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聚氨热的功能上循环转化为增值热塑性塑料,通过小分子碳酸辅助断层连接挤出

Jared A Nettles^1,2, Saleh Alfarhan^1,2, Cameron A Pascoe²

¹Chemical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe 85287, Arizona, United States.

|August 30, 2024

概括

这项研究引入了一种新型的催化挤出工艺,用于将聚氨热升级为多功能热塑性塑料. 这种无溶剂的方法利用小分子碳酸盐来有效地解环和塑料废物的功能化.

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:

商品聚氨 (PU) 由于其交叉连接的耐热性结构,造成了回收挑战.
现有的PU回收方法是有限的,往往导致高粘度的热固态到热固态再加工.

研究的目的:

开发一种无溶剂,高吞吐率的方法,用于将PU热回收成可加工的热塑性塑料.
为了使各种应用程序具有所需的化学群体,使交叉连接的PU链具有功能.

主要方法:

一种使用小分子碳酸盐作为脱十字连接剂的催化脱十字连接挤出工艺.
双螺丝挤出,以促进催化碳酸盐交换反应,同时进行解构和功能化.
进行热,化学和结构分析,以确定最佳的脱穿链剂量和特征挤出材料.

主要成果:

成功地将芳香和性PU薄膜和泡转化为热塑性PU.
证明了与各种小分子碳酸盐的普遍性,包括具有甲基酸盐,炭酸盐和酸盐功能的碳酸盐.
在纯化的交叉连接挤出物中确认了链末功能.

结论:

开发的挤出工艺有效地将消费者后的PU热聚合物循环升级为具有受控分子量和功能的热塑性PU.
这种方法提供了一种强大的途径,可以创建用于粘合剂,光纤和刺激反应材料的功能性热塑性塑料.
该战略有可能在回收其他渐进增长的聚合物网络中得到更广泛的应用,有助于塑料废物管理.

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