Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 139, Issue 18, Pages -Publisher
WILEY
DOI: 10.1002/app.52087
Keywords
applications; degradation; molding; thermal properties
Categories
Funding
- Natural Science Foundation Joint program of the Shaanxi province [2020GY-297]
- Joint Fund of Advanced Aerospace Manufacturing Technology Research [U1837601]
- Key R&D Program and Key Industry Chain Project of Shaanxi Province [2019ZDLGY06-02-01]
- Undergraduate Innovation & Business Program in Northwestern Polytechnical University [S202110699180]
Ask authors/readers for more resources
By synthesizing and adding 3OH-POSS, the thermal stability and ablation resistance of BPR can be significantly improved, forming an ordered graphite structure and high-temperature ceramics on the ablation surface, thereby enhancing the material's resistance to ablation.
To further improve the anti-ablation property of boron phenolic resin (BPR), high-temperature resistant reactive trisilanolheptaphenyl POSS (3OH-POSS) was synthesized to modify BPR. The thermal stability of BPR was significantly improved. The initial decomposition temperature of the prepared 3OH-POSS modified BPR (POSSBPR) was increased from 226.0 to 390.2 degrees C and the chars at 800 and 1000 degrees C was increased from 71.1 and 66.7% to 75.1 and 73.7%, respectively with 20% 3OH-POSS addition. The prepared POSSBPR castings obtained linear ablation rate (LAR) and mass ablation rate (MAR) were as low as -0.122 mm/s and 0.0465 g/s. And the LAR and MAR of high silica fiber reinforced composites (HSC/POSSBPR) were 0.123 mm/s and 0.0602 g/s, respectively. Moreover, the mechanism of high-temperature carbon microcrystalline and ceramic structure transformation, and ablation performance enhancement of POSSBPR were determined by X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy. Results indicated that the introduction of 3OH-POSS promotes the formation of ordered graphite structure of BPR and forms high-temperature species, such as SiC ceramic, on the ablated surface, which subsequently improves the ablation resistance of the material.
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