The cover by Zhiwei Li and his team shows SEM images of flexible polyurethane foams (FPUFs) coated by the h-BN flame retardant coatings via layer-by-layer assembly method, which indicates that the thickness of h-BN coatings tends to become increasingly thick along with the increase in the dosages of the dispersions of h-BN nanosheets. Particularly, cone calorimetric test confirmed that h-BN coatings could effectively reduce the peak of heat release rate (50.1%) and CO production (53.8%) of FPUFs, respectively, showing excellent flame-retardant performance, mainly due to the physical barrier effect and "tortuous path" effect. 47787 Modified ethylene-propylene-diene elastomer (EPDM)-contained silicone rubber/ethylene-propylene-diene elastomer (EPDM) blends: Effect of composition and electron beam crosslinking on mechanical, heat shrinkability, electrical, and morphological properties C. ASHOKRAO FUKE, P. ANNA MAHANWAR AND S. RAY CHOWDHURY
Unsaturated polyester (UP) has many important industrial
applications,
including transportation, building materials, and electrical insulation.
However, UP resins are extremely flammable, thus restricting their
real-world applications. Herein, we report a mesoporous silica-based
ternary flame retardant (NF@SiO2-D) for UP by loading nickel
ferrite and dimethyl methylphosphonate (DMMP) via hierarchical assembly. NF@SiO2-D acts as a fire extinguisher
of UP through the combined effect of mesoporous silica, nickel ferrite,
and DMMP. The peak and total heat release rates of the UP matrix decreased
by 36.3% and 36.9%, respectively, after the incorporation of 10 phr
NF@SiO2-D. More importantly, when NF nanoparticles were
present, the smoke production of the UP matrix was reduced by 41.5%
compared to the control samples without NF nanoparticles. In addition,
20 phr of NF@SiO2-D enabled the UP to achieve a self-extinguishing
ability and a desired V-0 grade in the UL 94 test. The flame-retarding
UP composites with NF nanoparticles also exhibited better thermal
stability and T
g than the control samples.
The resultant fire-retardant UP composites are anticipated to find
more industrial applications.
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