Ring-Opening Polymerization of Triaziridine Compounds in Water: An Extremely Facile Method to Synthesize a Porous Polymer through Polymerization-Induced Phase Separation,ACS Macro Letters

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Ring-Opening Polymerization of Triaziridine Compounds in Water: An Extremely Facile Method to Synthesize a Porous Polymer through Polymerization-Induced Phase Separation
ACS Macro Letters ( IF 5.1 ) Pub Date : 2022-04-12 , DOI: 10.1021/acsmacrolett.2c00110
Naofumi Naga _{1,

2} , Tomoya Takenouchi ₂ , Tamaki Nakano _{3,

4}

Affiliation

Dissolution of trifunctional aziridine compounds, 2,2-bishydroxymethylbutanol-tris[3-(1-aziridinyl)propionate] (3AZ) and tetramethylolmethane-tri-β-aziridinylpropionate (3AZOH), in water initiates a ring-opening polymerization and successful yields the corresponding network polymers via cationic polymerization. The polymerization of 3AZ induced phase separation and produced porous polymers under a wide range of monomer concentrations and polymerization temperatures. The phase separation rate in the 3AZ/water system was estimated by quantifying the turbidity by means of light transmission where transmittance decreased with an increase in the content of phase-separated materials. The rate increased with an increase in reaction temperature. The 3AZ porous polymers showed characteristic surface morphologies, which were formed by connected particles with diameters of about 4–5 μm. The porous polymers were not breakable by the compression test under 50 N. The Young’s modulus of the 3AZ porous polymers increased with an increase in polymerization temperature, which may be accounted for by cross-linking through the formation of quaternary ammonium salt formed by a termination reaction. The 3AZ porous polymer absorbed various solvents.

中文翻译：

三氮丙啶化合物在水中的开环聚合：一种通过聚合诱导相分离合成多孔聚合物的极其简便的方法

三官能氮丙啶化合物 2,2-二羟甲基丁醇-三[3-(1-氮丙啶基)丙酸酯] (3AZ) 和四羟甲基甲烷-三-β-氮丙啶基丙酸酯 (3AZOH) 在水中的溶解引发开环聚合并成功产生通过阳离子聚合得到相应的网络聚合物。在很宽的单体浓度和聚合温度范围内，3AZ 的聚合诱导相分离并产生多孔聚合物。3AZ/水系统中的相分离速率是通过通过光透射量化浊度来估计的，其中透射率随着相分离材料含量的增加而降低。该速率随着反应温度的升高而增加。3AZ 多孔聚合物显示出特征性的表面形态，它们由直径约 4-5 μm 的连接颗粒形成。多孔聚合物在 50 N 下的压缩试验中不可断裂。3AZ 多孔聚合物的杨氏模量随着聚合温度的升高而增加，这可能是由于通过形成由末端形成的季铵盐进行的交联反应。3AZ 多孔聚合物吸收各种溶剂。

更新日期：2022-04-12

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