| 毕竹韵,丁洪亮,崔全庆,刘晓华,何红飞,段皓睿,易宇翔,余彬.含磷阻燃聚氨酯复合材料的制备和性能研究[J].火灾科学,2025,34(3):204-218. |
| 含磷阻燃聚氨酯复合材料的制备和性能研究 |
| Preparation, properties and mechanism of flame-retardant polyurea blended with microencapsulated piperazine pyrophosphate and aluminum hypophosphate |
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| DOI：10.3969/j.issn.1004-5309.2025.03.05 |
| 基金项目:国家重点研发计划项目(2021YFB3700202);国家自然科学基金青年科学基金项目(52106187) |
| 作者 | 单位 | | 毕竹韵 | 中国科学技术大学火灾安全全国重点实验室,合肥,230026 | | 丁洪亮 | 中国科学技术大学火灾安全全国重点实验室,合肥,230026 | | 崔全庆 | 中国科学技术大学火灾安全全国重点实验室,合肥,230026 | | 刘晓华 | 中国科学技术大学火灾安全全国重点实验室,合肥,230026 | | 何红飞 | 中国科学技术大学火灾安全全国重点实验室,合肥,230026 | | 段皓睿 | 中国科学技术大学火灾安全全国重点实验室,合肥,230026 | | 易宇翔 | 中国科学技术大学火灾安全全国重点实验室,合肥,230026 | | 余彬** | 中国科学技术大学火灾安全全国重点实验室,合肥,230026 |
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| 中文关键词: 聚脲 阻燃 微胶囊化 力学性能 |
| 英文关键词:Polyurea Fire safety Microencapsulated Mechanical properties |
| 摘要点击次数: 38 |
| 全文下载次数: 40 |
| 中文摘要: |
| 为制备综合性能良好的聚脲材料,合成了三元胺1,3,5-三(2-三氟甲基-4-胺基苯氧基)苯(TFAPOB),将其引入异佛尔酮二异氰酸酯的体系中,提升了聚脲拉伸性能。制备得到的聚脲拉伸强度为38.61 MPa,断裂伸长率为522.05%。为进一步提升阻燃性能,在制备的聚脲基体中添加商用聚脲微胶囊化的焦磷酸哌嗪(PUPAPP)和次磷酸铝(PUAHP)。通过力学测试发现,经过微胶囊化处理的复合聚脲材料拉伸性能更好;当PUPAPP与PUAHP添加量分别为15 wt%和5 wt%时,复合聚脲材料阻燃性能较好,其氧指数值为24%,UL-94垂直燃烧级别为V-2;通过锥形量热仪测试发现,复配后聚脲热释放速率峰值降低了62.1%,热释放总量降低了33.4%。 |
| 英文摘要: |
| In order to prepare polyurea with good properties, 1,3,5-tris (2-trifluoromethyl-4-aminophenoxy) benzene (TFAPOB) was prepared and used as one of the chain extenders reacting with isophorone isocyanate (IPDI). With TFAPOB accounting for 20% of all amine, the polyurea was named as PUA20. The tensile strength of PUA20 was 38.61 MPa, and the elongation at break was 522%. To enhance the flame retardant performance, different proportions of inorganic flame retardants containing phosphorus, piperazine pyrophosphate (PAPP) and aluminum hypophosphate (AHP) were blended with PUA20. Commercial polyurea was used to produce flame-retardant microencapsulated materials, named PUPAPP and PUAHP. It was found that the polyurea composite material with coating treatment had better tensile properties. In flame-retardant performance tests, it was found that when the amounts of PUPAPP and PUAHP were 15 wt% and 5 wt%, respectively, the flame-retardant performance of the polyurea composite was best. The limiting oxygen index (LOI) of the polyurea composite material was 24% and it was classified as V-2 in the UL-94 vertical burning test. A decrease of 62.1% in peak heat release rate (PHRR) and a reduction of 33.4% in total heat release (THR) were found in the cone calorimeter test. |
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