Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 304, Issue 4, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.201800619
Keywords
flame retardancy; mechanical properties; multi-element synergistic effects; thermal properties
Funding
- National Natural Science Foundation of China [21805036]
- Project of Education Department of Fujian Province [JK2017010]
- Natural Science Foundation of Fujian Province [2016J01045]
- Fujian Provincial Health Education Joint Research Project [WKJ2016-2-11]
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To obtain epoxy resins with satisfactory thermal, flame retardant, and mechanical properties, a novel multi-elementsynergistic flame retardant (PPVSZ) is synthesized through the reaction between PH of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and CC of polysilazane (PVSZ) and utilized as a multi-element synergistic flame retardant for epoxy resins. The flame retardant mechanism is explored by XPS and SEM, confirming that the excellent flame-retardance efficiency owes itself to an optimal flame retardant way which jointly exerts the flame-retardant effects in the gaseous and condensed phase. The thermal properties deduced from DSC, TGA, and DMA, indicate the glass transition temperature, maximum weight loss rate, and char yields at 700 degrees C for EP-2 increase by about 5.0 degrees C, 8.4 degrees C and 8.8%, respectively. Furthermore, mechanical properties such as impact strength, tensile strength, and flexural strength are also increased by 45.38%, 14.16%, and 17.43%, respectively, which show that the incorporation of PPVSZ does not deteriorate the mechanical properties of modified resin. All the results demonstrate that epoxy resins modified by PPVSZ not only have good effect on the flame retardance, but also have good improvement on thermal and mechanical properties, indicating the potential for applications in many fields requiring fire safety.
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