Rapid Curing of Liquid Polycarbosilane and Its Conversion into Protective Coating

Gong, Jian; Wang, Yuanjie; Zhou, Mingjiong; Pei, Xueliang; Huang, J.; Huang, Zhengren; Huang, Qing

doi:10.1007/s12633-023-02481-9

Cited by 5 publications

(1 citation statement)

References 32 publications

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“…Curing is primarily aimed at forming a cross‐linked network, reducing the volatilization of small molecules and oligomers. Effective curing can significantly enhance the weight retention rate of curing and the high‐temperature ceramic yield of VHPCS 7 . Curing reactions for VHPCS are more commonly conducted in an inert atmosphere, using the thermal crosslinking method that eliminates interference from oxygen and avoids introducing impurities 8,9 .…”

Section: Introductionmentioning

confidence: 99%

A novel high reactive initiator system of vinyl‐substituted hydridopolycarbosilane (VHPCS) for lower curing temperature and higher ceramic yields

Ma,

Cao,

Guo

et al. 2024

J of Applied Polymer Sci

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Vinyl‐substituted hydridopolycarbosilane (VHPCS) is widely studied for its low viscosity, abundance of active functional groups, rapid curing, and high ceramic yield. The curing reactions mainly involve the free radical polymerization of vinyl and hydrosilylation reactions, but these reactions typically require high temperatures such as 160–250°C. The curing behavior of VHPCS‐17 with a tert‐butyl peroxybenzoate/Nickel acetylacetonate (TBPB/NIAA) system is investigated using differential scanning calorimetry and in situ Fourier transform infrared. The properties of VHPCS‐17 with different initiator systems and VHPCS with different vinyl contents (under TBPB/NIAA system) are studied using thermogravimetric analysis and x‐ray diffraction. The results demonstrate that the TBPB/NIAA system can facilitate the free radical polymerization of vinyl; moreover, this system decreases the peak temperature of the curing reaction from 251 to 141°C and increases the ceramic yield from 80.49% to 89.88%. The ceramic yield of cured VHPCS increases gradually, reaching 89.88% when the vinyl content is 17%. The grain size of β‐SiC decreases continuously with the increase in vinyl content, while the high‐temperature oxidation‐resistant properties of SiC ceramics obtained from different VHPCSs are not negatively affected.

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Section: Introductionmentioning

confidence: 99%