Study on the Interface of Acetylene Silazane (SZ) Modified QF/PSA Composites

Abstract:

Due to the excellent thermo-stability, ablation resistance and superior dielectric properties, poly-silicon-containing arylacetylene resin (PSA) shows a promising application in aerospace and spaceflight industries as a composite matrix with quartz fiber (QF). However, the non-polar nature of PSA hamper the interfacial interaction with the QF resulting in a relatively weak mechanical strength for the whole QF/PSA composites. This can be alleviated by incorporating a coupling agent between QF and PSA to reinforce their interaction. Here, new coupling agents, three ethynyl silazane derivatives, were synthesized to improve QF/PSA composite mechanical properties and named as bis (3-ethynylaniline)-diphenylsilane (SZPP), bis (3-ethynylaniline)-methylphenylsilane (SZMP) and bis (3-ethynylaniline)-phenylvinylsilane (SZPV). For SZPP, about 3.0 wt% addition of this coupling agent increased the interlaminar shear strength and flexural strength of QF/PSA composite by 21.2% and 18.4%, respectively, compared with the untreated composite. Meanwhile, among the three coupling agents, SZPV showed the best improvement in enhancing the interlaminar shear strength and flexural strength of QF/PSA composites, which reached 34.1% and 41.7%, respectively.

• Periodical: Solid State Phenomena (Volume 298)
• Pages: 149-154
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.298.149
• Online since: October 2019
• Authors: Xiao Yi Zhou, Yan Zhou*, Shi Feng Deng
• Keywords: Composite, Coupling Agent, Mechanical Properties, Silazane, Silicon-Containing Arylacetylene Resin

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DOI: 10.1016/j.cej.2018.04.149

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DOI: 10.1002/polb.10359