Journal
POLYMERS
Volume 11, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/polym11010168
Keywords
polyurethane foam; expandable graphite; mechanical property; flame retardancy
Categories
Funding
- Spanish Ministry of Economy and Competitiveness (MINECO)
- FEDER Program [NEOADFOAM/RTC-2015-3340-3]
- FEDER Program (Ramon y Cajal fellowship) [RYC-2012-10737]
Ask authors/readers for more resources
Three types of expandable graphite (EG) differing in particle size and expansion volume, are compared as flame retardant additives to rigid polyurethane foams (RPUFs). In this paper we discuss microstructure, thermal stability, fire behavior, and compression performance. We find that ell size distributions were less homogeneous and cell size was reduced. Furthermore, thermal conductivity increased along with EG loading. Thermogravimetric analysis (TGA) showed that EG only increased residue yield differently. The results indicate that a higher expansion of EG increased the limiting oxygen index (LOI) value, whereas a bigger particle size EG improved the rating of the vertical burning test (UL94). Results from the cone calorimeter test showed that a bigger particle size EG effectively reduced peak of heat release rate (pHRR). Furthermore, a higher expansion, led to a decrease in smoke production (TSP). The combination of both characteristics gives extraordinary results. The physical-mechanical characterization of the EG/RPUF foams revealed that their compression performance decreased slightly, mostly due to the effect of a bigger size EG.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available