Reaction mechanism, cure behavior and properties of a multifunctional epoxy resin, TGDDM, with latent curing agent dicyandiamide

In this work, a flame retardant curing agent (DOPO-MAC) composed of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide DOPO and methyl acrylamide (MAC) was synthesized successfully, and the structure of the compound was characterized by FT-IR and 1H-NMR. The non-isothermal kinetics of the epoxy resin/DOPO-MAC system with 1% phosphorus was studied by non-isothermal DSC method. The activation energy of the reaction (Ea), about 46 kJ/mol, was calculated by Kissinger and Ozawa method, indicating that the curing reaction was easy to carry out. The flame retardancy of the epoxy resin system was analyzed by vertical combustion test (UL94) and limiting oxygen index (LOI) test. The results showed that epoxy resin (EP) with 1% phosphorus successfully passed a UL-94 V-0 rating, and the LOI value increased along with the increasing of phosphorus content. It confirmed that DOPO-MAC possessed excellent flame retardance and higher curing reactivity. Moreover, the thermal stability of EP materials was also investigated by TGA. With the DOPO-MAC added, the residual mass of EP materials increased remarkably although the initial decomposition temperature decreased slightly.

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Calorimetric Study of Cure Behavior of an Amine—Epoxy Resin under Ambient Conditions

ACS Symposium Series - Catalysis in Polymer Synthesis ◽

10.1021/bk-1992-0496.ch013 ◽

1992 ◽

pp. 170-181

Author(s):

Suk-fai Lau

Keyword(s):

Epoxy Resin ◽

Calorimetric Study ◽

Ambient Conditions ◽

Cure Behavior

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Phosphorus- and silicon-containing amino curing agent for epoxy resin

Iranian Polymer Journal ◽

10.1007/s13726-020-00808-6 ◽

2020 ◽

Vol 29 (5) ◽

pp. 433-443 ◽

Cited By ~ 5

Author(s):

Ajinkya Satdive ◽

Siddhesh Mestry ◽

Pavan Borse ◽

Shashank Mhaske

Keyword(s):

Epoxy Resin ◽

Curing Agent

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

e-Polymers ◽

10.1515/epoly-2019-0058 ◽

2019 ◽

Vol 19 (1) ◽

pp. 545-554 ◽

Cited By ~ 1

Author(s):

Anxin Li ◽

Pingli Mao ◽

Bing Liang

Keyword(s):

Flame Retardant ◽

Epoxy Resin ◽

Adhesive Strength ◽

Chemical Structure ◽

Phosphorus Content ◽

Raw Material ◽

Curing Agent ◽

Thermal Degradation Behavior ◽

Overall Performance ◽

The Impact

AbstractIn 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, 1HNMR, 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/m2 and 47.10 MPa respectively, and the adhesive strength was 13.79 MPa, the system presents a good overall performance.

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