Synthesis and Characterization of High-strength and High-toughness Polyurethane Elastomers Based on Stereoisomeric Hydrogen Bonds

Juan Tian; Jia-lin Li; Hong-wei Song; Yuan-chi Ma; Zhi-bo Li

doi:10.11777/j.issn1000-3304.2025.25084

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Synthesis and Characterization of High-strength and High-toughness Polyurethane Elastomers Based on Stereoisomeric Hydrogen Bonds

Research Article | 更新时间：2025-08-28

- Synthesis and Characterization of High-strength and High-toughness Polyurethane Elastomers Based on Stereoisomeric Hydrogen Bonds
- Acta Polymerica Sinica Vol. 56, Issue 9, Pages: 1557-1572(2025)
- 作者机构：
  
  1.青岛科技大学化工学院青岛 266042
  2.山东省高等学校生物基高分子材料重点实验室青岛科技大学高分子科学与工程学院青岛 266042
- 作者简介：
  
  Yuan-chi Ma, E-mail: yuanchi.ma@qust.edu.cn
  Zhi-bo Li, E-mail: zbli@qust.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25084
  CLC：
- CSTR：32057.14.GFZXB.2025.7410
- Received：30 March 2025，
  
  Accepted：06 May 2025，
  
  Published Online：23 June 2025，
  
  Published：20 September 2025
- 稿件说明：
移动端阅览
田娟, 李佳林, 宋红玮, 马远驰, 李志波. 基于立体异构氢键的高强高韧聚氨酯弹性体合成及性质研究. 高分子学报, 2025, 56(9), 1557-1572

Tian, J.; Li, J. L.; Song, H. W.; Ma, Y. C; Li, Z. B. Synthesis and characterization of high-strength and high-toughness polyurethane elastomers based on stereoisomeric hydrogen bonds. Acta Polymerica Sinica, 2025, 56(9), 1557-1572
田娟, 李佳林, 宋红玮, 马远驰, 李志波. 基于立体异构氢键的高强高韧聚氨酯弹性体合成及性质研究. 高分子学报, 2025, 56(9), 1557-1572 DOI： 10.11777/j.issn1000-3304.2025.25084. CSTR： 32057.14.GFZXB.2025.7410.

Tian, J.; Li, J. L.; Song, H. W.; Ma, Y. C; Li, Z. B. Synthesis and characterization of high-strength and high-toughness polyurethane elastomers based on stereoisomeric hydrogen bonds. Acta Polymerica Sinica, 2025, 56(9), 1557-1572 DOI： 10.11777/j.issn1000-3304.2025.25084. CSTR： 32057.14.GFZXB.2025.7410.

摘要

本研究以聚己内酯(PCL)为软段，通过引入手性二醇异山梨醇(IS)与异甘露醇(IM)构建了两种立体构型的热塑性聚氨酯弹性体(TPU-IM/TPU-IS)，揭示了扩链剂分子构象对材料性能的影响. 研究发现，TPU-IM体系凭借其刚性三维构象形成更高密度的氢键交联网络，且氢键含量随硬段比例增加，呈线性增长.在力学性能方面，TPU-IM-30表现出71.0 MPa的拉伸强度和1312%断裂伸长率的高综合性能，其杨氏模量(45.3 MPa)相较对应的TPU-IS-30提升125%，且相较于TPU-IM-20而言，硬段含量增加未显著牺牲断裂伸长率. 循环拉伸测试表明，TPU-IM-30在低应变下表现出比TPU-IS-30更高的回弹性与优异的能量耗散能力.同时，TPU-IM和TPU-IS弹性体具有抗撕裂、应力松弛抗性、热稳定性和可再加工性. 本研究揭示了异甘露醇的立体构型在构建动态氢键网络中的独特优势，为设计兼具高强度、高韧性以及能量耗散的智能响应材料提供了新思路.

Abstract

In this study

polycaprolactone (PCL) was used as the soft segment

and two kinds of thermoplastic polyurethane elastomers (TPU-IM and TPU-IS) with different stereoconfigurations were constructed by introducing chiral diols isosorbide (IS) and isomannide (IM)

revealing the influence of the molecular conformation of the chain extender on the properties of the materials. The study found that the TPU-IM system forms a higher density of hydrogen bond cross-linking network due to its rigid three-dimensional conformation

and the hydrogen bond content increases linearly with the increase of the hard segment ratio. In terms of mechanical properties

TPU-IM-30 exhibits high comprehensive properties with a tensile strength of 71.0 MPa and an elongation at break of 1312%. Its Young's modulus (45.3 MPa) is 125% higher than that of the corresponding TPU-IS-30. Moreover

compared with TPU-IM-20

the increase in the hard segment content does not significantly sacrifice the elongation at break. The cyclic tensile test shows that TPU-IM-30 exhibits higher resilience and excellent energy dissipation ability than TPU-IS-30 under low strain. Meanwhile

both TPU-IM and TPU-IS elastomers possess tear resistance

stress relaxation resistance

thermal stability

and reprocessability. This study reveals the unique advantages of the stereoconfiguration of isomannide in constructing a dynamic hydrogen bond network

providing new ideas for the design of intelligent responsive materials with high strength

high toughness

and energy dissipation capabilities.

关键词

Keywords

references

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