从氧化和二氧化碳中合成聚乙烯碳酸 - - 一种具有刚性骨干的聚碳酸
Donald J Darensbourg1, Stephanie J Wilson
1Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, USA. djdarens@mail.chem.tamu.edu
本研究提出了一种新方法,用于从二氧化碳和氧化中合成高性能聚碳酸盐. 由此产生的聚合物具有特殊的热稳定性和高的玻璃过渡温度,促进了可持续的聚合物开发.
科学领域:
- 聚合物化学 聚合物化学
- 有机金属催化工艺
- 可持续材料 可持续材料
背景情况:
- 二氧化碳的利用仍然是可持续化学的一个关键挑战.
- 环氧化物是用于聚合物合成的多功能单体.
- 开发高效的催化剂用于CO2 / 二氧化碳共聚合是至关重要的.
研究的目的:
- 开发一种用于高效共聚二氧化碳和氧化的催化系统.
- 描述由此产生的聚乙烯碳酸盐的结构和热性质.
- 为了达到高分子量和高玻璃化过渡温度的聚碳酸来自CO2.
主要方法:
- 使用 (盐) Co (III) -2,4-丁氧化物和洋盐的催化合反应.
- 选择性共聚合物形成的低温聚合条件 (0°C).
- 单体和循环碳酸盐产品的X射线结构分析.
- 聚合物的分子量测定 (GPC) 和热分析 (DSC,TGA).
主要成果:
- 成功合成了分子重量高达7100Da的聚乙烯碳酸盐.
- 达到高玻璃过渡温度 (Tg) 高达134°C,为CO2/环氧化碳聚碳酸报告的最高温度.
- 这种聚合物在高达249°C的温度下表现出极好的热稳定性.
- 控制的聚合,聚分散性指数 (PDI) 值≤1.3.3.
结论:
- 开发的催化系统使高性能聚碳酸从二氧化碳和氧化中有效合成.
- 与现有材料相比,获得的聚碳酸具有优越的热性能.
- 这项工作有助于推进二氧化碳的利用和开发可持续的聚合物.
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