Generation of latex particles and phase formation in a heterogeneous static monomer–water system

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Abstract

The aim of this work is to find new ways to synthesize latexes (polymer suspensions) with a given size and surface structure of particles. The need for such latexes is not large-scale, but their development and production are extremely important for the development of high technologies. Monodisperse latexes are especially valuable in immunological diagnostics of a wide range of diseases. The article presents the results of studies of the nucleation of latex particles in a heterogeneous monomer–water system. The results of these studies made it possible to find conditions for the reproducible synthesis of monodisperse polystyrene latexes. In order to change the surface structure of latex particles, cetyl alcohol was dissolved in the initial monomer phase (styrene). The article presents the results of electron microscopic studies of the synthesized latexes. Nano crystals of this alcohol are clearly visible on the surface of the latex particles. It is suggested that, in deep monomer conversions, the process of crystallization of cetyl alcohol begins in polymer-monomer particles.

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About the authors

А. А. Hovhannisyan

Научно-технологический центр органической и фармацевтической химии НАН РА

Author for correspondence.
Email: hovarnos@gmail.com
Armenia, 0014, Ереван, пр. Азатутян, 26

G. K. Grigoryan

Научно-технологический центр органической и фармацевтической химии НАН РА

Email: hovarnos@gmail.com
Armenia, 0014, Ереван, пр. Азатутян, 26

A. G. Nadaryan

Научно-технологический центр органической и фармацевтической химии НАН РА

Email: hovarnos@gmail.com
Armenia, 0014, Ереван, пр. Азатутян, 26

N. H. Grigoryan

Научно-технологический центр органической и фармацевтической химии НАН РА

Email: hovarnos@gmail.com
Armenia, 0014, Ереван, пр. Азатутян, 26

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Supplementary files

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2. Fig. 1. A picture of the change in turbidity of the aqueous phase at the initial stage of polymerization.

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3. Fig. 2. Photographs of test tubes in which polymerization was carried out in semi-static (test tube 1) and static (test tube 2) mode.

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4. Fig. 3. Electron microscopic photograph of polystyrene latex synthesized in semi-static monomer-water system.

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5. Fig. 4. Particle diameter distribution of latex synthesized in semi-static styrene-water potassium persulfate solution system.

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6. Fig. 5. Appearance of CS crystals in styrene block polymer when the temperature was lowered to 5°C.

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7. Fig. 6. Crystallization of CS in styrene when the solution temperature was lowered to 5°C. The concentration of CS in styrene is 6%.

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8. Fig. 7. Electron microscopic photographs of polystyrene latex synthesized in the presence of 6% CS in styrene.

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9. Fig. 8. Electron microscopic photograph of diluted polystyrene latex synthesized in the presence of 2% CS in styrene.

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