Synthesis of Bio-based Epoxy Containing Phosphine Oxide as a Reactive Additive Toward Highly Toughened and Fire-retarded Epoxy Resins

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

13 Scopus Citations
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Author(s)

  • Chunxiang Wei
  • Tianyu Gao
  • Yu Xu
  • Guangjian Dai
  • Ruiting Li
  • SanE Zhu
  • Wei Yang
  • Hongdian Lu

Detail(s)

Original languageEnglish
Pages (from-to)1733–1746
Number of pages14
Journal / PublicationChinese Journal of Polymer Science (English Edition)
Volume41
Issue number11
Online published21 Feb 2023
Publication statusPublished - Nov 2023

Abstract

The integration of high mechanical toughness, impact strength as well as excellent flame-retardant properties toward epoxy resins (EPs) have always been a dilemma. The inadequate overall performance of EPs severely restricts their sustainable utilization in engineering aspects over long-term. Herein, a new bio-based agent (diglycidyl ether of magnolol phosphine oxide, referred as DGEMP) derived from magnolol (classified as lignan), extracted from natural plants Magnolia officinalis, was successfully synthesized and further employed as a flame-retardant reactive additive to diglycidyl ether of bisphenol A (DGEBA). As demonstration, the composite resin, DGEBA/15DGEMP (15 wt% DGEMP), achieved an Underwriters Laboratories-94 V-0 rating with a high limiting oxygen index (LOI) value (41.5%). In cone calorimeter tests, it showed that heat release and smoke production were effectively inhibited during combustion, wherein the peak heat release rate (PHRR) value of DGEBA/15DGEMP was reduced by 50% compared to neat DGEBA. Additionally, it exhibited a superior tensile strength (82.8 MPa), toughness (5.11 MJ/m3) and impact strength (36.5 kJ/m2), much higher than that of neat DGEBA (49.7 MPa, 2.05 MJ/m3 and 20.9 kJ/m2). Thus, it is highly anticipated that DGEMP imparts significantly improved mechanical and fire-retarded properties to conventional EPs, which holds a great potential to address the pressing challenges in EP thermosets industry. © 2023, Chinese Chemical Society and Institute of Chemistry, Chinese Academy of Sciences.

Research Area(s)

  • Epoxy resin, Flame retardant, Magnolol, Phosphine oxide, Toughness

Citation Format(s)

Synthesis of Bio-based Epoxy Containing Phosphine Oxide as a Reactive Additive Toward Highly Toughened and Fire-retarded Epoxy Resins. / Wei, Chunxiang; Gao, Tianyu; Xu, Yu et al.
In: Chinese Journal of Polymer Science (English Edition), Vol. 41, No. 11, 11.2023, p. 1733–1746.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review