A novel multi-functional polymeric curing agent: Synthesis, characterization, and its epoxy resin with simultaneous excellent flame retardance and transparency

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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Study of Thermal Properties of Curing of DGEBA Epoxy Resin with Hexakis-(4-Aminophenoxy)-Cyclotriphosphazene

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.284-286.365 ◽

2011 ◽

Vol 284-286 ◽

pp. 365-368 ◽

Cited By ~ 3

Author(s):

Jing Zhu ◽

Yong Wu ◽

Lei Zhao ◽

Hong Liang Wei ◽

Hui Juan Chu ◽

...

Keyword(s):

Thermal Properties ◽

Thermogravimetric Analysis ◽

Epoxy Resin ◽

Epoxy Resins ◽

Chemical Structure ◽

Diglycidyl Ether ◽

Flame Retardance ◽

Curing Agent ◽

Degradation Behaviors ◽

Curing Agents

Hexakis-(4-aminophenoxy)-cyclotriphosphazene (PN-NH2) was synthesized through nucleophilic substitution of the chloride atoms of hexachlorocyclotriphosphazene (HCCP) and reduction of the nitro group, and its chemical structure was characterized. As a curing agents for commercial epoxy resin Diglycidyl ether of bisphenol-A (DGEBA) PN-NH2 was compared with conventional curing agents 4,4-diaminodiphenylsulfone(DDS) and 4,4-diaminodiphenylmethane (DDM). The thermal properties and thermal degradation behaviors of these thermosetted resins were investigated by using thermogravimetric analysis (TGA). TGA studies demonstrated that the thermal properties of the PN-NH2-containing cured epoxy resin were higher than those of others. The phosphorus-nitrogen containing curing agent can result in a great improvement of the flame retardance for their thermosetted epoxy resins.

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A bio-based phosphorus-containing co-curing agent towards excellent flame retardance and mechanical properties of epoxy resin

Polymer Degradation and Stability ◽

10.1016/j.polymdegradstab.2021.109548 ◽

2021 ◽

Vol 187 ◽

pp. 109548

Author(s):

Jianfan Cao ◽

Huajun Duan ◽

Jiahao Zou ◽

Junjun Zhang ◽

Huiru Ma

Keyword(s):

Mechanical Properties ◽

Epoxy Resin ◽

Flame Retardance ◽

Curing Agent ◽

Phosphorus Containing

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Preparation and analysis of a flexible curing agent for epoxy resin

Journal of Applied Polymer Science ◽

10.1002/app.30893 ◽

2009 ◽

Vol 114 (5) ◽

pp. 2706-2710 ◽

Cited By ~ 10

Author(s):

Y. Yang ◽

Gong Chen ◽

K. M. Liew

Keyword(s):

Epoxy Resin ◽

Curing Agent

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Synthesis of antibacterial polyether biguanide curing agent and its cured antibacterial epoxy resin

Designed Monomers & Polymers ◽

10.1080/15685551.2021.1900025 ◽

2021 ◽

Vol 24 (1) ◽

pp. 63-72

Author(s):

Rui Li ◽

Guoxing Yang ◽

Yudan Wang ◽

Lijia Liu ◽

Qiang Wang ◽

...

Keyword(s):

Epoxy Resin ◽

Curing Agent

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Preparation and characterization of polydopamine/melamine microencapsulated red phosphorus and its flame retardance in epoxy resin

RSC Advances ◽

10.1039/d1ra03164c ◽

2021 ◽

Vol 11 (33) ◽

pp. 20391-20402

Author(s):

Chen Cheng ◽

Yanling Lu ◽

Weining Ma ◽

Shaojie Li ◽

Jun Yan ◽

...

Keyword(s):

Flame Retardant ◽

Epoxy Resin ◽

Shell Structure ◽

Composite Shell ◽

Intumescent Flame Retardant ◽

Smoke Suppression ◽

Flame Retardance ◽

Red Phosphorus ◽

Composite Shell Structure

Red phosphorus was coated by a polydopamine/melamine composite shell structure, which constituted an intumescent flame retardant with superior flame retardance and smoke suppression performance for epoxy resin.

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