| 王洋钰,张志远,蒋姗.化学通报,2023,86(8):1005-1011. |
| 聚磷腈微球的制备及其阻燃PET的研究 |
| Preparation of Polyphosphazene Microspheres and Research on Flame Retardant PET |
| 投稿时间：2022-12-28 修订日期：2023-01-28 |
| DOI： |
| 中文关键词: 聚对苯二甲酸乙二醇酯 磷腈 微球 热稳定性 阻燃 |
| 英文关键词:polyethylene terephthalate, phosphazene, microspheres, thermal stability, flame retardant |
| 基金项目: |
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| 中文摘要: |
| 采用沉淀聚合法制备聚环三磷腈-co-(3,4-二羟基苯甲酸)微球Poly(HCCP-co-PCA),通过FT-IR、SEM和TGA等测试对其进行表征,研究单体摩尔比对微球的结构、微观形貌以及热稳定性能的影响,其中n(HCCP)/n(PCA)为1/0.5时,聚磷腈微球的粒径较为均一,分散均匀,直径为1.5 μm左右,并且具有优异的热稳定性能和成炭性能。采用熔融共混法利用密炼机制备PET/Poly(HCCP-co-PCA)复合材料,研究Poly(HCCP-co-PCA)的用量对复合材料阻燃性能的影响,并探究其阻燃机理。结果表明,随着Poly(HCCP-co-PCA)含量的增加,复合材料的阻燃性能明显提高。当Poly(HCCP-co-PCA)添加量为1.5%时,复合材料通过UL 94-V0等级测试,极限氧指数为28.8%,并且热释放速率峰值和总热释放量分别降低了75.26%和69.07%。结合残炭以及TG-IR测试分析,Poly(HCCP-co-PCA)的添加起到凝聚相和气相阻燃作用。 |
| 英文摘要: |
| Polyphosphazene-co-(3,4-dihydroxybenzoic acid) microspheres Poly(HCCP-co-PCA) were prepared by precipitation polymerization, characterized by FT-IR, SEM and TGA tests, and the effects of monomer molar ratio on the structure, microscopic morphology and thermal stability properties of the microspheres were investigated. Where n(HCCP)/n(PCA) is 1/0.5, the particle size of polyphosphazene microspheres is more homogeneous and uniformly dispersed, with a diameter of about 1.5 μm, and they have excellent thermal stability performance and carbon formation performance.. The PET/Poly (HCCP-co-PCA) composites were prepared by the melt blending method using an internal mixer. The effect of the amount of Poly (HCCP-co-PCA) on the flame retardant properties of the composites was studied, and its flame retardant mechanism was explored. The results show that the flame retardant properties of the composites improves significantly with the increase of Poly(HCCP-co-PCA) content. When Poly(HCCP-co-PCA) is added at 1.5%, the composite passes the UL 94-V0 grade test with an ultimate oxygen index of 28.8%, and the peak heat release rate and total heat release are reduced by 75.26% and 69.07%, respectively. Combined with the residual carbon and TG-IR test analysis, the addition of Poly(HCCP-co-PCA) plays a cohesive phase and gas phase flame retardant role. |
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