Synthesis of DOPO‐based pyrazine derivative and its effect on flame retardancy and thermal stability of epoxy resin

2019 ◽  
Vol 30 (9) ◽  
pp. 2331-2339 ◽  
Author(s):  
Hao Tang ◽  
ZongMin Zhu ◽  
Rui Chen ◽  
JunJie Wang ◽  
Hong Zhou
Keyword(s):  
Thermal Stability ◽  
Epoxy Resin ◽  
Flame Retardancy ◽  
Pyrazine Derivative ◽  
Thermal Stability Of

Intumescent Flame Retardant Epoxy Resins Based on Condensation Polymers of P-Phenylenediamine and Bispirocyclic Pentaerythritol Diphosphate

2012 ◽  
Vol 482-484 ◽  
pp. 1863-1868 ◽  
Author(s):  
Ya Wen Huang ◽  
Jia Jun Ma ◽  
Jun Xiao Yang
Keyword(s):  
Thermal Stability ◽  
Thermogravimetric Analysis ◽  
Epoxy Resin ◽  
Flame Retardancy ◽  
Epoxy Resins ◽  
Char Residue ◽  
Retarding Effect ◽  
Condensation Polymers ◽  
Thermal Stability Of ◽  
Sem Investigation

Copolymer of p-phenylenediamine and bispirocyclic pentaerythritol diphosphate was synthesized and characterized by FTIR and 1H NMR. This polymer was used to prepare epoxy resin/SPDA composites. Thermal stability of SPDA and epoxy/SPDA composites were investigated by thermogravimetric analysis (TGA), and their flammability were investigated by the LOI test. TGA results showed that the addition of SPDA improved the char residue of epoxy resin. SEM investigation showed that the residual chars have a honeycomb-like structure, indicating an intumescent flame retarding effect of SPDA in composites. In addition, all of above results confirmed that accelerate carbonization play a key role in improving flame retardancy of epoxy resin.

scholarly journals The effects of DOPO modified Co-based metalorganic framework on flame retardancy, stiffness and thermal stability of epoxy resin

RSC Advances ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 6781-6790
Author(s):  
Liyun Cai ◽  
Fei Xin ◽  
Congcong Zhai ◽  
Yu Chen ◽  
Bo Xu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
Epoxy Resin ◽  
Flame Retardancy ◽  
Damping Coefficient ◽  
Carbonization Process ◽  
Metalorganic Framework ◽  
Thermal Stability Of

The DOPO@ZIF-67 promoted the carbonization process of the EP flame retardant composites, and the rigidity and damping coefficient of EP composites are also improved compared with pure EP.

Nanocomposite Epoxy Resin for SiC Module

2011 ◽  
Vol 2011 (HITEN) ◽  
pp. 000196-000200 ◽  
Author(s):  
Kenji Okamoto ◽  
Yuji Takematsu ◽  
Miyako Hitomi ◽  
Yoshinari Ikeda ◽  
Yoshikazu Takahashi
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Epoxy Resin ◽  
Molecular Motion ◽  
Experimental Results ◽  
Power Module ◽  
Operation Temperature ◽  
Thermal Stability Of

There is a demand to improve the thermal stability of epoxy molding resins used in the power module of SiC power chips operating at temperatures of 200°C or more. This paper describes a technique for increasing the thermal stability of the resin by decreasing molecular motion through the addition of nanofiller. The experimental results showed that the glass transition temperature (Tg) of the epoxy resin increased by approximately 30°C when the silica nanofiller was added. The epoxy resin added nanofiller was investigated in order to achieve the operation temperature 200°C of power module.

Flame-retardant behaviors of aluminum phosphates coated sepiolite in epoxy resin

2020 ◽  
pp. 073490412093408
Author(s):  
Wei Yan ◽  
Pu Xie ◽  
Zhengwei Yang ◽  
Guangjin Luo ◽  
Weijiang Huang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
Epoxy Resin ◽  
Mechanical Performance ◽  
Oxygen Index ◽  
One Pot ◽  
Heterogeneous Precipitation ◽  
Aluminum Phosphates ◽  
Thermal Stability Of ◽  
Limited Oxygen

Aluminum phosphates coated sepiolite nanocomposite was fabricated via a simple one-pot heterogeneous precipitation strategy, and the effects of aluminum phosphates on the morphology of aluminum phosphates coated sepiolite were investigated. Moreover, the effect of aluminum phosphates coated sepiolite on the flame-retardant behavior, mechanical properties, and thermal stability of epoxy resin have been discussed. The results indicated that the introduction of only 20 wt% aluminum phosphates coated sepiolite in epoxy resin increased the limited oxygen index from 21.8% to 30.1%, thus the material met the UL-94 V-0 rating. Thermogravimetric analyses revealed that char yield increased in the presence of aluminum phosphates coated sepiolite form thermally stable carbonaceous char. Aluminum phosphates–coated sepiolite could improve the mechanical performance, thermal stability of epoxy resin.

Synthetic novel, convenient and eco-friendly Si/P/N synergistic treatment agent to improve the flame retardancy and thermal stability of cotton fabrics

Cellulose ◽  
2020 ◽  
Vol 27 (17) ◽  
pp. 10473-10487
Author(s):  
Zheng Zhang ◽  
Dezheng Kong ◽  
Heng Sun ◽  
Ling Sun ◽  
Chaohong Dong ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Flame Retardancy ◽  
Cotton Fabrics ◽  
Treatment Agent ◽  
Thermal Stability Of

scholarly journals Investigation of the Structure-Property Effect of Phosphorus-Containing Polysulfone on Decomposition and Flame Retardant Epoxy Resin Composites

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 380 ◽  
Author(s):  
Wei Zhao ◽  
Yongxiang Li ◽  
Qiushi Li ◽  
Yiliang Wang ◽  
Gong Wang
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
Phosphorus Content ◽  
Structure Property ◽  
Scanning Calorimetry ◽  
Inhibition Effect ◽  
Phosphorus Containing ◽  
High Degree ◽  
Thermal Stability Of

The flame retardant modification of epoxy (EP) is of great signification for aerospace, automotive, marine, and energy industries. In this study, a series of EP composites containing different variations of phosphorus-containing polysulfone (with a phosphorus content of approximately 1.25 wt %) were obtained. The obtained EP/polysulfone composites had a high glass transition temperature (Tg) and high flame retardancy. The influence of phosphorus-containing compounds (ArPN2, ArPO2, ArOPN2 and ArOPO2) on the thermal properties and flame retardancy of EP/polysulfone composites was investigated by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), a UL-94 vertical burning test, and cone calorimeter tests. The phosphorus-containing polysulfone enhanced the thermal stability of EP. The more stable porous char layer, less flammable gases, and a lower apparent activation energy at a high degree of conversion demonstrated the high gas inhibition effect of phosphorus-containing compounds. Moreover, the gas inhibition effect of polysulfone with a P–C bond was more efficient than the polysulfone with a P–O–C bond. The potential for optimizing flame retardancy while maintaining a high Tg is highlighted in this study. The flame-retardant EP/polysulfone composites with high thermal stability broaden the application field of epoxy.

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