Synthesis and Flame Retardancy of Silicon and Phosphorus Modified Epoxy Resin

被引：0
作者：
Cao D. [1 ]
Liu J. [1 ]
Ji Y. [1 ]
Hu H. [2 ]
Chen X. [1 ]
Li C. [2 ]
Chen Z. [1 ]
Li S. [1 ,2 ]
机构：
[1] State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan
[2] Hubei Key Laboratory of Theory, Application of Advanced Materials Mechanics, Wuhan University of Technology, Wuhan
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2023年 / 39卷 / 10期
关键词：
DOPO-HQ; epoxy resin; flame retardance; siloxane; tensile property;
D O I：
10.16865/j.cnki.1000-7555.2023.0215
中图分类号：
学科分类号：
摘要：
The oxygen index of phosphorus modified epoxy is high, but the mechanical properties are reduced and the smoke suppression effect is not obvious. The silicon modified epoxy has the characteristics of toughening and temperature resistance, but its oxygen index is low. In order to meet the requirements of fire safety and mechanical properties of epoxy resin in engineering applications, the resin with excellent comprehensive properties was obtained by silicon phosphate co- flame retardant modification. In this paper, polyphenylpropyl siloxane (Z- 6018) and 10- (2,5-dihydroxyphenyl) -10-hydrogen-9-oxa-10-phosphorus-phene-10-oxide (DOPO-HQ) were used as carriers to introduce silicon phosphorus elements into epoxy resin by chemical grafting. Silicon-modified epoxy resin (B-30), phosphorus-modified epoxy resin (P- 27) and silicon- phosphorus- modified epoxy resin (B- P) were prepared, and their chemical structures were confirmed by infrared spectroscopy. The mechanical properties, flame retardant properties, flame retardant mechanism and smoke suppression mechanism of the resins were studied by tensile test, TGA, LOI, CCT, SEM and EDS. The tensile strength of B-P is 75.0 MPa, which is 15.4%, 67.7% and 44.2% higher than that of E-51, P-27 and B-30, respectively. However, compared with E-51, P-27 and B-30 have reduced tensile strength, which reflects the strength synergy of "brittle" and "tough" blending. The flame retardant performance test shows that B-P inherits the significant smoke suppression of B-30 and higher LOI of P-27 respectively, and has no synergistic effect on ignition and flame seeding. The amount of residual silicon and phosphorus elements after combustion of B-P is significantly greater than that of single modified resin, and the appearance of residue combines the characteristics of single modified silicon and phosphorus, forming a compact and hard micro composite structure, which reflects the synergistic effect of composition and structure. © 2023 Chengdu University of Science and Technology. All rights reserved.
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页码：40 / 50
页数：10
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