完全基于生物的triblock结构的双功能carbanionic合成,来自β-Farnesene和ll-Dilactide:热塑性弹性体
Moritz Meier-Merziger1, Jan Imschweiler1, Frank Hartmann2
1Johannes Gutenberg University, Mainz, Chemistry Department, Duesbergweg 10-14, 55128, Mainz, Germany.
Angewandte Chemie (International ed. in English)
|July 28, 2023
概括
研究人员从甘和玉米原料中开发了一种全新的,完全生物基的热塑性弹性体 (TPE). 这种可持续材料表现出有前途的弹性特性和独特的相隔形态,适用于先进的应用.
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
- 可持续材料 可持续材料
背景情况:
- 越来越多的环境问题和不断减少的化石燃料需要在聚合物开发中找到可持续的替代品.
- 热塑性弹性体 (TPE) 具有多功能性质,但通常依赖于石化原料.
- 有一个重要的需要生物基TPE与可调整的机械和形态特征.
研究的目的:
- 通过使用可再生资源合成完全基于生物的热塑性弹性体 (TPE).
- 创建具有受控架构的 ABA 类型块共聚合物.
- 描述材料的形态,热性能和机械性能.
主要方法:
- 使用双功能启动剂和甲基三乙烯 (MTBE) 溶剂的阳离子聚合.
- 从β-farnesene中合成电切力多法纳宏发起剂.
- 随后的乳化物聚合形成H形triblock共聚合物.
- 使用传输电子显微镜 (TEM),小角度X射线散射 (SAXS) 和拉伸试验进行表征.
主要成果:
- 从生物基单体 (β-法纳和L-乳化物) 中成功合成H形triblock共聚物.
- 实现了低分散度 (Đ=1.071.10) 和明确的宏观倡议者.
- 通过TEM和SAXS观察到不同的相隔形态 (轮状或圆柱形).
- 经过 -66°C和51°C的两种玻璃过渡温度 (Tg) 的证明,具有弹性机械性能.
结论:
- 开发的生物基材料显示出作为热塑性弹性体 (TPE) 的巨大潜力.
- 控制合成允许调节性质和独特的形态学.
- 这项工作有助于开发由可再生资源获得的可持续聚合物.
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