Multi-Generational Frontal Curing and Chemical Recycling of Polydicyclopentadiene Thermosets.

IF 27.4 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Materials Pub Date : 2025-05-16 DOI:10.1002/adma.202505141

Xuyi Luo,Yong Min Kim,M J Lee,Edgar B Mejia,Yuran Shi,Nancy R Sottos,Jeffery W Baur,Yan Xia

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Abstract

Polydicyclopentadiene (pDCPD) is a high-performance thermoset with lightweight and exceptional thermomechanical properties. However, its traditional thermal curing process is energy-intensive and lacks chemical recyclability. Frontal Ring-Opening Metathesis Polymerization (FROMP) is an energy-efficient curing process and allows additive manufacturing of pDCPD. 2,3-Dihydrofuran (DHF) has been shown as an effective comonomer to allow the deconstruction of pDCPD thermosets when incorporated at a small fraction in pDCPD. Herein, a simple strategy for chemical recycling of pDCPD thermosets is reported, and maintaining FROMP characteristics and thermomechanical properties of the thermosets over five life cycles. Norbornadiene (NBD) is a key additive in resins containing recycled pDCPD to enhance polymerization kinetics and sustain FROMP characteristics. A one-pot strategy is also developed to deconstruct pDCPD thermosets and simultaneously functionalize the chain ends with norbornenes for reincorporating deconstructed oligomers back to the next generation thermoset. Using these strategies, five generations of recycling pDCPD thermosets with invariable thermomechanical properties are demonstrated. This work highlights a scalable and energy-efficient process to produce chemically recyclable pDCPD thermosets, significantly improving the circularity of this class of high-performance thermosets.

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聚双环戊二烯热固性材料的多代正面固化及化学回收。

聚双环戊二烯（pDCPD）是一种高性能热固性材料，具有轻质和特殊的热机械性能。但其传统的热固化工艺耗能大，缺乏化学可回收性。正面开环复分解聚合（FROMP）是一种节能的固化工艺，可用于pDCPD的增材制造。2,3-二氢呋喃（DHF）已被证明是一种有效的共聚单体，当在pDCPD中加入一小部分时，它可以分解pDCPD热固性聚合物。本文报道了一种简单的化学回收pDCPD热固性材料的策略，并在五个生命周期内保持热固性材料的FROMP特性和热机械性能。降冰片二烯（NBD）是含再生pDCPD树脂中提高聚合动力学和保持FROMP特性的关键添加剂。一锅策略也被开发来解构pDCPD热固性，并同时功能化链末端与降冰片烯重新整合解构的低聚物回到下一代热固性。利用这些策略，展示了具有恒定热力学性能的五代可回收pDCPD热固性材料。这项工作强调了一种可扩展和节能的工艺来生产化学可回收的pDCPD热固性材料，显著提高了这类高性能热固性材料的循环度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Materials 工程技术-材料科学：综合

CiteScore

43.00

自引率

4.10%

发文量

2182

审稿时长

2 months

期刊介绍： Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.