一个简单和简单的方法,以阿利法 N 替代功能性八分子循环碳酸盐及其有机催化聚合物
Shrinivas Venkataraman1, Victor W L Ng1, Daniel J Coady2
1Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos, Singapore 138669, Singapore.
Journal of the American Chemical Society
|October 13, 2015
概括
合成了新的功能性八分子循环碳酸盐,并探索了它们的有机催化环开放聚合 (ROP). 催化剂增强了聚合率,产生了具有调节性质的明确聚合物.
科学领域:
- 聚合物化学
- 有机合成
- 材料科学
背景情况:
- 八个组成的循环碳酸盐为聚合物合成提供了独特的单体结构.
- 有机催化为控制的聚合提供了无金属的途径.
- 替代N的二甲醇胺是循环碳酸盐合成的可访问的前体.
研究的目的:
- 合成新的异形N替代的功能性八分子循环碳酸盐.
- 研究这些单体的有机催化环开放聚合 (ROP).
- 探索N替代剂和催化剂对聚合动力学和聚合物特性的影响.
主要方法:
- 替代N的二甲醇胺的内分子循环形成循环碳酸盐.
- 使用 triazabicyclodecene (TBD) 和 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) 的有机催化 ROP.
- 动力学研究,计算分析和由此产生的聚合物 (分子量,分散性,热性质) 的表征.
主要成果:
- 成功合成了N-烯,N-基和N-碳酸盐替代的循环碳酸盐.
- 与DBU相比,TBD对N-基单体具有更高的催化活性,提高了聚合率.
- 在2小时内获得低分散度 (Đ(M) ≤1.3的明确聚合物,转化率≥80%.
- 聚合物特性,包括玻璃过渡温度 (T) 和降解温度 (T) 是基于N替代物的调节.
结论:
- 用N替代的八个成员循环碳酸盐的有机催化RP是一种有效的生产功能聚合物的方法.
- 催化剂 (TBD与DBU) 和N替代剂的选择显著影响聚合动力学和聚合物特性.
- 这种方法为具有可调节的热特性和共聚化潜力的功能性聚碳酸提供了多功能和有吸引力的途径.
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