Solvent-free Preparation, Properties and Applications of Reprocessable Poly(urea-urethane) Elastomers based on Hindered Urea Bonds

Jia-ni Wu; Yue-peng Wang; Bo Qian; Ze-kai Wu; Ji-lin Su; Yi-han Wang; Chuang Li; Zheng-wei You

doi:10.11777/j.issn1000-3304.2025.25012

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Solvent-free Preparation, Properties and Applications of Reprocessable Poly(urea-urethane) Elastomers based on Hindered Urea Bonds

Research Article | 更新时间：2025-08-28

- Solvent-free Preparation, Properties and Applications of Reprocessable Poly(urea-urethane) Elastomers based on Hindered Urea Bonds
- Acta Polymerica Sinica Vol. 56, Issue 9, Pages: 1546-1556(2025)
- 作者机构：
  
  1.东华大学材料科学与工程学院先进纤维材料全国重点实验室上海 201620
  2.江苏万盛大伟化学有限公司泰兴 225442
- 作者简介：
  
  Chuang Li, E-mail: mars@ws-chem.com
  Zheng-wei You, E-mail: zyou@dhu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25012
  CLC：
- CSTR：32057.14.GFZXB.2025.7361
- Received：08 January 2025，
  
  Accepted：17 February 2025，
  
  Published Online：28 April 2025，
  
  Published：20 September 2025
- 稿件说明：
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吴佳妮, 王岳鹏, 钱博, 吴泽凯, 苏基林, 王艺涵, 李闯, 游正伟. 基于受阻脲键的可重加工聚(脲-氨酯)弹性体的无溶剂制备、性能及应用研究. 高分子学报, 2025, 56(9), 1546-1556

Wu, J. N.; Wang, Y. P.; Qian, B.; Wu, Z. K.; Su, J. L.; Wang, Y. H.; Li, C.; You, Z. W. Solvent-free preparation, properties and applications of reprocessable poly(urea-urethane) elastomers based on hindered urea bonds. Acta Polymerica Sinica, 2025, 56(9), 1546-1556
吴佳妮, 王岳鹏, 钱博, 吴泽凯, 苏基林, 王艺涵, 李闯, 游正伟. 基于受阻脲键的可重加工聚(脲-氨酯)弹性体的无溶剂制备、性能及应用研究. 高分子学报, 2025, 56(9), 1546-1556 DOI： 10.11777/j.issn1000-3304.2025.25012. CSTR： 32057.14.GFZXB.2025.7361.

Wu, J. N.; Wang, Y. P.; Qian, B.; Wu, Z. K.; Su, J. L.; Wang, Y. H.; Li, C.; You, Z. W. Solvent-free preparation, properties and applications of reprocessable poly(urea-urethane) elastomers based on hindered urea bonds. Acta Polymerica Sinica, 2025, 56(9), 1546-1556 DOI： 10.11777/j.issn1000-3304.2025.25012. CSTR： 32057.14.GFZXB.2025.7361.

摘要

近年来，通过引入动态共价键实现可重塑加工的热固性聚氨酯材料得到了广泛关注. 然而大多数动态聚氨酯都采用溶液聚合法. 溶剂的使用使工艺变得复杂，并增加了成本. 本研究选用已工业化生产的、含大位阻作用的仲胺型扩链剂、异佛尔酮二异氰酸酯(IPDI)、聚四氢呋喃二元醇(PTMG)和交联剂甘油以无溶剂本体聚合法，制备得到了一种含受阻脲键的动态聚脲弹性体. 原料廉价易得、生产过程绿色环保，具有良好的工业化生产前景. 利用红外光谱、紫外光谱、动态热机械分析、热重分析、流变测试表征了弹性体的结构和性质. 研究结果表明含受阻脲键的聚脲弹性体具备良好的机械性能(拉伸强度：13.0~24.5 MPa)、优异的回弹性与可重复加工性能. 我们进一步探究了所制备的聚脲弹性体的潜在应用，利用其制备了单电极摩擦纳米发电机(TENG)，展示了其在电学上应用的潜力.

Abstract

In recent years

thermoset polyurethane materials that can be remolded by introducing dynamic covalent bonds have received much attention. However

most dynamic polyurethanes are solution polymerized. The use of solvents complicates the process and increases the cost. In this study

a dynamic polyurea elastomer containing hindered urea bonds was prepared by solvent-free polymerization of an industrially produced secondary amine-type chain extender with isophorone diisocyanate (IPDI) and polytetrahydrofuran diol (PTMG). The raw materials are cheap and easy to obtain

and the preparation process is green and environmentally friendly

which has a good prospect for industrialized production. The structure and properties of the elastomer were characterized by infrared spectroscopy

ultraviolet spectroscopy

dynamic thermo-mechanical analysis

thermogravimetric analysis and rheological test. The results show that the polyurea elastomers containing hindered urea bonds have good mechanical properties (tensile strength: 13.0-24.5 MPa)

excellent resilience and reprocessability. In addition

we further explored the potential applications of the prepared polyurea elastomers by utilizing them to prepare a triboelectric nanogenerator (TENG)

demonstrating its potential for electrical applications.

关键词

Keywords

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东华大学先进纤维材料全国重点实验室材料科学与工程学院

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