呋喃衍生膦阻燃剂具有综合机械性能、热稳定性和阻燃性的呋喃衍生环氧热固性

IF 7.4 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2025-10-09 DOI:10.1016/j.polymdegradstab.2025.111718

Gang Tang , Feilong Wang , Wei Yang , Cunlong Fu , Zicheng Xu , Xiuyu Liu , Xiaoyan Du , Xin Wang

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引用次数: 0

摘要

目前，大多数商用环氧热固性树脂都是由双酚A二缩水甘油酯（DGEBA）型环氧预聚物热固化而来，其制造高度依赖于化石资源。在过去的十年中，人们越来越多地致力于开发生物基环氧单体来取代dgeba型环氧预聚物，以实现可持续发展。dgeba型环氧热固性材料的另一个缺点是火灾危险性高。为解决上述问题，以糠胺为原料合成了生物基环氧单体N， N-二缩水甘油酯糠胺（DGFA），并以糠胺、糠醛和二苯基氧化膦（DPPO）为原料合成了生物基阻燃剂（ddda -DPPO）。以4,4′-二氨基二苯基甲烷（DDM）为固化剂，将ddf - dppo以不同的负荷量掺入DGFA中，制备了一系列阻燃型生物基环氧热固性材料。研究了DFDA-DPPO对DGFA/DDM热固性材料固化动力学、热稳定性、机械强度和阻燃性能的影响。具体来说，含磷量为1.5%的DGFA/DDM热固性材料的抗拉强度为81.9 MPa，冲击强度为16.7 kJ/m2， LOI为33.5%，UL94 V-0等级，玻璃化转变温度为98.5℃。此外，还研究了ddf - dppo在凝聚态和气相下的阻燃机理。该研究为制备具有综合力学性能、热稳定性和阻燃性的生物基环氧热固性材料提供了良好的替代材料。

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Furan-derived phosphine flame-retardant furan-derived epoxy thermosets with combined mechanical properties, thermal stability and flame retardancy

Currently, most commercial epoxy thermosets are derived from the thermal curing of diglycidyl ether of bisphenol A (DGEBA)-type epoxy prepolymers, whose manufacture is highly dependent upon fossil resources. Over the past decade, increasing efforts have been devoted to developing bio-based epoxy monomers to replace DGEBA-type epoxy prepolymers for sustainable development. Another shortcoming of DGEBA-type epoxy thermosets is their high fire risk. To overcome the above issues, a bio-based epoxy monomer, N, N-diglycidyl furfurylamine (DGFA), was synthesized from furfurylamine, and a bio-based flame retardant (DFDA-DPPO) was also synthesized from furfurylamine, furfural, and diphenylphosphine oxide (DPPO). DFDA-DPPO was incorporated into DGFA at different loadings to prepare a series of flame-retardant bio-based epoxy thermosets, with 4, 4’-diaminodiphenylmethane (DDM) as a hardener. The influence of DFDA-DPPO on the curing kinetics, thermal stability, mechanical strength and flame-retardant properties of DGFA/DDM thermosets was investigated. Specifically, the DGFA/DDM thermoset with a 1.5 % phosphorus content achieved a tensile strength of 81.9 MPa, an impact strength of 16.7 kJ/m², an LOI of 33.5 %, a UL94 V-0 rating, and a glass transition temperature of 98.5 °C. Furthermore, the flame-retardant mechanisms of DFDA-DPPO were also studied in both the condensed and gaseous phases. This work provides a good substitute for DGEBA in the fabrication of bio-based epoxy thermosets with combined mechanical properties, thermal stability and flame retardancy.

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.