Flame retardancy, thermal decomposition and mechanical properties of epoxy resin modified with copper N, N’-piperazine (bismethylene phosphonate)

A metal–organic phosphonate, i.e., copper N, N’-piperazine (bismethylene phosphonate) (CuPB) was synthesized and utilized to modify epoxy resin (EP). The flame retardancy, thermal decomposition and mechanical properties of EP/CuPB composites are overall evaluated, and the mechanism is tentatively di...

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Published in:Journal of thermal analysis and calorimetry 2022-02, Vol.147 (3), p.2155-2169
Main Authors: Wang, Wenduo, Wang, Zhengzhou
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Comparative analysis
Epoxy resins
Inorganic Chemistry
Measurement Science and Instrumentation
Mechanical properties
Phosphonates
Physical Chemistry
Polymer Sciences
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description A metal–organic phosphonate, i.e., copper N, N’-piperazine (bismethylene phosphonate) (CuPB) was synthesized and utilized to modify epoxy resin (EP). The flame retardancy, thermal decomposition and mechanical properties of EP/CuPB composites are overall evaluated, and the mechanism is tentatively discussed. The results reveal that EP containing 3.0 wt% CuPB (EP/CuPB-3) passes UL-94 V-0 grade with an increased limiting oxygen index of 28.5%. The peak heat release rate, total heat release, total smoke release and peak CO production rate of EP/CuPB-3 in cone calorimeter test are, respectively, reduced by 43.5%, 28.0%, 37.3% and 51.9%, compared to that of pure EP. Besides, a decreased mass-loss rate (16.2% min −1 ) and an increased char yield (26.8%) of EP/CuPB-3 in the thermogravimetric analysis are achieved as a result of the char-promotion function of CuPB. Satisfactorily, the thermal resistance of EP/CuPB composites is slightly improved with an increased glass transition temperature, and the mechanical properties including tensile and impact strengths are not much affected.
doi_str_mv 10.1007/s10973-021-10592-x
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The flame retardancy, thermal decomposition and mechanical properties of EP/CuPB composites are overall evaluated, and the mechanism is tentatively discussed. The results reveal that EP containing 3.0 wt% CuPB (EP/CuPB-3) passes UL-94 V-0 grade with an increased limiting oxygen index of 28.5%. The peak heat release rate, total heat release, total smoke release and peak CO production rate of EP/CuPB-3 in cone calorimeter test are, respectively, reduced by 43.5%, 28.0%, 37.3% and 51.9%, compared to that of pure EP. Besides, a decreased mass-loss rate (16.2% min −1 ) and an increased char yield (26.8%) of EP/CuPB-3 in the thermogravimetric analysis are achieved as a result of the char-promotion function of CuPB. 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The flame retardancy, thermal decomposition and mechanical properties of EP/CuPB composites are overall evaluated, and the mechanism is tentatively discussed. The results reveal that EP containing 3.0 wt% CuPB (EP/CuPB-3) passes UL-94 V-0 grade with an increased limiting oxygen index of 28.5%. The peak heat release rate, total heat release, total smoke release and peak CO production rate of EP/CuPB-3 in cone calorimeter test are, respectively, reduced by 43.5%, 28.0%, 37.3% and 51.9%, compared to that of pure EP. Besides, a decreased mass-loss rate (16.2% min −1 ) and an increased char yield (26.8%) of EP/CuPB-3 in the thermogravimetric analysis are achieved as a result of the char-promotion function of CuPB. 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subjects Analytical Chemistry
Chemistry
Chemistry and Materials Science
Comparative analysis
Epoxy resins
Inorganic Chemistry
Measurement Science and Instrumentation
Mechanical properties
Phosphonates
Physical Chemistry
Polymer Sciences
title Flame retardancy, thermal decomposition and mechanical properties of epoxy resin modified with copper N, N’-piperazine (bismethylene phosphonate)
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