Fabrication of Flame-retardant Epoxy Resins Based on Phenolic-hydroxyl Dynamic Networks and Synergistic Optimization of Its Properties

Jing-yan Cai; Jing-hong Liu; Xiu-li Wang

doi:10.11777/j.issn1000-3304.2025.25095

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Fabrication of Flame-retardant Epoxy Resins Based on Phenolic-hydroxyl Dynamic Networks and Synergistic Optimization of Its Properties

Research Article | 更新时间：2025-07-28

- Fabrication of Flame-retardant Epoxy Resins Based on Phenolic-hydroxyl Dynamic Networks and Synergistic Optimization of Its Properties
- Acta Polymerica Sinica Vol. 56, Issue 8, Pages: 1416-1425(2025)
- 作者机构：
  
  四川大学化学学院环保型高分子材料国家地方联合工程实验室环境友好高分子材料教育部工程研究中心成都 610064
- 作者简介：
  
  Xiu-li Wang, E-mail: xiuliwang1@163.com
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25095
  CLC：
- CSTR：32057.14.GFZXB.2025.7408
- Received：10 April 2025，
  
  Accepted：29 April 2025，
  
  Published Online：05 June 2025，
  
  Published：20 August 2025
- 稿件说明：
移动端阅览
蔡京燕, 刘璟宏, 汪秀丽. 基于酚羟基动态网络的阻燃环氧树脂构建及其性能协同优化. 高分子学报, 2025, 56(8), 1416-1425

Cai, J. Y.; Liu, J. H.; Wang, X. L. Fabrication of flame-retardant epoxy resins based on phenolic-hydroxyl dynamic networks and synergistic optimization of its properties. Acta Polymerica Sinica, 2025, 56(8), 1416-1425
蔡京燕, 刘璟宏, 汪秀丽. 基于酚羟基动态网络的阻燃环氧树脂构建及其性能协同优化. 高分子学报, 2025, 56(8), 1416-1425 DOI： 10.11777/j.issn1000-3304.2025.25095. CSTR： 32057.14.GFZXB.2025.7408.

Cai, J. Y.; Liu, J. H.; Wang, X. L. Fabrication of flame-retardant epoxy resins based on phenolic-hydroxyl dynamic networks and synergistic optimization of its properties. Acta Polymerica Sinica, 2025, 56(8), 1416-1425 DOI： 10.11777/j.issn1000-3304.2025.25095. CSTR： 32057.14.GFZXB.2025.7408.

摘要

阻燃环氧Vitrimer虽然在提升环氧树脂可再加工性方面取得良好进展，但通常以牺牲阻燃材料的热稳定性和机械性能为代价，严重限制了其在实际中的应用. 本研究通过引入具有刚性多苯环结构且含磷和酚羟基的10-(2

5-二羟基苯基)-10-氢-9-氧杂-10-磷杂菲-10-氧化物(ODOPB)作为阻燃共固化剂，成功制备了一种基于动态酯交换反应的可再加工本征阻燃环氧树脂(ODOPB/EV). ODOPB的引入显著提升了材料的综合性能：0.3ODOPB/EV的拉伸强度达到75.2 MPa，较未改性体系提高90%；初始分解温度提升至343 ℃，较未改性体系提高18 ℃；0.3ODOPB/EV通过UL-94 V-0等级，相较于未改性体系其峰值热释放速率和总热释放量分别降低47%和36%. 该环氧树脂在200 ℃下的弛豫时间仅为241 s，具有优异的动态性能.该环氧树脂在阻燃性、热稳定性、力学性能和可再加工性之间取得良好平衡.

Abstract

Although some progresses have been made for flame retardant epoxy vitrimer

its actual application is seriously limited at the cost of sacrificing the thermal stability and mechanical properties of flame retardant materials. In this study

10-‍(2

‍5-dihydroxyphenyl)‍-10-hydrogen-9-oxa-‍10-phosphaphenanthrene-10-oxide (ODOPB)

which has a rigid polyphenyl ring structure and simultaneously containing phosphorus and phenolic hydroxyl groups

was introduced as a flame retardant co-curing agent. A reprocessable intrinsic flame retardant epoxy resin based on dynamic transesterification reaction (ODOPB/EV) was successfully prepared. The introduction of ODOPB significantly improves the comprehensive properties of the material: the tensile strength of 0.3ODOPB/EV reaches 75.2 MPa

which is nearly 90% higher than that of the unmodified system; the initial decomposition temperature increases to 343 ℃

which is 18 ℃ higher than that of the unmodified system; compared with the unmodified system

the peak heat release rate and total heat release of 0.3ODOPB/EV are reduced by 47% and 36% respectively. The relaxation time of the epoxy resin at 200 ℃ is only 241 s

which has excellent dynamic properties. The epoxy resin has a good balance between flame retardancy

thermal stability

mechanical properties and reprocessability.

关键词

Keywords

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