Investigation of the thermal degradation kinetics of ceramifiable silicone rubber-based composite

Zhao, Dong; Liu, Tianming; Xu, Yaozong; Zhang, Jun; Shen, Yucai; Wang, Tingwei

doi:10.1007/s10973-023-12138-9

Cited by 10 publications

(2 citation statements)

References 37 publications

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“…With the continuous exploration of the Earth and extraterrestrial space, human beings are exposed to increasingly extreme environments, among which ultralow temperature conditions are one of the main challenges. − Silicone elastomers, characterized by exceptional resistance to high and low temperatures, − radiation, , and ultraviolet light, , as well as insulation, − air permeability, , and physiological inertness − properties, find widespread application in various fields, including electronic/electrical, aerospace, petrochemical, construction, transportation, and daily chemical industries. Notably, ethyl silicone rubber has attracted increasing attention as the elastomer material with the lowest known glass transition temperature. , Derived from the cross-linking of linear polydiethylsiloxane (PDES), with −Si–O–Si– as the main chain and –CH 2 CH 3 as the side group, ethyl silicone rubber exhibits a glass transition temperature of −145 °C.…”

Section: Introductionmentioning

confidence: 99%

Ternary Siloxane Copolymers Based Tough Elastomer under Ultralow Temperatures Condition

Ji,

Huang,

Dai

et al. 2024

ACS Appl. Polym. Mater.

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The preparation of tough elastomer materials for use in ultralow temperature environments (<−100 °C) has always been a challenge in materials science. Despite polydiethylsiloxane being recognized as a promising material, its crystallization at low temperatures (−75 °C) significantly limits its application under ultralow temperature conditions. In this study, we used simulation-assisted design to optimize a ternary random copolymerized silicone with a glass transition temperature of −149 °C, which is a potential candidate material to withstand ultralow temperature environments. We experimentally synthesized diethyl−dimethyl−diphenyl ternary random copolysiloxanes based on the insights obtained from molecular dynamics simulations. Differential scanning calorimetry experiments confirmed that the glass transition temperature of the ternary random copolymerized silicone was as low as −140 °C, and the crystallization was effectively suppressed. Low-temperature tensile experiments further showed that the elongation at break exceeded 200% at −110 °C, the toughness reached 27 MJ/m 3 , and the fracture energy reached 590 kJ/m 2 . At the ultralow temperature of −130 °C, the fracture energy of the material reached 650 kJ/m 2 , and the tear strength reached 52 kN/m, demonstrating exceptional tear resistance. This study provides a feasible solution for the preparation and engineering applications of elastomer materials resistant to ultralow temperatures.

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Section: Introductionmentioning

confidence: 99%

Ternary Siloxane Copolymers Based Tough Elastomer under Ultralow Temperatures Condition

Ji,

Huang,

Dai

et al. 2024

ACS Appl. Polym. Mater.

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“…The ceramic materials sintered at high temperature are mostly prepared by precursor of silicon‐containing chemical substance 11–13 and silicone rubber 14–16 . Silicone rubber contains silicon and oxygen.…”

Section: Introductionmentioning

confidence: 99%

Sintering behavior of ceramic ethylene‐propylene‐diene rubber/pyrophyllite/zinc borate composites

He,

Ji,

Chen

et al. 2023

Polymers for Advanced Techs

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Ceramic polymer materials have great future applications in the field of fireproof materials. However, ceramic polyolefins have shortcomings such as few available inorganic fillers, high sintering temperature, and low flexural strength. Therefore, achieving rapid sintering of ceramic ethylene‐propylene‐diene rubber (EPDM) is an urgent problem that needs to be solved. Herein, we prepared ceramic EPDM materials using pyrophyllite as aggregate and zinc borate as flux. The materials were prepared using a mixer and sintered in a muffle furnace at 850 and 1000°C. The flexural strength of the sinter residue was tested by a material testing machine. The microstructure changes during the ceramification process were characterized using scanning electron microscopy (SEM), thermogravimetric analysis (TG), derivative thermogravimetric analysis (DTG), differential thermal analysis (DTA), and x‐ray diffraction (XRD). The results indicated that the EPDM filled with pyrophyllite and zinc borate had a flexural strength of 2.6 MPa after sintering at 850°C. After sintering at 1000°C, its flexural strength further increased up to 12.3 MPa. The SEM results indicated that as the temperature increased, the zinc borate melted and filled in the space among pyrophyllite particles, and the zinc borate and the pyrophyllite were sintered into a dense whole. The TG, DTG and DTA testing results indicated that the melting and decomposition behaviors of the pyrophyllite‐zinc borate mixture changed compared with pure pyrophyllite and zinc borate. The XRD results indicated that during the sintering process, the crystalline structure of the zinc borate and the pyrophyllite gradually transformed into a quartz‐based crystalline structure. It is promising that the ceramic polyolefin materials are prepared by the pyrophyllite/zinc borate combination.

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Study on thermal stability of water-based polyurethanes derived from hydroxypropyl terminated poly(dimethylsiloxane)

Džunuzović,

Stefanović,

Džunuzović

et al. 2024

J Polym Res

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Investigation of the thermal degradation kinetics of ceramifiable silicone rubber-based composite

Cited by 10 publications

References 37 publications

Ternary Siloxane Copolymers Based Tough Elastomer under Ultralow Temperatures Condition

Ternary Siloxane Copolymers Based Tough Elastomer under Ultralow Temperatures Condition

Sintering behavior of ceramic ethylene‐propylene‐diene rubber/pyrophyllite/zinc borate composites

Study on thermal stability of water-based polyurethanes derived from hydroxypropyl terminated poly(dimethylsiloxane)

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