Abstract In the work, polyhydromethylsiloxane (PHMS) was cross-linked with two vinylsilazanes: 1,1,3,3-tetramethyl-1,3-divinyldisilazane (ViSiNSiVi) or 1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetrasilazane ((ViSiN)4) in the presence of Karstedt’s catalyst. When the reactions were carried out in solvent-free conditions non-porous polysiloxane-silazane networks were obtained. The processes conducted in high internal phase emulsion (HIPE) resulted in macroporous materials. Their non-porous or porous morphology was established by SEM studies. They were also analyzed by elemental analysis, swelling measurements, FTIR and 29Si MAS-NMR spectroscopies and thermogravimetry coupled with mass spectrometry (TG/MS). Results showed that the non-porous networks contained high amounts of silazane moieties and were fairly hydrolytically stable. In contrast, contents of silazane units in most porous materials were low. Moreover, hydrolysis of Si H groups of PHMS followed by condensation of the resulting Si OH groups took place in HIPE conditions. This led to additional cross-linking of PHMS by siloxane bonds. During preparation of porous systems using ViSiNSiVi, hydrolysis of silazane bonds (Si N) also occurred. All the materials studied in the work contained reactive Si H groups and therefore exhibit a great potential for various applications. Presence of nitrogen atoms in their structure as well as porosity may be additional advantages.

中文翻译：

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聚氢甲基硅氧烷与硅氮烷化合物交联制备的无孔和多孔材料

摘要 在这项工作中，聚氢甲基硅氧烷 (PHMS) 与两种乙烯基硅氮烷交联：1,1,3,3-四甲基-1,3-二乙烯基二硅氮烷 (ViSiNSiVi) 或 1,3,5,7-四乙烯基-1,3， 5,7-四甲基环四硅氮烷 ((ViSiN)4) 在 Karstedt 催化剂存在下。当反应在无溶剂条件下进行时，获得了无孔聚硅氧烷-硅氮烷网络。在高内相乳液 (HIPE) 中进行的过程会产生大孔材料。它们的无孔或多孔形态是通过 SEM 研究确定的。它们还通过元素分析、溶胀测量、FTIR 和 29Si MAS-NMR 光谱以及热重分析与质谱联用 (TG/MS) 进行了分析。结果表明，无孔网络含有大量的硅氮烷部分，并且水解稳定。相比之下，大多数多孔材料中硅氮烷单元的含量较低。此外，在 HIPE 条件下，PHMS 的 Si H 基团水解，然后产生的 Si OH 基团缩合。这导致了 PHMS 通过硅氧烷键的额外交联。在使用 ViSiNSiVi 制备多孔系统的过程中，还发生了硅氮烷键 (Si N) 的水解。工作中研究的所有材料都含有反应性 Si H 基团，因此在各种应用中表现出巨大的潜力。在它们的结构中存在氮原子以及孔隙率可能是额外的优势。在使用 ViSiNSiVi 制备多孔系统的过程中，还发生了硅氮烷键 (Si N) 的水解。工作中研究的所有材料都含有反应性 Si H 基团，因此在各种应用中表现出巨大的潜力。在它们的结构中存在氮原子以及孔隙率可能是额外的优势。在使用 ViSiNSiVi 制备多孔系统的过程中，还发生了硅氮烷键 (Si N) 的水解。工作中研究的所有材料都含有反应性 Si H 基团，因此在各种应用中表现出巨大的潜力。在它们的结构中存在氮原子以及孔隙率可能是额外的优势。