Bulk Polymerization - Kaijoujuugou

Also known as bulk polymerization. This is a method of polymerizing only monomers by adding small amounts of initiators, without using a solvent. From an industrial perspective, this method has many advantages, such as not using solvents and being able to directly obtain molded products, but a major problem is controlling the polymerization temperature, including removing the heat of polymerization that is generated. Also, if unreacted monomers remain in the polymer, it is difficult to remove them. This method is used to make organic glass from methyl methacrylate, but other examples can also be seen in the polymerization of styrene and vinyl chloride.

Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition

バルク重合ともいう．溶媒を用いずに，単量体だけを少量の開始剤などを加えて重合させる方法．工業的には溶剤を使用しないこと，直接成形品が得られることなど利点も多いが，発生する重合熱の除去を含む重合温度制御が重要な問題点である．また，重合体中に未反応の単量体が残った場合には，これを取り除くことが難しい．メタクリル酸メチルから有機ガラスをつくる際に本法が用いられているが，そのほかスチレンや塩化ビニルの重合などにその例がみられる．

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