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首页> 外文期刊>Journal of Materials Science >Novel high performance functionalized ladderlike polyphenylsilsesquioxane/ bismaleimide hybrids with very good flame retardancy, thermal, and dimensional stability
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Novel high performance functionalized ladderlike polyphenylsilsesquioxane/ bismaleimide hybrids with very good flame retardancy, thermal, and dimensional stability

机译：新型高性能功能化梯状聚苯基倍半硅氧烷/双马来酰亚胺杂化物，具有出色的阻燃性，热稳定性和尺寸稳定性

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Novel high performance hybrids (N-PPSQ/BDM/DBA) with very good flame retardancy, thermal, and dimensional stability as well as low dielectric constant and loss were developed, which consist of 4,4′- bismaleimidodiphenyl methane/2,2′-diallyl bisphenol A (BDM/DBA) resin and a novel functionalized ladderlike polyphenylsilsesquioxane (N-PPSQ). N-PPSQ was synthesized through the hydrolysis and condensation between phenyltrimethoxysilane and γ-aminopropyl triethoxysilane, and its structure was characterized by X-ray diffraction, nuclear magnetic resonance, gel permeation chromatography, and Fourier transform infrared. Compared with BDM/DBA resin, N-PPSQ/BDM/DBA hybrids show significantly improved integrated performances including remarkably reduced dielectric constant and loss, significantly improved flame retardancy, thermal, and dimensional stability, showing great potential for applications having harsh requirements in integrated performances. For example, in the case of the hybrid with 15 wt% N-PPSQ, its coefficient of thermal expansion in glassy and rubbery state are only about 49 and 42% of that of BDM/DBA resin, respectively; its limiting oxygen index increases from about 26.1-42.1%; while its dielectric loss is only about 87% of that of BDM/DBA resin at 1 kHz. These attractive improved properties are attributed to the variety in the cross-linked structure induced by the presence of N-PPSQ.
机译：开发了新型的高性能混合动力车（N-PPSQ / BDM / DBA），具有很好的阻燃性，热稳定性和尺寸稳定性，介电常数和损耗低，由4,4'-双马来酰亚胺二苯基甲烷/ 2,2'组成-二烯丙基双酚A（BDM / DBA）树脂和新型功能化梯形聚苯基倍半硅氧烷（N-PPSQ）。 N-PPSQ是通过苯基三甲氧基硅烷与γ-氨基丙基三乙氧基硅烷的水解和缩合反应合成的，其结构通过X射线衍射，核磁共振，凝胶渗透色谱和傅里叶变换红外光谱进行表征。与BDM / DBA树脂相比，N-PPSQ / BDM / DBA杂化物显示出显着改善的综合性能，包括显着降低的介电常数和损耗，显着改善的阻燃性，热稳定性和尺寸稳定性，显示出对综合性能有苛刻要求的应用的巨大潜力。例如，对于具有15 wt％N-PPSQ的杂化物，其在玻璃态和橡胶态的热膨胀系数分别仅为BDM / DBA树脂的49％和42％。其极限氧指数从约26.1-42.1％增加;而在1 kHz时的介电损耗仅为BDM / DBA树脂的介电损耗的87％左右。这些引人注目的改进性质归因于由于存在N-PPSQ而引起的交联结构的多样性。

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