Epoxy-Functionalized Polysiloxane and DOPO Synergistically Enhance Flame Retardancy of Epoxy Resin Composites

IF 4.4 2区化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Polymer Materials Pub Date : 2025-04-14 DOI:10.1021/acsapm.5c0053110.1021/acsapm.5c00531

Yang Zhang, Xuan Wu, Yixiao Shi, Dan Liao, Jiaen Qian, Chuan Wu*, Hong Dong, Qinghua Pan, Zhirong Qu and Yanjiang Song*,

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Abstract

A series of intrinsic flame-retardant epoxy resins were prepared by adding dual epoxy-functionalized polysiloxane (PDMS-GE) and DOPO to the epoxy resin (EP) of the DGEBA/DDM (60/20) system for curing reaction. The results showed that PDMS-GE and DOPO had excellent synergistic flame retardancy on EP, which was conducive to the formation of large-sized SiO₂ particles and the formation of stable and dense char when the material burns. In this work, the LOI of the composite DGEBA/DDM/PDMS-GE/DOPO (60/20/5/5) reached 37.3, which was better than that of the material with only PDMS-GE or DOPO added and was 11.4 higher than that of neat EP. Compared with neat EP, the PHRR and THR of the CCT test were also reduced by 51.0 and 48.0%, respectively, and its UL-94 test reached the V-0 level. At the same time, the material also showed good hydrophobicity, and its water contact angle reached 102.63°. Based on the good dielectric properties and molecular chain flexibility of the PDMS structure, the dielectric constant of the prepared composite material at 14.2 GHz was reduced to 2.63, and the impact strength was also improved by about 33% relative to neat EP.

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环氧官能化聚硅氧烷与DOPO协同增强环氧树脂复合材料的阻燃性

将双环氧功能化聚硅氧烷（PDMS-GE）和DOPO加入到DGEBA/DDM（60/20）体系的环氧树脂（EP）中进行固化反应，制备了一系列本征阻燃环氧树脂。结果表明，PDMS-GE和DOPO对EP具有优异的协同阻燃性，有利于材料在燃烧时形成大尺寸SiO2颗粒，形成稳定致密的焦炭。本研究中，复合材料DGEBA/DDM/PDMS-GE/DOPO（60/20/5/5）的LOI达到37.3，优于只添加PDMS-GE或DOPO的材料，比纯EP的LOI高11.4。与纯EP相比，CCT试验的PHRR和THR分别降低了51.0%和48.0%，其UL-94试验达到V-0水平。同时，该材料还表现出良好的疏水性，其水接触角达到102.63°。基于PDMS结构良好的介电性能和分子链柔韧性，制备的复合材料在14.2 GHz时的介电常数降低到2.63，冲击强度也比纯EP提高了约33%。

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来源期刊

ACS Applied Polymer Materials Multiple-

CiteScore

7.20

自引率

6.00%

发文量

810

期刊介绍： ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.