Amino-functionalization of Ethylene-Propylene Rubber and Its Dynamic Cross-linking

Zhen-hao Guo; Guang-yu Li; Chang Sun; Tian-xiao Chang; Shang-tao Chen; Teng Wang; Peng-fei Cao

doi:10.11777/j.issn1000-3304.2026.25313

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Amino-functionalization of Ethylene-Propylene Rubber and Its Dynamic Cross-linking

Research Article | 更新时间：2026-05-08

- Amino-functionalization of Ethylene-Propylene Rubber and Its Dynamic Cross-linking
- Acta Polymerica Sinica Vol. 57, Issue 5, Pages: 1120-1131(2026)
- 作者机构：
  
  1.北京化工大学材料科学与工程学院有机无机复合材料全国重点实验室北京 100029
  2.北京化工大学化学学院北京 100029
  3.中国石油天然气股份有限公司石油化工研究院北京 102206
- 作者简介：
  
  Shang-tao Chen, E-mail: chenst7890@petrochina.com.cn
  Teng Wang, E-mail: wangt@mail.buct.edu.cn
  Peng-fei Cao, E-mail: caopf@buct.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2026.25313
  CLC：
- CSTR：32057.14.GFZXB.2026.7550
- Received：03 December 2025，
  
  Accepted：05 January 2026，
  
  Online First：06 March 2026，
  
  Published：20 May 2026
- 稿件说明：
移动端阅览
国振豪, 李光裕, 孙畅, 常添笑, 陈商涛, 王腾, 曹鹏飞. 二元乙丙橡胶的胺基官能化及动态交联. 高分子学报, 2026, 57(5), 1120-1131.

Guo, Z. H.; Li. G. Y.; Sun. C.; Chang, T. X.; Chen, S. T.; Wang, T.; Cao, P. F. Amino-functionalization of ethylene-propylene rubber and its dynamic cross-linking. Acta Polymerica Sinica (in Chinese), 2026, 57(5), 1120-1131.
国振豪, 李光裕, 孙畅, 常添笑, 陈商涛, 王腾, 曹鹏飞. 二元乙丙橡胶的胺基官能化及动态交联. 高分子学报, 2026, 57(5), 1120-1131. DOI： 10.11777/j.issn1000-3304.2026.25313. CSTR： 32057.14.GFZXB.2026.7550.

Guo, Z. H.; Li. G. Y.; Sun. C.; Chang, T. X.; Chen, S. T.; Wang, T.; Cao, P. F. Amino-functionalization of ethylene-propylene rubber and its dynamic cross-linking. Acta Polymerica Sinica (in Chinese), 2026, 57(5), 1120-1131. DOI： 10.11777/j.issn1000-3304.2026.25313. CSTR： 32057.14.GFZXB.2026.7550.

摘要

二元乙丙橡胶(EPM)因其主链完全饱和，导致化学改性和交联方式有限，极大限制了其在高值化和绿色交联方面的应用. 本工作基于碳氢键活化和动态交联，设计了一种“先胺化—后交联”的策略，实现了商品化EPM的胺基官能化及绿色交联. 结果表明，小分子模型角鲨烷在氢原子转移催化剂

-羟基邻苯二甲酰亚胺(NHPI)的作用下，能够在温和条件下选择性活化三级碳氢键. 核磁共振与红外光谱等手段证实了胺基官能团在EPM上的成功引入，并构建了含腙键的动态交联网络(Hyd-EPM). 所得Hyd-EPM材料可通过简单的热压实现物理回收或在特定的酸性条件下实现化学降解. 本工作为商品化EPM的直接官能化与绿色交联提供了新的策略，在聚烯烃类弹性体的高价值利用、可持续发展方面具有重要的意义.

Abstract

Commercial ethylene-propylene rubber (EPM)

with a fully saturated hydrocarbon backbone

faces significant limitations in chemical modification and cross-linking methods

which restrict its high-value applications and environmentally friendly vulcanization. In this study

we designed an "amination and sub

sequent cross-linking" strategy based on C―H bond activation and dynamic covalent chemistry

achieving the direct amino-functionalization and dynamic cross-linking of commercial EPM. Experimental results demonstrated that the hydrogen atom transfer catalyst

-hydroxyphthalimide (NHPI) could selectively activate the tertiary C―H bonds of the small-molecule model compound squalane under mild conditions. Characterization techniques

including nuclear magnetic resonance (NMR) and Fourier-transform infrared (FTIR) spectroscopy

confirmed the successful introduction of amine functional groups onto the EPM backbone and the subsequent construction of a dynamic cross-linked network containing hydrazone bonds (Hyd-EPM). The resulting Hyd-EPM material exhibited excellent recyclability. They could be physically recycled through simple hot-pressing or chemically degraded under specific acidic conditions. This study provides a novel approach for the direct functionalization and sustainable cross-linking of commercial EPM

holding significant promise for the high-value utilization and sustainable development of polyolefin-based elastomers.

关键词

Keywords

references

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