Abstract
New crosslinked polycarbosilanes (PCSs) having biphenyl, biphenyl ether and naphthalene linkages, were synthesized by hydrosilylation reaction between multi-functional vinylsilanes and hydrosilanes. The PCSs were transparent rigid material without cracks or bubbles. The mechanical properties and glass transition temperatures (Tgs) of the PCSs were evaluated by flexural tests and differential scanning calorimeter (DSC) or dynamic mechanical analysis (DMA). Crosslinked PCSs VIII-X with high network chain density and rigid-rod spacers had Tgs at around 250°C and high flexural strength in the range of 75-96MPa. 5% weight loss temperatures of PCSs under nitrogen ranged from 490°C to 544°C
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Tsumura, M., Iwahara, T. Crosslinked Polycarbosilanes. Synthesis and Properties. Polym J 32, 567–573 (2000). https://doi.org/10.1295/polymj.32.567
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DOI: https://doi.org/10.1295/polymj.32.567