Synergistic Flame‐Retardant Effect of an Aryl Boronic Acid Compound and Ammonium Polyphosphate on Epoxy Resins

2019 ◽  
Vol 4 (33) ◽  
pp. 9677-9682
Author(s):  
Shanshan Chen ◽  
Lianghui Ai ◽  
Jinming Zeng ◽  
Ping Liu
2017 ◽  
Vol 132 (1) ◽  
pp. 483-491 ◽  
Author(s):  
Hang Luo ◽  
Feng Zhou ◽  
Yunyun Yang ◽  
Xilei Cao ◽  
Xufu Cai

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3221
Author(s):  
Feiyue Wang ◽  
Jiahao Liao ◽  
Long Yan ◽  
Hui Liu

A novel diaminodiphenylmethane (DDM) modified ammonium polyphosphate (APP) flame retardant, DDP, was successfully synthesized via ion-exchange reaction. DDP was introduced into epoxy resins (EPs) to reduce flammability. A comparable level of DDP exerts better flame-retardant and smoke suppression efficiencies in EP than APP. An EP blend containing 15 wt% DDP displays a limiting oxygen index (LOI) value of 37.1% and a UL 94 V-0 rating, and further exhibits a 32.3% reduction in total heat release and a 48.0% reduction in total smoke production compared with pure EP. The presence of DDP greatly facilitates char formation during combustion, and the char mass from thermal decomposition of an EP blend is 37.8% smaller than that of an EP blend containing 15 wt% DDP at 800 °C. The incorporation of DDP into EP blends has a smaller impact on the glass transition temperature and tensile strength than those of a comparable level of APP. This reflects the better compatibility of DDP with the EP matrix compared with that for APP.


2019 ◽  
Vol 138 (2) ◽  
pp. 1259-1267
Author(s):  
Qingyi Song ◽  
Hongjuan Wu ◽  
Hao Liu ◽  
Xiaoxia Han ◽  
Hongqiang Qu ◽  
...  

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