HEACTP-DOPO and Aluminum Diethylphosphinate Synergistic Flame Retardant Epoxy Resin

被引：0
|
作者：
Junying Z. [1 ]
Runze G. [1 ]
Zhiyong Z. [1 ]
Yang L. [1 ]
Xiaoli L. [1 ]
机构：
[1] College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2023年 / 39卷 / 04期
关键词：
aluminum diethylphosphinate; cyclotriphosphazene macromolecule; epoxy resin; flame retardant properties;
D O I：
10.16865/j.cnki.1000-7555.2023.0074
中图分类号：
学科分类号：
摘要：
A novel flame retardant hexa- (N- hydroxyethylamino- DOPO- methine- phenoxy)cyclotriphosphazene (HEACTP-DOPO) was synthesized. Its chemical structure was well characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (1H-NMR, 31P-NMR) and high-resolution mass spectrometry (HRMS). Epoxy resin DGEBA was flamed retarded by the combination of HEACTP-DOPO and aluminum diethylphosphinate (ADP). The flame retardant and thermal stability properties of the cured epoxy resin were investigated by limited oxygen index (LOI), vertical burning test (UL-94), thermogravimetric analysis (TGA) and cone calorimetry (Cone). When merely 10 g HEACTP-DOPO and 3 g ADP were introduced into DGEBA substrate, the cured epoxy resin thermoset gains UL-94 V-0 grade and their LOI value reaches 37%. TGA results show that the introduction of compound flame retardant reduces the initial degradation temperature of epoxy resin and increases the amount of carbon residue at high temperature; Cone data indicate that compared with pure epoxy resin, the peak heat release rate (PHRR), total heat release (THR), average effective heat of combustion (Av-EHC), and total heat production (TSP) of the compound epoxy resin flame retardant cured product are reduced by 39.9%, 42.6%, 57.6%, and 7.5%,respectively. After the Cone test, the intumescent and expanded and compact carbon layer are produced on the surface of the flame retardant epoxy resin thermosets during combustion. Scanning electron microscope (SEM) and mapping confirm that amounts of N, P, and Al elements are distributed in the dense carbon layer, which effectively play the role of heat insulation and oxygen insulation, so that the flame retardant cured product is endowed with the superior flame retardant performance. © 2023 Chengdu University of Science and Technology. All rights reserved.
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页码：50 / 58
页数：8
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