Journal
POLYMERS
Volume 13, Issue 24, Pages -Publisher
MDPI
DOI: 10.3390/polym13244288
Keywords
thermosets; flame retardant; phosphate cellulose; thermal properties
Categories
Funding
- Young Scholars Development Fund of SWPU [201331010075]
- Sichuan Science and Technology Program [2021YFH0031]
- National Key Research and Development Program of China [2019YFE0120300]
Ask authors/readers for more resources
Phosphated cellulose (PCF) was successfully synthesized and applied in the preparation of polybenzoxazine (PBa) composites, increasing the char residue, reducing the peak heat release rate and total heat release, decreasing the smoke released, and enhancing the flame retardancy of the composites.
Phosphated cellulose (PCF) was synthesized based on urea, phosphated acid and cellulose. The structure of the PCF was confirmed by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy coupled with the Energy Dispersive Spectrometer (SEM-EDS). Benzoxazine (Ba)/PCF hybrid materials were fabricated and thermally cured to prepare polybenzoxazine composites (PBa/PCF). The effects of PCF on the curing temperature of Ba were analyzed through differential scanning calorimetry (DSC). The thermogravimetric (TGA) results demonstrated an increased char residue of 50% for the PBa composites incorporating PCF-5% compared with the pure PBa. The peak heat release rate (PHRR) and total heat release (THR) values of the PBa/PCF-5% composites clearly decreased by 58.1% and 16.5% compared to those of the pristine PBa. The smoke released from the PBa/PCF system significantly reduced with the loading of PCF. Moreover, the limited oxygen index (LOI) and vertical burning test level (UL-94) of PBa/PCF-5% reached up to 31 and V0. The flame retardant mechanism of the PCF in the PBa matrix was investigated TG-FTIR and char residues analysis. Finally, the dynamical mechanical analysis (DMA) results demonstrated that the Tg of the PBa/PCF composites was approximately 230 degrees C, which does not affect further applications of PBa composites.
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