Phosphazene derivative cross-linked liquid silicone rubber and its mechanical and thermal properties

Shen, Shuai; Xin, Yi; Niu, Zhaoqi; Ma, Xutao; Zhang, Junan; Hou, Xiao; Ma, Xiaoyan

doi:10.1016/j.polymdegradstab.2022.110086

Cited by 13 publications

(4 citation statements)

References 33 publications

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“…Generally speaking, the lower the linear ablation rate (LAR) and the mass ablation rate (MAR), the better the ablation resistance of the material . As shown in Figure f, the high LAR of pure PDMS indicated poor ablation resistance.…”

Section: Results and Discussionmentioning

confidence: 95%

“…Generally speaking, the lower the linear ablation rate (LAR) and the mass ablation rate (MAR), the better the ablation resistance of the material. 39 As shown in Figure 7f, the high LAR of pure PDMS indicated poor ablation resistance. This was because the char layer produced in the ablation process of pure PDMS was loose and fragile, which was easily stripped away by the high-temperature gas flow.…”

Section: Mechanical and Adhesivementioning

confidence: 89%

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Improved Mechanical and Ablative Properties of PDMS Coatings Incorporating Epoxy as a Suspended Chain

Wang,

Cai,

Ling

et al. 2023

Ind. Eng. Chem. Res.

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Flexible thermal protection materials with excellent mechanical and ablative properties were one of the key components in promoting the development of a new generation of aircraft. In the present work, a robust, strongly adhesive, and ablation-resistant PDMS coating was prepared through the covalent connection between PDMS and vinyl-functionalized epoxy resin (EAP) by hydrosilylation. The EAP synthesized by molecular design was uniformly dispersed in the PDMS matrix as an island phase-separation structure. The tensile strength, elongation at break, and shear strength of EAP-modified PDMS (EAP@PDMS) were significantly increased by 575%, 155%, and 183%, respectively, when compared with pure PDMS. Besides, the linear ablation rate (LAR) of EAP@PDMS was greatly declined, which was 80.1% lower than that of pure PDMS, exhibiting excellent ablation resistance. This work opened an avenue toward developing flexible thermal protection coatings with excellent mechanical and ablative properties for aerospace applications.

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Section: Results and Discussionmentioning

confidence: 95%

Section: Mechanical and Adhesivementioning

confidence: 89%

Improved Mechanical and Ablative Properties of PDMS Coatings Incorporating Epoxy as a Suspended Chain

Wang,

Cai,

Ling

et al. 2023

Ind. Eng. Chem. Res.

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show abstract

“…It can be found from the XRD patterns that the diffraction peaks corresponding to SiC appeared in the charred layer of either PBPP (AF/PIP) or PFBAP (AF/PIP) (Figure a). The peaks at 284.48 eV in the C 1s spectra and the peaks at 101.94 eV in the Si 2p spectra indicate the presence of Si–C, corresponding to the formation of SiC . SiC has good thermal and chemical stabilities and enhances the ablation resistance of the insulation material.…”

Section: Resultsmentioning

confidence: 99%

“…peaks at 284.48 eV in the C 1s spectra and the peaks at 101.94 eV in the Si 2p spectra indicate the presence of Si−C, corresponding to the formation of SiC 46. SiC has good thermal and chemical stabilities and enhances the ablation resistance of the insulation material.…”

mentioning

confidence: 99%

Effects of Fluorinated Side Groups on the Insulation Performances of Polyphosphazenes with Organic Fiber Reinforcement

Zheng,

Wang,

Liu

et al. 2024

ACS Appl. Polym. Mater.

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Poly(diaryloxy)phosphazene (PDAP) possesses good ablative resistance properties, owing to unique charred layers formed during ablation, showing promising applications in aerospace thermal protection. However, the high glass-transition temperature (T g ) of PDAP insulations limits the application in elastomeric heat-shielding materials (EHSMs) that is a need for meeting the growing requirements of solid rocket motors such as low-temperature storage and application. In this work, we focused on improving the low-temperature resistance and ablation resistance of polyphosphazene composites. A class of ablativeresistant poly(octafluoropentyloxy/butoxy/aryloxy)phosphazene (PFBAP) with low T g was prepared by introducing flexible octafluoropentyloxy side groups into poly(butoxy/aryloxy)phosphazene (PBPP). The results showed that the octafluoropentyloxy side groups could improve the thermal oxidative stability, flame retardancy, and interfacial interaction of polyphosphazene. Compared with PBPP composites, the values of linear ablation rate, mass ablation rate, and charring ablation rate of PFBAP 2 (containing 11.86% octafluoropentyloxy side groups) composites were reduced by 65, 34, and 25%, respectively. The study on the ablation mechanism of PFBAP composites shows that the introduction of fluorinated side groups can not only improve the charring degree of insulations during ablation but also exert a flame-retardant effect in the gaseous phase, resulting in a denser and more coherent charred layer. This work demonstrates a way to develop lowtemperature and ablation-resistant polyphosphazene materials for potential thermal protection in the aerospace industry.

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Zirconium chelated hybrid phenolic resin with enhanced thermal and ablation resistance properties for thermal insulation composites

Niu

Chen

Shen

et al. 2022

Composites Communications

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Phosphazene derivative cross-linked liquid silicone rubber and its mechanical and thermal properties

Cited by 13 publications

References 33 publications

Improved Mechanical and Ablative Properties of PDMS Coatings Incorporating Epoxy as a Suspended Chain

Improved Mechanical and Ablative Properties of PDMS Coatings Incorporating Epoxy as a Suspended Chain

Effects of Fluorinated Side Groups on the Insulation Performances of Polyphosphazenes with Organic Fiber Reinforcement

Zirconium chelated hybrid phenolic resin with enhanced thermal and ablation resistance properties for thermal insulation composites

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