Rigid-flexible Synergy for Constructing High-strength, Tough, and Recyclable Poly(urea-urethane) Elastomers

Jian-ye Lu; Qing-chuang Lu; Zhen-yang Luo; Yan-long Luo

doi:10.11777/j.issn1000-3304.2025.25269

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Rigid-flexible Synergy for Constructing High-strength, Tough, and Recyclable Poly(urea-urethane) Elastomers

Research Article | 更新时间：2026-03-23

- Rigid-flexible Synergy for Constructing High-strength, Tough, and Recyclable Poly(urea-urethane) Elastomers
- Acta Polymerica Sinica Vol. 57, Issue 3, Pages: 709-720(2026)
- 作者机构：
  
  南京林业大学理学院南京 210037
- 作者简介：
  
  Yan-long Luo, E-mail: luoyanlong@njfu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25269
  CLC：
- CSTR：32057.14.GFZXB.2025.7524
- Received：17 October 2025，
  
  Accepted：01 December 2025，
  
  Online First：27 January 2026，
  
  Published：20 March 2026
- 稿件说明：
移动端阅览
陆健烨, 卢庆闯, 罗振扬, 罗艳龙. 刚柔协同构建高强韧可循环聚(脲-聚氨酯)弹性体. 高分子学报, 2026, 57(3), 709-720.

Lu, J. Y.; Lu, Q. C.; Luo, Z. Y.; Luo, Y. L. Rigid-flexible synergy for constructing high-strength, tough, and recyclable poly(urea-urethane) elastomers. Acta Polymerica Sinica (in Chinese), 2026, 57(3), 709-720.
陆健烨, 卢庆闯, 罗振扬, 罗艳龙. 刚柔协同构建高强韧可循环聚(脲-聚氨酯)弹性体. 高分子学报, 2026, 57(3), 709-720. DOI： 10.11777/j.issn1000-3304.2025.25269. CSTR： 32057.14.GFZXB.2025.7524.

Lu, J. Y.; Lu, Q. C.; Luo, Z. Y.; Luo, Y. L. Rigid-flexible synergy for constructing high-strength, tough, and recyclable poly(urea-urethane) elastomers. Acta Polymerica Sinica (in Chinese), 2026, 57(3), 709-720. DOI： 10.11777/j.issn1000-3304.2025.25269. CSTR： 32057.14.GFZXB.2025.7524.

摘要

针对高强韧聚氨酯(PU)难以循环利用的挑战，本工作通过在PU中引入超分子链段，构建刚柔协同的多级动态网络：刚性链段4

4′-二氨基苯甲酰胺(DABA)借助芳香环结构诱导形成强氢键体系以提供结构支撑、增强材料强度，柔性链段癸二酰肼(SPH)依托长链脂肪结构构建弱氢键体系，凭其链段迁移能力缓解应力集中并耗散能量，且二者引入的酰基氨基脲(ASCZ)基团赋予氢键网络动态可逆性. 所制备的PUU-DA-SPH

弹性体展现优异综合性能，拉伸强度达64.55 MPa、韧性为336.14 MJ·m

-3

，且经多次热压循环再加工后强度保留效率91%、韧性保留效率98%. 该研究为设计兼顾高强韧性与可循环利用的聚氨酯提供了新思路.

Abstract

To address the challenge of cyclic reprocessing of high-strength and tough polyurethane (PU)

this study introduces supramolecular segments into PU to construct a rigid-flexible synergistic multilevel dynamic network. The rigid segment 4

4′-diaminobenzamide (DABA) induces the formation of a strong hydrogen bond system

via

its aromatic ring structure to provide structural support and enhance material strength

whereas the flexible segment sebacoyl hydrazide (SPH) establishes a weak hydrogen bond system through its long-chain aliphatic structure

alleviating stress concentration and dissipating energy owing to its segment migration capability. Additional

the acylsemicarbazide (ASCZ) groups introduced by both segments endowed the hydrogen-bond network with dynamic reversibility. The prepared PUU-DA-SPH

elastomer exhibited excellent comprehensive properties

with a tensile strength of 64.55 MPa and toughness of 336.14 MJ·m

-3

. Moreover

it maintained a stable performance after multiple cycles of hot-press reprocessing (tensile strength retention rate of 91% and toughness retention rate of 98%). This study provides a novel approach for designing polyurethanes that integrate high strength

toughness

and cyclic reprocessability.

关键词

Keywords

references

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