfactants, as well as their mixtures with nonionic and silicone surfactants
The obtained results are compared for the particle size distribution, and conclusions are drawn about the stability of the polymer suspension
The size of particles of polymer suspensions was determined by the method of photon correlation spectroscopy using a laser particle analyzer
Summary
ВЛИЯНИЕ ПРИРОДЫ ЭМУЛЬГАТОРА НА ДИСПЕРСНОСТЬ И УСТОЙЧИВОСТЬ ИСКУССТВЕННЫХ ЛАТЕКСОВ. Рассмотрены способы получения искусственных латексов на основе бутадиен-стирольного термопластичного эластомера в присутствии катионных поверхностно-активных веществ, а также их смеси с неионными и кремнийорганическими поверхностно-активными веществами. Можно сделать вывод, что используемые смеси поверхностно-активных веществ позволяют повысить стабильность искусственных латексов на стадиях эмульгирования и отгонки. The size of particles of polymer suspensions was determined by the method of photon correlation spectroscopy (dynamic light scattering) using a laser particle analyzer. This method allows us to consider the properties of the resulting polymer suspensions and directly draw conclusions about the effect of nature and the concentration of surface active substances on the stability of the resulting latexes. Повысить устойчивость полимерных суспензий можно путем использования смеси ПАВ различной природы, в присутствии которых в межфазном адсорбционном слое частиц формируются два барьера стабилизации: структурно-механический и электростатический [1]. Цель данной работы состояла в получении устойчивых искусственных бутадиен-стирольных латексов с положительным зарядом частиц в присутствии смеси ПАВ различной природы
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