Synthesis, characterization and curing properties of a novel cyclolinear phosphazene-based epoxy resin for halogen-free flame retardancy and high performance

RSC Advances ◽  
2012 ◽  
Vol 2 (13) ◽  
pp. 5789 ◽  
Author(s):  
Jia Liu ◽  
Jiuying Tang ◽  
Xiaodong Wang ◽  
Dezhen Wu
Keyword(s):  
Epoxy Resin ◽  
Flame Retardancy ◽  
High Performance ◽  
Halogen Free

Flame-retardant halogen-free polymers using phosphorylated hexaglycidyl epoxy resin

2017 ◽  
Vol 30 (2) ◽  
pp. 202-210 ◽  
Author(s):  
Rasool Kheyrabadi ◽  
Hossein Rahmani ◽  
S Heydar Mahmoudi Najafi
Keyword(s):  
Flame Retardant ◽  
Epoxy Resin ◽  
Phosphine Oxide ◽  
Flame Retardancy ◽  
High Performance ◽  
Liquid Chromatography Mass Spectrometry ◽  
Scanning Calorimetry ◽  
Epoxy Monomer ◽  
Ul 94 ◽  
Halogen Free

Flame-retardant halogen-free epoxy resin, containing phosphorus and nitrogen atoms in the main chain, was synthesized through the curing of tris(3-(bis(oxiran-2-ylmethyl)amino)phenyl)phosphine oxide (HGE, hexaglycidyl epoxy monomer), starting from tris(3-aminophenyl) phosphine oxide (TAPO) and epichlorohydrin. The molecular structure of HGE with molecular weight 660 was confirmed using Fourier transform infrared, nuclear magnetic resonance, and liquid chromatography–mass spectrometry techniques. Epoxy equivalent weight determined by titration method was 120. The thermal curing behavior of the HGE/TAPO was investigated by differential scanning calorimetry. An intense exotherm due to curing reaction was observed in the temperature range from 123°C to 215°C. The HGE cured with TAPO, 4,4′-diaminodiphenylsulfone (DDS), and 1,5-diaminonaphthalene (DAN) and the thermal behaviors were studied by thermogravimetric analysis. The flame retardancy properties of the HGE/TAPO, DDS, and DAN were evaluated by vertical burning test (UL-94 V). The high performance cured epoxy resins showed high thermal stability and UL-94 V-0 flame retardancy rating.

scholarly journals Recent Developments in the Flame-Retardant System of Epoxy Resin

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2145 ◽  
Author(s):  
Quanyi Liu ◽  
Donghui Wang ◽  
Zekun Li ◽  
Zhifa Li ◽  
Xiaoliang Peng ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Heat Resistance ◽  
Flame Retardant ◽  
Epoxy Resin ◽  
Flame Retardancy ◽  
High Performance ◽  
Flame Retardants ◽  
Great Progress ◽  
Recent Developments ◽  
Halogen Free

With the increasing emphasis on environmental protection, the development of flame retardants for epoxy resin (EP) has tended to be non-toxic, efficient, multifunctional and systematic. Currently reported flame retardants have been capable of providing flame retardancy, heat resistance and thermal stability to EP. However, many aspects still need to be further improved. This paper reviews the development of EPs in halogen-free flame retardants, focusing on phosphorus flame retardants, carbon-based materials, silicon flame retardants, inorganic nanofillers, and metal-containing compounds. These flame retardants can be used on their own or in combination to achieve the desired results. The effects of these flame retardants on the thermal stability and flame retardancy of EPs were discussed. Despite the great progress on flame retardants for EP in recent years, further improvement of EP is needed to obtain numerous eco-friendly high-performance materials.

scholarly journals Properties of Cured Epoxy Resin/Phenoxy Resin Containing Carboxylic Groups and Phosphorus Blends for Halogen-free Flame-retardancy FPC Adhesives

2013 ◽  
Vol 49 (1) ◽  
pp. 17-23
Author(s):  
Naoki YOKOYAMA ◽  
Osamu AMESAWA ◽  
Katsunori SEKIYA ◽  
Katsuyuki AIDA ◽  
Shigeaki TAUCHI
Keyword(s):  
Epoxy Resin ◽  
Flame Retardancy ◽  
Carboxylic Groups ◽  
Halogen Free

scholarly journals Flame Retardancy of Carbon Nanotubes Reinforced Carbon Fiber/Epoxy Resin Composites

2019 ◽  
Vol 9 (16) ◽  
pp. 3275 ◽  
Author(s):  
Guo-qiang Chai ◽  
Guo-qing Zhu ◽  
Yunji Gao ◽  
Jinju Zhou ◽  
Shuai Gao
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Stability ◽  
Carbon Fiber ◽  
Epoxy Resin ◽  
Flame Retardancy ◽  
High Performance ◽  
Decomposition Temperature ◽  
Cone Calorimetry ◽  
Initial Decomposition Temperature ◽  
Solution Blending

In order to study the effect of carbon nanotubes (CNTs) on the flame retardancy of carbon fiber (CF)/epoxy resin (EP) composites, CF/EP and CNTs/CF/EP composites were prepared by solution blending. The flame retardancy and thermal stability were studied by cone calorimetry and thermogravimetric analysis. It was found that CNTs and CF had a certain synergistic effect on improving flame retardancy and thermal stability of EP. The peak heat release rate of F7N7, which represents the EP composites with 0.7 wt % CF and 0.7 wt % CNTs, was minimal. The total smoke production of F5N5 which represents the EP composites with 0.5 wt % CF and 0.5 wt % CNTs was the smallest, which was decreased by 43.04% more than the EP. The initial decomposition temperature of F7N7 was about 14 °C higher than that of F7, and the mass loss at Tmax was greatly reduced. The apparent activation energy of F7N7 is 2.7 kJ·mol−1 more than EP. Finally, the tensile and flexural strength of the composites were also improved, so it could be applied to a high-performance matrix of CF/EP composites, which are usually used as the advanced composites in the aerospace field.

High performance inkjet-printed QLEDs with 18.3% EQE: improving interfacial contact by novel halogen-free binary solvent system

Nano Research ◽  
2021 ◽  
Author(s):  
Ming Chen ◽  
Liming Xie ◽  
Changting Wei ◽  
Yuan-Qiu-Qiang Yi ◽  
Xiaolian Chen ◽  
...  
Keyword(s):  
High Performance ◽  
Solvent System ◽  
Binary Solvent ◽  
Interfacial Contact ◽  
Halogen Free
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