Hydrogen-terminated silicon nanoparticles (H–SiNPs) inhibit anerobic thermal autopolymerization of methacrylates. When heated to 100 °C under an inert atmosphere, allyl methacrylate (AMA) was stable for at least 95 h in the presence of 1.2 wt % H–SiNPs, exhibiting less than 0.15% conversion, whereas the neat monomer solidified within 24 h (over 10% conversion after 34 h). A mechanism is proposed that is based on H-transfer from SiNPs to the thermally activated methacrylic dimer biradical, quenching autopolymerization. An analysis of SiNPs isolated after heating in AMA reveals the grafting of ester groups. Thermal hydrosilylation offers a facile way to attach an allyl group to the surface of SiNPs.

中文翻译：

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Si-H 表面基团抑制甲基丙烯酸聚合：甲基丙烯酸烯丙酯与硅纳米颗粒的热氢化硅烷化

端氢硅纳米粒子 (H-SiNPs) 抑制甲基丙烯酸酯的厌氧热自聚合。当在惰性气氛下加热至 100 °C 时，甲基丙烯酸烯丙酯 (AMA) 在 1.2 wt% H-SiNPs 存在下至少稳定 95 小时，转化率低于 0.15%，而纯单体在 24 小时内固化。 34 小时后转化率超过 10%）。提出了一种机制，该机制基于从 SiNPs 到热活化的甲基丙烯酸二聚体双自由基的 H 转移，猝灭自聚合。在 AMA 中加热后分离的 SiNP 的分析揭示了酯基团的接枝。热氢化硅烷化提供了一种将烯丙基连接到 SiNPs 表面的简便方法。