选择性低温去聚合高转化P ((LLA-co-CL) 共聚物:高效的乳酸恢复和PCL上循环
Sébastien Moins1, Olivier Coulembier1
1Laboratory of Polymeric and Composite Materials, University of Mons, Mons, Belgium.
Macromolecular rapid communications
|November 21, 2025
概括
现在可以使用化学回收聚L-乳酸-co-caprolactone (PLA-co-CL). 这种方法可选择性地回收高质量的L-乳酸盐,并创建新型的聚烯酸结构.
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
- 可持续化学 可持续化学
背景情况:
- 聚合物的化学回收对于聚合物循环性至关重要,但也带来了重大挑战.
- 聚L-乳酸-co-caprolactone (P(LLA-co-CL)) 是一种常见的共聚,具有复杂的回收要求.
研究的目的:
- 开发一种选择性和高效的化学回收方法,用于P(LLA-co-CL) 共聚合物.
- 在特定条件下调查脱聚合行为和产品形成.
主要方法:
- 在130°C使用SnOct2/BnOH催化剂制备统计性P(LLA-co-CL) 共聚物.
- 在230°C的真空蒸共聚合物以选择性回收L-乳化物 (LLA).
- 在250°C进行进一步的热处理,以去除剩余的聚合物残留物.
主要成果:
- 实现了P ((LLA-co-CL) 的高度选择性去聚合,产生96-99mol%的LLA.
- 回收的聚合物残留物被重组成具有独特架构的高摩尔质量聚烯 (PCL).
- 没有检测到任何不必要的宏循环副产品,这表明清洁的脱聚合过程.
结论:
- 一种新的低温化学回收工艺使选择性LLA回收和PCL上循环成为可能.
- 该方法为复杂共聚合物的闭环和增值回收提供了实际框架.
- 生成的上循环PCL为材料属性设计和应用提供了新的途径.
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