Observation of Polymerization‐Induced Phase Separation During Polymerization of Methyl Methacrylate in the Presence of Poly(Ethylene Glycol)

Author:

Onozato Shodai1,Kojima Chie12,Matsumoto Akikazu12ORCID,Suzuki Yasuhito12ORCID

Affiliation:

1. Department of Applied Chemistry Graduate School of Engineering Osaka Metropolitan University 1‐1 Gakuen‐cho, Naka‐ku Sakai Osaka 599‐8531 Japan

2. Department of Applied Chemistry Graduate School of Engineering Osaka Prefecture University 1‐1 Gakuen‐cho, Naka‐ku Sakai Osaka 599‐8531 Japan

Abstract

AbstractPolymerization‐induced phase separation takes place when a miscible component of the monomer becomes immiscible as the polymer is formed. One example is the polymerization of methyl methacrylate (MMA) in the presence of poly(ethylene glycol) (PEG). Depending on the initial conditions, microscopic structures, including porous structures, co‐continuous monolith structures, and particle aggregation structures, are obtained. In this study, the phase separation process is analyzed using an optical microscope and fluorescence microscope. The nucleation or spinodal decomposition in the initial stage, subsequent growth in the microscopic domains, and eventual fixation of the structure are observed. The observed images are analyzed using image analysis software. The particle number and the particle size as a function of reaction time are evaluated. Conversion and molecular weight distribution as a function of reaction time are also analyzed.

Funder

Japan Society for the Promotion of Science

Publisher

Wiley

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