Journal
POLYMERS
Volume 13, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/polym13060881
Keywords
ammonium polyphosphate; graphene; high-impact polystyrene; thermal stability; flame retardancy
Categories
Funding
- Natural Science Fund for Distinguished Young Scholars of Jiangsu Province of China [201901036]
- National Natural Science Fund of China [51974165]
Ask authors/readers for more resources
The surface-modified ammonium polyphosphate (APP@Si-171) exhibited better dispersion and reduced agglomeration tendencies compared to pure APP, and showed a significant synergistic flame-retardant effect with graphene in high-impact polystyrene (HIPS). The addition of flame retardants delayed the onset and peak temperatures in differential thermogravimetry curves, and weakened the peak heat release rate and total heat release.
Ammonium polyphosphate (APP) was modified with a silane coupling agent (vinyltrimethoxysilane, Si-171), and then the synergistic flame retarding effect of graphene and surface-modified APP (APP@Si-171) on high-impact polystyrene (HIPS) was investigated. Surface modification and thermal stability characterization of APP were analyzed by Fourier transform infrared spectroscopy (FTIR), energy dispersive spectrometer (EDS), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The results showed that surface-modified APP (APP@Si-171) exhibited significantly better dispersion and less agglomeration tendencies compared with pure APP. A series of target HIPS composites containing different mass fractions of the two flame retardants were prepared by melt blending. TGA and cone calorimeter tests (CCT) were conducted to quantitatively investigate the thermal and flammability properties of the composites, respectively. Results from TGA and CCT demonstrated that the addition of the flame retardants delayed the onset and peak temperatures in differential thermogravimetry (DTG) curves and weakened the peak heat release rate (PHRR) and total heat release (THR). Moreover, the synergistic effect index (SE) was employed to quantify the synergistic behavior between the two fillers, and the results showed that APP@Si-171 and graphene had a synergistic effect on improving the thermal stability and flame retardancy of HIPS.
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