Transformation of aqueous methyl methacrylate solution into stable monodisperse latex via polymerization initiated by hydroquinone–potassium persulfate system

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The aim of this work was to identify the possibilities of synthesizing stable latex with a narrow particle distribution by homogeneous polymerization in an aqueous solution of methyl methacrylate. The polymerization of methyl methacrylate was first carried out under static conditions in an aqueous solution of the hydroquinone–potassium persulfate oxidation-reduction system. It was assumed that semiquinone anion radicals formed at the intermediate stage of hydroquinone oxidation can participate in the reactions of termination of growing radicals and by changing the molecular parameters of polymer molecules, affect the process of formation of latex particles. The article presents the results of the study of the colloidal parameters of the obtained latex, which show that the selected polymerization conditions allow reproducibly synthesizing monodisperse stable latex.

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作者简介

A. Hovhannisyan

Scientific-Technological Center of Organic and Pharmaceutical Chemistry of the National Academy of Sciences of the Republic of Armenia

编辑信件的主要联系方式.
Email: hovarnos@gmail.com
亚美尼亚, 26, Azatutyunyan Ave., Yerevan, 0014

G. Grigoryan

Scientific-Technological Center of Organic and Pharmaceutical Chemistry of the National Academy of Sciences of the Republic of Armenia

Email: hovarnos@gmail.com
亚美尼亚, 26, Azatutyunyan Ave., Yerevan, 0014

A. Nadaryan

Scientific-Technological Center of Organic and Pharmaceutical Chemistry of the National Academy of Sciences of the Republic of Armenia

Email: hovarnos@gmail.com
亚美尼亚, 26, Azatutyunyan Ave., Yerevan, 0014

N. Grigoryan

Scientific-Technological Center of Organic and Pharmaceutical Chemistry of the National Academy of Sciences of the Republic of Armenia

Email: hovarnos@gmail.com
亚美尼亚, 26, Azatutyunyan Ave., Yerevan, 0014

参考

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2. Fig. 1

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3. Fig. 1. Dynamics of turbidity change of MMA aqueous solution during polymerisation initiation by hydroquinone-PC redox system at temperatures of 40 and 25°C (tubes 1 and 2, respectively).

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4. Fig. 2. Photograph of the aqueous MMA solution after 24 h of polymerisation. The temperature in tubes 1 and 2 is 25°C, in tube 3 - 40°C.

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5. Fig. 3. Photograph of the aqueous MMA solution after 24 h of polymerisation at 60°C.

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6. Fig. 4. Hydrodynamic diameter distribution pattern of latex particles synthesised in the presence of hydroquinone at different initial temperatures.

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7. Fig. 5. Electron micrograph of latex obtained by homogeneous polymerisation of MMA in an aqueous solution of the hydroquinone-PC redox system.

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