含磷低分子量聚苯醚的制备及在环氧树脂阻燃中的应用

doi:10.11896/cldb.25040078

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Abstract A series of novel phosphorus-containing polyphenylene oxides (MPPOs) were synthesized through a controlled co-polymerization strategy using phenylphosphonic dichloride and low-molecular-weight polyphenylene oxide with varying feed ratios. These MPPOs were subsequently employed to modify epoxy resin (EP) via a solution-blending method. The effects of phosphorus content in MPPOs on the comprehensive properties of EP composites were systematically investigated, with particular emphasis on their flame-retardant mechanisms. Experimental results de-monstrated that the EP/MPPO4 composite containing 15wt% MPPO4 exhibited remarkable performance enhancements: ⅰ) The dielectric constant decreased from 2.77 (neat EP) to 1.48 at 2 MHz; ⅱ) The residual char yield at 800 ℃ significantly increased to 21.8%; ⅲ) A UL-94 V-0 rating with a limiting oxygen index of 31.3%. Notably, the incorporation of MPPO4 reduced the peak heat release rate and smoke production rate, respectively, thereby substantially improving fire safety without compromising mechanical integrity. Mechanistic studies revealed that EP/MPPO4 exhibited a synergistic gas-phase and condensed-phase flame-retardant mechanism, which effectively suppressed toxic smoke emission and promoted the formation of a thermally stable char layer. This work provides a viable strategy for developing high-performance epoxy compo-sites with balanced dielectric, flame-retardant, and mechanical properties.

Key words： phosphorus-containing low-molecular-weight polyphenylene oxide dielectric property thermal degradation performance flame retardancy mechanical property

Published: 25 April 2026 Online: 2026-05-06

CLC number:

TQ32

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	Articles by authors
	ZHANG Jiafu
	SHAN Xueying
	HUANG Qixin
	DIAO Yuxuan
	LI Jinchun

Cite this article:

ZHANG Jiafu,SHAN Xueying,HUANG Qixin, et al. Synthesis of Phosphorus-containing Low-molecular-weight Polyphenylene Ether and Flame-retardant Application in Epoxy Resins[J]. Materials Reports, 2026, 40(8): 25040078-7.

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https://www.mater-rep.com/EN/10.11896/cldb.25040078 OR https://www.mater-rep.com/EN/Y2026/V40/I8/25040078

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