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首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >The effect of a novel phosphorus-nitrogen reactive flame retardant curing agent on the performance of epoxy resin
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The effect of a novel phosphorus-nitrogen reactive flame retardant curing agent on the performance of epoxy resin

机译：新型磷 - 氮活性阻燃固化剂对环氧树脂性能的影响

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摘要

A phosphorus-nitrogen reactive flame retardant curing agent poly-(isophorondiamine spirocyclic pentaerythritol bisphosphonate) (PIPSPB) was synthesized. The chemical structure of the obtained compound was identified by FTIR, (HNMR)-H-1, and mass spectroscopies. Different proportions of DDS and PIPSPB were compounded as the curing agents to prepare a series of flame retardant epoxy resins with different phosphorus contents. The curing behavior of E-44/PIPSPB + DDS system was studied by DSC. A series of tests were conducted to characterize E-44/PIPSPB + DDS thermosetting system's performance. The result demonstrates that the residual carbon content of EP/PIPSPB + DDS system is obviously higher than that of EP/DDS system after 500 degrees C with the increase of phosphorus content in the system, and the heat release rate of the system during combustion is significantly reduced. The generated phosphorus-containing carbon layer is obviously foamed, which shows that the flame retardancy of the system is the result of the combined action of condensed phase and gas phase. When the phosphorus content is 1.77wt%, EP-3 successfully passed UL94 V-0 flammability rating, the LOI value was as high as 29%, the impact strength and tensile strength of it were 6.08KJ/m(2) and 49.10MPa respectively, the adhesive strength could reach 13.89 MPa, the system presents a good overall performance.
机译：合成了磷 - 氮活性阻燃固化剂Poly-（异佛索金属丝季戊四醇双膦酸酯）（PIPSPB）。通过FTIR，（HNMR）-H-1和质谱法鉴定所得化合物的化学结构。将不同比例的DDS和PIPSPB混合为固化剂，制备具有不同磷含量的一系列阻燃环氧树脂。通过DSC研究了E-44 / PIPSPB + DDS系统的固化行为。进行了一系列测试以表征E-44 / PIPSPB + DDS热固性系统的性能。结果表明，随着系统中磷含量的增加，EP / PIPSPB + DDS系统的残余碳含量明显高于EP / DDS系统的碳含量，并且在燃烧过程中系统的热释放速率是显着减少。产生的含磷碳层显然是发泡，这表明该系统的阻燃性是缩合相和气相的组合作用的结果。当磷含量为1.77wt％时，EP-3成功通过了UL94 V-0易燃性等级，LOI值高达29％，其冲击强度和拉伸强度为6.08kJ / m（2）和49.10MPa分别，粘合强度可达到13.89MPa，该系统具有良好的整体性能。

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