诺帕丁:作为完全生物基热塑性弹性体的 styrene 替代品的松衍生循环二烯
Christoph Hahn1,2, Inigo Göttker-Schnetmann3, Ioannis Tzourtzouklis4
1Department of Chemistry, Johannes Gutenberg University, 55128 Mainz, Germany.
Journal of the American Chemical Society
|December 4, 2023
概括
来自β-平烯的可再生诺帕丁单体被聚合,产生了高性能聚合物和热塑性弹性体,具有更好的热性能和机械强度,用于先进的材料应用.
科学领域:
- 聚合物化学
- 可持续材料科学
- 有机合成
背景情况:
- 像β-平烯这样的类化合物为新型单体合成提供可再生原料.
- 开发可持续的石油基聚合物替代品对于减少环境影响至关重要.
- 诺帕丁的独特的双循环结构为新型聚合物特性提供了机会.
研究的目的:
- 合成和聚合双循环二烯单体诺帕迪因.
- 研究诺帕丁同聚合物和共聚合物的特性.
- 探索基于诺帕丁的材料作为聚合物应用中的可持续替代品的潜力.
主要方法:
- 通过Wittig-olefination或多步反应从可再生的 terpenoids (myrtenal, nopol) 中合成诺帕丁.
- 使用有机启动器进行活体阳离子聚合,用于控制的同聚合物合成.
- 用特定的过渡金属催化剂 (Ti,Lu) 来控制微结构的催化聚合.
- 通过诺帕迪因和米尔的离子聚合物合成的ABAtriblock共聚物.
主要成果:
- 诺帕丁聚合为具有可控摩尔质量 (5.6-103.4 kg·mol-1) 和低分散度 (1.06-1.18) 的同聚物.
- 催化聚合产生了具有选择性1,4和3,4微结构的聚合物.
- 诺帕丁聚合物表现出高的玻璃过渡温度 (Tg,∞ = 160 °C) 和良好的热稳定性.
- 通过纳米相分离和改善的使用温度 (比烯弹性体高30K) 来证明ABAtriblock共聚物具有热塑性弹性质.
结论:
- 诺帕丁是从可再生资源中提取的多功能单体,可用于合成高性能聚合物.
- 与传统材料相比,基于诺帕丁的聚合物和共聚物具有优越的热性能和机械性能.
- 这些发现突显了诺帕丁在开发可持续的高性能热塑性弹性体方面的潜力.
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