聚乙烯的可见光启动的分散光聚合
Rémi Canterel1,2, Jacques Lalevée3,4, Elodie Bourgeat-Lami1
1Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43 Bd du 11 novembre 1918, F-69616, Villeurbanne, France.
Angewandte Chemie (International ed. in English)
|September 25, 2023
概括
可见光启动的聚合成功合成了聚乙烯 (PS) 颗粒. 优化的条件产生了更大,分布更窄的乳颗粒,可达1.2微米,这是光启动聚合的新进展.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 摄影化学的使用.
背景情况:
- 分散聚合提供了一种合成聚合物颗粒的途径.
- 可见光启动的聚合是一种传统方法的替代方案.
- 控制颗粒大小和分布对于材料应用至关重要.
研究的目的:
- 使用可见光启动的分散聚合物合成聚乙烯 (PS) 颗粒.
- 调查不同光启动系统 (PIS) 和稳定器对粒子特性的影响.
- 为了实现大,狭窄分布的乳颗粒的受控合成.
主要方法:
- 在可见光照射下,在乙醇/水混合物中分散聚合 styrene.
- 使用了基于基的N-异环碳酸光启动系统 (PIS) 和二硫化物化合物.
- 作为稳定剂,使用聚乙烯甘醇甲基乙甲酸盐 (PEGMA) 和聚乙烯 (PVP).
- 研究了基添加对聚合动力学和粒子特性的影响.
主要成果:
- 从100到350纳米的聚乙烯颗粒通过定量转换合成.
- 添加一个基提高了可重现性,导致更快的聚合,更窄的尺寸分布和更大的颗粒.
- 使用聚乙烯 (N-vinylpyrrolidone) 作为稳定剂导致显著更大的颗粒 (高达1.2μm) 具有狭窄的尺寸分布.
- 基于二硫化物的PIS也产生了更大,分布更窄的PS粒子.
结论:
- 可见光启动的分散聚合对于PS合成是有效的.
- 优化PIS和稳定剂,特别是聚乙烯 (N-乙烯利),使得前所未有的大型乳颗粒的生产成为可能.
- 这种方法为先进的聚合物乳材料的受控合成提供了一个有前途的途径.
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