Salen-金属络合物型聚磷腈在环氧树脂中的阻燃性能

摘要/Abstract

摘要： 为了降低环氧树脂(EP)的火灾风险,采用缩聚法制备了三种新型的Salen-金属络合物型聚磷腈Salen-PZN-M(M=Ni, Zn, Cu).利用红外光谱(FTIR),电镜(SEM),X射线光电子能谱(XPS)对Salen-PZN-M的结构和形貌进行了表征;利用热重分析法(TGA)、锥形量热仪(CCT)表征了复合材料的热稳定性和燃烧性能;利用热重红外分析光谱(TG-FTIR)、SEM、拉曼测试(LRS)、FTIR分析了Salen-PZN-M/EP的阻燃机理.TGA结果表明当添加质量分数为5%的Salen-PZN-M时,不同的配位金属对复合材料有不同的影响.在锥形量热试验中,掺有质量分数为5%的Salen-PZN-M的阻燃EP的总热释放量(PHRR)、总烟释放量(TSP)与有毒CO气体的释放量相比纯EP分别最大降低了20.41%、37%和16.93%.TG-FTIR结果表明,Salen-PZN-M可以减少有害气体的形成.Salen-PZN-M的阻燃机理可能是气相猝灭、不可燃气体释放、协同催化碳化效应和极热稳定组分的形成.

关键词: Salen-金属络合物型聚磷腈, 热稳定性, 阻燃性能

Abstract: In order to reduce the fire risk of epoxy resin (EP), three new types of Salen-metal complex polyphosphazene Salen-PZN-M(M = Ni, Zn, Cu) was prepared by condensation polymerization.The structure and morphology of Salen- PZN-M were characterized by infrared spectroscopy (FTIR), electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS).Thermogravimetric analysis (TGA) and conical calorimeter (CCT) were used to characterize the thermal stability and combustion performance of the composite.The flame retardant mechanism of Salen-PZN-M/EP was analyzed by TG-FTIR, SEM, Raman test (LRS) and FTIR.TGA results showed that when Salen-PZN-M (mass fraction 5%)was added, different coordination metals had different effects on the composite.In the conical calorimetric test, the total heat release (PHRR) and total smoke release (TSP) of flame-retardant EP mixed with Salen-PZN-M(mass fraction 5%) were reduced by 20.41%, 37% and 16.93%, respectively, compared with the release of toxic CO gas.TG-FTIR results showed that Salen-PZN-M could reduce the formation of harmful gases.The flame retardant mechanism of Salen-PZN-M may be gas phase quenching, non-flammable gas release, synergistic catalytic carbonization effect and formation of extremely thermal stable components.

Key words: Salen-metal complex polyphosphazene, thermal stability, flame retardant performance

中图分类号:

O633.13

杨保平, 王念念, 崔锦峰, 郭军红, 田力. Salen-金属络合物型聚磷腈在环氧树脂中的阻燃性能[J]. 兰州理工大学学报, 2021, 47(4): 66-75.

YANG Bao-ping, WANG Nian-nian, CUI Jin-feng, GUO Jun-hong, TIAN Li. Flame retardant property of Salen-metal complex polyphosphazenes in epoxy resin[J]. Journal of Lanzhou University of Technology, 2021, 47(4): 66-75.

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