Synergistic flame-retardant effect and mechanisms of boron/phosphorus compounds on epoxy resins

2017 ◽  
Vol 29 (1) ◽  
pp. 641-648 ◽  
Author(s):  
Shuo Tang ◽  
Lijun Qian ◽  
Yong Qiu ◽  
Yuping Dong
Keyword(s):  
Flame Retardant ◽  
Epoxy Resins ◽  
Phosphorus Compounds ◽  
Synergistic Flame Retardant

scholarly journals Preparation and properties of flame-retardant epoxy resins containing reactive phosphorus flame retardant

2020 ◽  
Vol 15 ◽  
pp. 155892502090132
Author(s):  
Sang-Hoon Lee ◽  
Seung-Won Oh ◽  
Young-Hee Lee ◽  
Il-Jin Kim ◽  
Dong-Jin Lee ◽  
...  
Keyword(s):  
Impact Strength ◽  
Flame Retardant ◽  
Epoxy Resin ◽  
Flame Retardancy ◽  
Epoxy Resins ◽  
Phosphorus Content ◽  
Phosphorus Compound ◽  
Phosphorus Compounds ◽  
Limiting Oxygen Index ◽  
The Impact

To prepare flame-retardant epoxy resin, phosphorus compound containing di-hydroxyl group (10-(2,5-dihydroxyphenyl)-9,10-dihydro-9-oxa-10-phospha phenanthrene-10-oxide, DOPO-HQ) was reacted with uncured epoxy resin (diglycidyl ether of bisphenol A, YD-128) and then cured using a curing agent (dicyandiamide, DICY). This study focused on the effect of phosphorus compound/phosphorus content on physical properties and flame retardancy of cured epoxy resin. The thermal decomposition temperature of the cured epoxy resins (samples: P0, P1.5, P2.0, and P2.5, the number represents the wt% of phosphorus) increased with increasing the content of phosphorus compound/phosphorus (0/0, 19.8/1.5, 27.8/2.0, and 36.8/2.5 wt%) based on epoxy resin. The impact strength of the cured epoxy resin increased significantly with increasing phosphorus compound content. As the phosphorus compound/phosphorus content increased from 0/0 to 36.8/2.5 wt%, the glass transition temperature (the peak temperature of loss modulus curve) increased from 135.2°C to 142.0°C. In addition, as the content of phosphorous compound increased, the storage modulus remained almost constant up to higher temperature. The limiting oxygen index value of cured epoxy resin increased from 21.1% to 30.0% with increasing phosphorus compound/phosphorus content from 0/0 to 36.8/2.5 wt%. The UL 94 V test result showed that no rating for phosphorus compounds less than 19.8 wt% and V-1 for 27.8 wt%. However, when the phosphorus compound was 36.8 wt%, the V-0 level indicating complete flame retardancy was obtained. In conclusion, the incorporation of phosphorus compounds into the epoxy chain resulted in improved properties such as impact strength and heat resistance, as well as a significant increase in flame retardancy.

Synergistic flame-retardant behavior and mechanism of tris(3-nitrophenyl) phosphine and DOPO in epoxy resins

2017 ◽  
Vol 132 (1) ◽  
pp. 483-491 ◽  
Author(s):  
Hang Luo ◽  
Feng Zhou ◽  
Yunyun Yang ◽  
Xilei Cao ◽  
Xufu Cai
Keyword(s):  
Flame Retardant ◽  
Epoxy Resins ◽  
Synergistic Flame Retardant

Synergistic Flame Retardant Effect of Organic Boron Flame Retardant and Aluminum Hydroxide on Polyethylene

2021 ◽  
Vol 22 (2) ◽  
pp. 354-365
Author(s):  
Lianghui Ai ◽  
Shanshan Chen ◽  
Liu Yang ◽  
Ping Liu
Keyword(s):  
Flame Retardant ◽  
Aluminum Hydroxide ◽  
Synergistic Flame Retardant
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