The application of a phosphorus nitrogen flame retardant curing agent in epoxy resin

In order to improve the compatibility of flame retardant and epoxy resin, a phosphorus nitrogen flame retardant curing agent poly(p-xylylenediamine spirocyclic pentaerythritol bisphosphonate) (PPXSPB) was synthesized. FTIR, HNMR, and mass spectroscopy were used to identify the chemical structure of...

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Bibliographic Details
Published in:e-Polymers 2019-01, Vol.19 (1), p.545-554
Main Authors: Li, Anxin, Mao, Pingli, Liang, Bing
Format: Article
Language:English
Subjects:
Adhesive strength
curing agent
Curing agents
epoxy resin
Epoxy resins
Fire resistance
flame retardant
Flame retardants
Flammability
Heat release rate
Impact strength
Materials science
Mechanical properties
Organic chemistry
Phosphorus
Phosphorus content
Polymers
property
synthesis
Tensile strength
Thermal degradation
Thermal resistance
Water resistance
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Summary:In order to improve the compatibility of flame retardant and epoxy resin, a phosphorus nitrogen flame retardant curing agent poly(p-xylylenediamine spirocyclic pentaerythritol bisphosphonate) (PPXSPB) was synthesized. FTIR, HNMR, and mass spectroscopy were used to identify the chemical structure of PPXSPB. Epoxy resin (E-44) and PPXSPB as the raw material, a series of thermosetting systems were prepared. The effects of PPXSPB on flame retardancy, water resistance, thermal degradation behavior, mechanical properties and the adhesive strength of EP/PPXSPB thermosets were investigated. The results show that with the increase of phosphorus content, the oxygen index and carbon residue of the system both increased significantly, and the heat release rate gradually decreased, which is of great significance in delaying the occurrence of fire. When the phosphorus content is 3.24% in EP/PPXSPB thermosets, EP-2 can successfully pass the UL94 V-0 flammability rating, the LOI value of EP-2 can reach 31.4%, the impact strength and tensile strength was 6.58 kJ/m and 47.10 MPa respectively, and the adhesive strength was 13.79 MPa, the system presents a good overall performance.
ISSN:2197-4586
1618-7229
DOI:10.1515/epoly-2019-0058