首页|季戊四醇芳基膦酸酯的制备及阻燃环氧树脂作用机制

季戊四醇芳基膦酸酯的制备及阻燃环氧树脂作用机制

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为了提高环氧树脂(EP)的阻燃性能,以传统的成炭剂季戊四醇(PER)和苯基膦酰二氯(PPDC)为原料,通过亲核取代反应成功制备了阻燃剂季戊四醇芳基膦酸酯(PBPP).并将其引入到EP基体中,制备了阻燃EP复合材料.通过测试表明,当PBPP的质量分数为6%时,EP/PBPP6复合材料顺利获得了 UL-94 V-0级,极限氧指数达32.5%,且EP材料的熔滴得到了明显的抑制.热重分析表明,PBPP的引入促进了 EP基体的提前降解炭化,使得EP/PBPP复合材料表面形成了致密且坚硬的炭层,其有效地在凝聚相中发挥了屏障作用,使得EP/PBPP复合材料的PHRR和THR相比于纯EP,分别降低了 66.9%和50.4%.此外,PBPP在分解过程中产生的含磷自由基有效地在气相中发挥了抑制作用,使EP/PBPP复合材料的av-EHC显著降低,赋予了 EP优异的火安全性能.
Preparation of Pentaerythritol Aryl Phosphonates and Their Mechanisms in Flame Retardant Epoxy Resins
In order to improve the flame retardant performance of epoxy resin(EP),the flame retardant pentaerythritol aryl phosphonate(PBPP)was successfully prepared by nucleophilic substitution reaction using the traditional char-forming agents pentaerythritol(PER)and phenylphosphonyl dichloride(PPDC)as raw materials.PBPP was introduced into the EP matrix to prepared flame retardant EP composites.The tests show that the EP/PBPP6 composites successfully obtain UL-94 V-0 rating with the limiting oxygen index(LOI)of 32.5%when the mass fraction of PBPP is 6%,and the melting droplets of EP/PBPP are significantly suppressed.Thermogravimetric analysis show that the addition of PBPP promotes the early degradation and charring of the EP matrix and results in the formation of a dense and hard char layer on the surface of EP/PBPP composites,which effectively acts as barrier in condensed phase.Thus,the PHRR and THR of EP/PBPP composites are reduced by 66.9%and 50.4%compared to pure EP.In addition,the phosphorus-containing radicals generated during the decomposition of PBPP effectively exert the inhibiting effect in gas phase,resulting in a significant reduction in the av-EHC of EP/PBPP composites and endowing the EP composites with excellent fire safety properties.

epoxy resinaryl phosphate esterflame-retardant performanceflame-retardant mechanism

陈泳齐、熊莹欣、阎辰涛、王春敏、李斌、刘鲁斌

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黑龙江省阻燃材料分子设计与制备重点实验室,黑龙江哈尔滨 150040

森林植物生态学教育部重点实验室,黑龙江哈尔滨 150040

嘉兴领科材料技术有限公司,浙江嘉兴 314000

环氧树脂 芳基膦酸酯 阻燃性能 阻燃机理

国家自然科学基金资助项目国家自然科学基金资助项目中央高校基本科研业务费黑龙江省重点研发计划东北林业大学大学生创新训练计划

52203082523730532572022BU02GZ20220056S202210225155

2024

高分子材料科学与工程
中国石油化工股份有限公司科技开发部 国家自然科学基金委员会化学科学部 高分子材料工程国家重点实验室 四川大学高分子研究所

高分子材料科学与工程

CSTPCD北大核心
影响因子:0.563
ISSN:1000-7555
年,卷(期):2024.40(6)
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