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首页> 外文期刊>Polymers for advanced technologies >Synthesis of mesoporous silica and its modification of bismaleimide/cyanate ester resin with improved thermal and dielectric properties
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Synthesis of mesoporous silica and its modification of bismaleimide/cyanate ester resin with improved thermal and dielectric properties

机译：具有改善的热和介电性能的介孔二氧化硅的合成及其对双马来酰亚胺/氰酸酯树脂的改性

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摘要

A novel method is proposed to synthesize new mesoporous silica containing amine groups (MPSA), and it was further employed to modify bismaleimide-dialllyl bisphenol (BD)/cyanate ester (CE) resin to form novel MPSA/BD/CE hybrids; in addition, the typical properties of MPSA/BD/CE were systematically investigated. Results show that these hybrids have very low dielectric constant and loss as well as good thermal properties. Compared with BD/CE resin, all hybrids have not only decreased dielectric constant and loss but also similar dependence of dielectric properties on frequency over the whole frequency from 10 to 106 Hz. Specifically, with the addition of MPSA to BD/CE resin, the dielectric constant reduces from 3.5 to 3.0, and the dielectric loss is only 85% of that of BD/CE resin. Note that all hybrids show better thermal resistance (reflected by higher glass transition temperature, decreased maximum degradation rate, and higher char yield at 800℃) than BD/CE resin. All these differences in macro-properties are attributed to the different structure between MPSA/BD/CE hybrids and BD/CE resin.
机译：提出了一种新的方法来合成新的含胺基介孔二氧化硅（MPSA），并进一步用于修饰双马来酰亚胺-二烯丙基双酚（BD）/氰酸酯（CE）树脂，以形成新型MPSA / BD / CE杂化体。此外，还对MPSA / BD / CE的典型特性进行了系统研究。结果表明，这些杂化体具有非常低的介电常数和损耗以及良好的热性能。与BD / CE树脂相比，所有混合材料不仅降低了介电常数和损耗，而且在10至106 Hz的整个频率上，介电特性对频率的依赖性也相似。具体地，在BD / CE树脂中添加MPSA，介电常数从3.5降低至3.0，并且介电损耗仅为BD / CE树脂的85％。请注意，所有杂化物均具有比BD / CE树脂更好的耐热性（反映出更高的玻璃化转变温度，降低的最大降解速率和800℃时更高的炭收率）。宏观性能的所有这些差异归因于MPSA / BD / CE杂化物与BD / CE树脂之间的结构不同。

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