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寻找具有高T_g的刚性,坚固的聚合物 - - 具有高异化物含量的可再生芳香聚合物

Bruno Bottega Pergher¹, Daniel H Weinland¹, Robert-Jan van Putten²

¹Industrial Sustainable Chemistry, van't Hoff Institute of Molecular Sciences, University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands G.J.M.Gruter@uva.nl.

RSC sustainability

|August 30, 2024

概括

这项研究开发了高性能可再生聚合物,平衡了刚性和冲击强度. 这些生物基材料为ABS和聚碳酸等传统塑料提供了可持续的替代品.

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
可持续的高分子.

背景情况:

具有平衡冲击强度,弹性模量和高玻璃过渡温度 (Tg) 的高性能可再生聚合物很少.
实现这些特性可以使高性能聚合物 (如ABS,聚碳酸) 以可回收,生物基替代品取代.
结合像异化物这样的刚性单体是具有挑战性的,因为它们的反应性很低,阻碍了高分子量聚合成.

研究的目的:

从可再生单体中合成芳香聚,具有增强的机械性能和高玻璃过渡温度 (Tg).
调查不同co-diols对基于异酸盐的聚合物的刚性和冲击强度之间的平衡的影响.
使用反应性溶剂方法,以高效地纳入高含量异化物.

主要方法:

使用生物基异索化物和各种柔性共二醇 (1,4-butanediol,1,4-cyclohexanedimethanol,1,3-propanediol) 的芳香聚的合成.
使用了先前开发的合成方法,采用反应性溶剂,以结合高含量异酸盐的合成方法.
描述聚的特性,包括玻璃过渡温度 (Tg),拉伸模量和冲击强度.

主要成果:

含有异化物的聚合物表现出高的玻璃过渡温度 (Tg > 90 °C) 和高拉伸模量 (> 1850 MPa).
含有2,5-furandicarboxylic acid (FDCA) 和乙烯糖醇的化合物显示出高刚性但低冲击强度 (<5kJ m-2).
甲基乙酸,异化物和柔性二醇 (1,4-butanediol,CHDM,1,3-propanediol) 的组合实现了高拉伸模量 (> 1850 MPa) 和高冲击强度 (> 10 kJ m-2) 的优越平衡.

结论:

可再生芳香聚烯可以进行工程设计,以实现机械性能的理想平衡,包括高刚性和抗冲击性.
灵活的共二醇对于增强含有异索化物的聚合物的冲击强度至关重要.
这些发现为可持续的高性能聚钢铺平了道路,作为传统工程塑料的可行替代品.

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