scholarly journals Impact of halogen-free flame retardant with varied phosphorus chemical surrounding on the properties of diglycidyl ether of bisphenol-A type epoxy resin: synthesis, fire behaviour, flame-retardant mechanism and mechanical properties

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 59226-59236 ◽  
Author(s):  
Xiaomin Zhao ◽  
Heeralal Vignesh Babu ◽  
Javier Llorca ◽  
De-Yi Wang
Keyword(s):  
Mechanical Properties ◽  
Bisphenol A ◽  
Flame Retardant ◽  
Epoxy Resin ◽  
Flame Retardants ◽  
Diglycidyl Ether ◽  
Fire Behaviour ◽  
Halogen Free

This work aimed to investigate the effect of two types ofphosphorus-containing flame retardants (P-FRs) with different chemical surroundings on flame-retardant efficiency for diglycidyl ester of bisphenol-A type epoxy (EP).

Experimental study on the mechanical properties of an epoxy-based nanocomposite using polymeric alloying and different nano-reinforcements: nanofiber, nanolayered and nanoparticulate materials

2015 ◽  
Vol 22 (6) ◽  
Author(s):  
Yasser Rostamiyan ◽  
Abdolhossein Fereidoon ◽  
Amin Hamed Mashhadzadeh
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Carbon Nanotube ◽  
Bisphenol A ◽  
Epoxy Resin ◽  
Diglycidyl Ether ◽  
Epoxy System ◽  
Different Types ◽  
Multi Wall Carbon Nanotube

AbstractThis study investigated the effect of four different types of reinforcements on the mechanical properties of an epoxy system. The epoxy resin used was diglycidyl ether of bisphenol A (DGEBA) cured by cycloaliphatic polyamine. These four mechanisms use a multi-wall carbon nanotube (MWCNT) as a nanofiber, clay as a nanolayer, SiO

scholarly journals Towards Selection Charts for Epoxy Resin, Unsaturated Polyester Resin and Their Fibre-Fabric Composites with Flame Retardants

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1181
Author(s):  
Noha Ramadan ◽  
Mohamed Taha ◽  
Angela Daniela La Rosa ◽  
Ahmed Elsabbagh
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Epoxy Resin ◽  
Flame Retardancy ◽  
Flame Retardants ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Polymeric Materials ◽  
Polyester Resins ◽  
Thermosetting Polymers

Epoxy and unsaturated polyester resins are the most used thermosetting polymers. They are commonly used in electronics, construction, marine, automotive and aircraft industries. Moreover, reinforcing both epoxy and unsaturated polyester resins with carbon or glass fibre in a fabric form has enabled them to be used in high-performance applications. However, their organic nature as any other polymeric materials made them highly flammable materials. Enhancing the flame retardancy performance of thermosetting polymers and their composites can be improved by the addition of flame-retardant materials, but this comes at the expense of their mechanical properties. In this regard, a comprehensive review on the recent research articles that studied the flame retardancy of epoxy resin, unsaturated polyester resin and their composites were covered. Flame retardancy performance of different flame retardant/polymer systems was evaluated in terms of Flame Retardancy index (FRI) that was calculated based on the data extracted from the cone calorimeter test. Furthermore, flame retardant selection charts that relate between the flame retardancy level with mechanical properties in the aspects of tensile and flexural strength were presented. This review paper is also dedicated to providing the reader with a brief overview on the combustion mechanism of polymeric materials, their flammability behaviour and the commonly used flammability testing techniques and the mechanism of action of flame retardants.

scholarly journals Improving flame-retardant, thermal, and mechanical properties of an epoxy using halogen-free fillers

2018 ◽  
Vol 25 (5) ◽  
pp. 939-946 ◽  
Author(s):  
Ramin Riahipour ◽  
Abolfazl Alizadeh Sahraei ◽  
Nekoda van de Werken ◽  
Mehran Tehrani ◽  
Karen Abrinia ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Flame Retardant ◽  
Diglycidyl Ether ◽  
Thermal And Mechanical Properties ◽  
Limiting Oxygen Index ◽  
The Matrix ◽  
Stable Flame ◽  
Halogen Free ◽  
Nanostructured Silica

AbstractVarious nano- and micro-sized fillers can be integrated into polymers to enhance their flame-retardant performance. In this work, a diglycidyl-ether bisphenol A epoxy was used as the matrix and nanostructured silica aerogel (AG) and ammonium polyphosphate (APP) microparticles were investigated as fillers to improve the flame-retardant and thermal properties of the epoxy. The anti-flame, thermal, and mechanical properties of the composites were investigated for different volume fractions of filler particles. It was found that APP decreased the burning rate while significantly improving the thermal stability. To investigate the flame resistant properties of combined AG and APP, an optimized ratio of AG and APP was added to the epoxy, leading to a stable flame-retardant epoxy with a low thermal conductivity and improved glass transition temperature (Tg). The synergy between the AG and APP in composite samples resulted in an interesting burning behavior where sample core was relatively less deteriorated compared with the samples containing only APP or AG. This was attributed to the decrease of thermal conductivity due to the addition of AG. Lastly, samples containing APP showed the highest limiting oxygen index percentage and it was found that only small amounts of APP are required to make the epoxy flame-retardant.

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 Studies on the Modification of Commercial Bisphenol-A-Based Epoxy Resin Using Different Multifunctional Epoxy Systems

2021 ◽  
Vol 2 (2) ◽  
pp. 419-430
Author(s):  
Ankur Bajpai ◽  
James R. Davidson ◽  
Colin Robert
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Bisphenol A ◽  
Epoxy Resin ◽  
Tensile Fracture ◽  
Chemical Structures ◽  
Amino Phenol ◽  
Epoxy Systems

The tensile fracture mechanics and thermo-mechanical properties of mixtures composed of two kinds of epoxy resins of different chemical structures and functional groups were studied. The base resin was a bi-functional epoxy resin based on diglycidyl ether of bisphenol-A (DGEBA) and the other resins were (a) distilled triglycidylether of meta-amino phenol (b) 1, 6–naphthalene di epoxy and (c) fluorene di epoxy. This research shows that a small number of multifunctional epoxy systems, both di- and tri-functional, can significantly increase tensile strength (14%) over neat DGEBA while having no negative impact on other mechanical properties including glass transition temperature and elastic modulus. In fact, when compared to unmodified DGEBA, the tri-functional epoxy shows a slight increase (5%) in glass transition temperature at 10 wt.% concentration. The enhanced crosslinking of DGEBA (90 wt.%)/distilled triglycidylether of meta-amino phenol (10 wt.%) blends may be the possible reason for the improved glass transition. Finally, the influence of strain rate, temperature and moisture were investigated for both the neat DGEBA and the best performing modified system. The neat DGEBA was steadily outperformed by its modified counterpart in every condition.

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