通过有机催化方法从葡萄糖中提取的聚碳酸盐
Koichiro Mikami1, Alexander T Lonnecker, Tiffany P Gustafson
1Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States.
Journal of the American Chemical Society
|May 1, 2013
概括
研究人员开发了一种使用有机催化剂制造基于葡萄糖的聚碳酸盐的新方法. 这种可持续的方法产生了具有可调节性质的多功能聚合物,用于工程应用.
科学领域:
- 聚合物化学 聚合物化学
- 有机合成 有机合成
- 材料科学 材料科学 材料科学
背景情况:
- 聚碳酸是一种有价值的工程材料.
- 来自可再生资源的聚合物开发可持续的途径至关重要.
- 葡萄糖是一种易于获得的天然产品,作为一种生物基单体具有潜力.
研究的目的:
- 为葡萄糖衍生聚碳酸盐开发一种有机催化环开放聚合 (ROP) 方法.
- 从受保护的葡萄糖中合成和表征一个循环碳酸盐单体.
- 研究由此产生的聚碳酸盐的受控聚合和性质.
主要方法:
- 在三个步骤中制备受保护的循环葡萄糖碳酸盐单体.
- 使用NMR,IR,MS和单晶X射线分析进行结构确认.
- 机体催化ROP使用1,5,7-triazabicyclo[4.4.0]dec-5-ene和4-methylbenzyl酒精作为启动剂.
- 用NMR,GPC,MALDI-TOFMS,XRD和DSC对聚合物进行表征.
主要成果:
- 一种新型的循环4,6碳酸单体甲基保护葡萄糖的合成和特征.
- 控制的ROP产生了可调节分子量和狭窄分布的聚碳酸.
- 分析了聚合物骨干的区域化学 (头对头,头对尾,尾对尾).
- 聚合物表现出无形性质和相对较高的玻璃过渡温度.
结论:
- 为基于葡萄糖的聚碳酸盐建立了一种高效的有机催化ROP方法.
- 开发的聚合物来自可再生资源,提供可持续的替代品.
- 这些聚碳酸具有作为工程材料的潜在用途的理想性质.
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