Enhanced thermal and anti‐ablation properties of high‐temperature resistant reactive <scp>POSS</scp> modified boron phenolic resin

Niu, Zhaoqi; Li, Gang; Xin, Yi; Ma, Xiaoyan; Zhang, Chengshuang; Hou, Xiao

doi:10.1002/app.52087

Cited by 19 publications

(7 citation statements)

References 35 publications

(29 reference statements)

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“…The lower the I D /I G value, the less disorder and defect there is; conversely, the more disorder and defect there is. 39,40 As can be seen in Figure 9, the I D :I G value of EP/7-KDC is 0.82 less than that of neat EP, which indicates the enhanced graphitization of the carbon. 41 This is because KDC has the property of catalytic carbonization, which makes it form a tight block layer of carbon during thermal decomposition and evaporation, and thus has good flame retardancy.…”

Section: Flame Retardant Mechanism Analysismentioning

confidence: 88%

In‐situ formation of macromolecule P/N/Si flame retardant for epoxy resin with low smoke toxicity and excellent flame‐retardancy

Liu

Zheng

et al. 2023

J of Applied Polymer Sci

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Epoxy resins (EP) have great chemical and physical properties, but their poor flame retardant properties have prevented their widespread use. To improve the flame retardancy properties of EP, an active P/N/Si flame retardant (KDC) containing a double bond was successfully synthesized in this work by using a typical aldehyde amine condensation reaction. This flame retardant not only can form a large molecule flame retardant in situ by double bond reaction and increase the tightness with EP matrix, but also has the advantage of P/N/Si three elements synergistic flame retardant, and at the same time play the flame retardant performance of each element, can achieve excellent flame retardant performance and low smoke and toxicity with low addition amount. Subsequently, the performance of the flame retardants was tested. When 7 wt% of KDC was added, the pHRR and TSR of the EP composites were reduced by 51.7% and 29.8%, respectively. More importantly, the addition of KDC inhibited the release of toxic fuels and smoke from EP, where the TSP values of EP/3-KDC were 18.14% below those of neat EP and increased the residual amount of charcoal, while the inhibition of CO and CO 2 release was particularly pronounced with the presence of KDC.

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Section: Flame Retardant Mechanism Analysismentioning

confidence: 88%

In‐situ formation of macromolecule P/N/Si flame retardant for epoxy resin with low smoke toxicity and excellent flame‐retardancy

Liu

Zheng

et al. 2023

J of Applied Polymer Sci

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“…At higher conversions and activation energies however, the char forming is due to the inorganic part of POSS nanoparticles and formation of hightemperature species. 55 However, the E a values related to 3 and 5 wt% nanoparticles were lower than that related to the sample containing 1 wt% POSS nanofiller, demonstrating lower compatibility and dispersion of nanoparticles at this POSS loading. The activation energy results obtained from FWO model for neat PBZ resin and samples containing 1, 3, and 5 wt% POSS content are presented in Figure 7.…”

Section: à2mentioning

confidence: 72%

Thermal stability and decomposition kinetics of polybenzoxazine and oligomeric polyhedral octaphenyl silsesquioxane nanocomposites

Faghihi,

Azar,

Khonakdar

et al. 2024

Polymers for Advanced Techs

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In this study, the impact of octaphenyl polyhedral oligomeric silsesquioxane (POSS) on the thermal stability of polybenzoxazine resin at 1, 3, and 5 wt% POSS loading through dynamic thermogravimetric analysis (TGA) at heating rates of 10, 20, 30 and 40°C min−1 was investigated. Besides, the decomposition kinetics of polybenzoxazine resin (PBZ) and various nanocomposites were studied using Kissinger, Friedman, Flynn‐Wall‐Ozawa (FWO) and Coats‐Redfern (CR) models and also, the activation energies of samples were calculated. At first, benzoxazine monomer was synthesized and then nanocomposites were prepared via solution mixing method. The qualitative dispersion of nanoparticles in benzoxazine resin was examined through the utilization of scanning electron microscopy and x‐ray diffraction experiments. The results showed that the addition of nanoparticles improved the thermal stability of PBZ resin specially at 1 wt% POSS loading and at higher POSS content the thermal stability of the resin decreased. As determined by TGA, the char yield of resin was enhanced by 2.6% upon the addition of 1 wt% nanoparticles. In addition, in 1 weight percent of nanoparticles, as the heating rate rose from 10 to 40°C min−1, the Integral Program Decomposition Temperature (IPDT) has increased by about 260°C, and this increase is about 183°C compared to the resin, and also elevating the heating rate, Td (5%) and Td (10%) weight loss of samples shifted to higher temperatures. The degradation mechanism of the resin and nanocomposites was evaluated through Kissinger, Friedman, FWO and CR models. The results displayed that the addition of 1 wt% nanoparticles increased the activation energy (Ea) values of the nanocomposites compared to that of neat resin and above this filler content, the Ea values decreased. The findings derived from the FWO model indicated that the inclusion of a 1 wt% filler raised the Ea values of the first and second stages of PBZ resin decomposition from 136–200 and 151–214 kJ mol−1 to 148–210 and 180–228 kJ mol−1, respectively.

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“…As an advanced thermal protection material, aerogel's thermal insulation and ablative resistance performances are of vital importance [23][24][25][26]. Specifically, thermal stability is a significant factor for ablative resistance [27][28][29][30][31].…”

Section: Thermal Stability Mechanical Property and Thermal Insulation...mentioning

confidence: 99%

Multifunctional Integrated Organic–Inorganic-Metal Hybrid Aerogel for Excellent Thermal Insulation and Electromagnetic Shielding Performance

Niu,

Qu,

Chen

et al. 2024

Nano-Micro Lett.

Self Cite

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Vehicles operating in space need to withstand extreme thermal and electromagnetic environments in light of the burgeoning of space science and technology. It is imperatively desired to high insulation materials with lightweight and extensive mechanical properties. Herein, a boron–silica–tantalum ternary hybrid phenolic aerogel (BSiTa-PA) with exceptional thermal stability, extensive mechanical strength, low thermal conductivity (49.6 mW m−1 K−1), and heightened ablative resistance is prepared by an expeditious method. After extremely thermal erosion, the obtained carbon aerogel demonstrates noteworthy electromagnetic interference (EMI) shielding performance with an efficiency of 31.6 dB, accompanied by notable loading property with specific modulus of 272.8 kN·m kg−1. This novel design concept has laid the foundation for the development of insulation materials in more complex extreme environments."Image missing"

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Enhanced thermal and anti‐ablation properties of high‐temperature resistant reactive POSS modified boron phenolic resin

Cited by 19 publications

References 35 publications

In‐situ formation of macromolecule P/N/Si flame retardant for epoxy resin with low smoke toxicity and excellent flame‐retardancy

In‐situ formation of macromolecule P/N/Si flame retardant for epoxy resin with low smoke toxicity and excellent flame‐retardancy

Thermal stability and decomposition kinetics of polybenzoxazine and oligomeric polyhedral octaphenyl silsesquioxane nanocomposites

Multifunctional Integrated Organic–Inorganic-Metal Hybrid Aerogel for Excellent Thermal Insulation and Electromagnetic Shielding Performance

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