使用通用介质器组合光控制的阴离子和阴离子组转移聚合物:允许访问双和三机制块共聚合物
Brandon M Hosford1, William Ramos1, Jessica R Lamb1
1Department of Chemistry, University of Minnesota-Twin Cities 207 Pleasant Street SE Minneapolis MN 55455 USA jrlamb@umn.edu.
Chemical science
|August 26, 2024
概括
研究人员开发了一种用于连续的阴离子-离子聚合物的通用介质,创造了新的块共聚合物. 这一突破使得复杂的聚合物结构可以通过多种机制从不同的单体类中合成.
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
- 有机合成 有机合成
背景情况:
- 从多个聚合机制和单体类中合成多种不同的块共聚合物仍然是聚合物化学中的一个重大挑战.
- 万能调解器对于创建复杂的聚合物架构而无需中间兼容性步骤至关重要.
- 虽然 thiocarbonyl thio (TCT) 组通过阴离子或阴离子聚合来调解激素聚合,但以前没有报告过一个顺序的阴离子-阴离子系统.
研究的目的:
- 开发一种新型的碳基 (TCT) 万能介质系统,能够进行顺序光控制的化聚合和酸基离子组转移聚合.
- 首次合成聚乙烯乙烯) 块-聚 () 块共聚合物.
- 通过激进聚合,通过结合第三种单体类型来证明该系统在制造复杂的高分子中的潜力.
主要方法:
- 使用TCT通用调解器,顺序启动乙烯基乙烯的光控制阴离子聚合.
- 其次是 thiirane 的 thioacyl 阴离子组转移聚合.
- 链延长了使用N-异烯胺基的基性聚合生成的双块共聚合物.
主要成果:
- 成功合成了聚乙烯乙烯) 块-聚 () 块共聚合物,代表了这种结构的第一例.
- 热分析证实了合成的块共聚合物的微相分离.
- 通过三种不同的聚合机制,从三个不同的单体类合成的三块制聚聚合物的第一个例子,没有终端组修改.
结论:
- 开发的TCT通用调解器系统可以轻松和顺序访问阴离子-阴离子块共聚合物.
- 这种方法克服了合成复杂聚合物架构的局限性,为材料设计提供了新的可能性.
- 该系统与激进聚合物的兼容性允许创建具有多种功能的先进的多块共聚合物.
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