PEO-based non-isocyanate polyhydroxyurethane (NIPU, PHU) networks physically modified with octa(3-hydroxy-3-methylbutyldimethylsiloxy)POSS (8OHPOSS) were synthesized via one-pot one-step approach. POSS was introduced into the polymer matrix in the amount of 1–10 wt%. Polar hydroxyls on the vertex groups of POSS allowed for uniform dispersion even up to high loadings (10 wt%). Composites exhibit enhanced thermal stability in comparison to the pristine matrix. FTIR analysis confirmed that POSS strengthens the hydrogen bonding in the material. Upon POSS introduction, plasticization was observed with a peculiar trend change at POSS loadings over 5 wt%. Glass transition temperature of highly crystalline 8OHPOSS was measured and reported to be at around 3 °C. NIPUs at hand exhibit high water absorption (around 200 wt%) typical for hydrogels. Swelling studies show that 8OHPOSS enhances PHUs hydrogels absorption capacity in phosphate-buffered saline (PBS). Higher absorption capacity in PBS solution in comparison to distilled water is an uncommon phenomenon in hydrogels.

通过一锅一步法合成了用八(3-羟基-3-甲基丁基二甲基硅氧基)POSS (8OHPOSS) 物理改性的基于 PEO 的非异氰酸酯多羟基聚氨酯 (NIPU, PHU) 网络。POSS 以 1-10 wt% 的量引入到聚合物基体中。POSS 顶点基团上的极性羟基即使在高负载量 (10 wt%) 下也能实现均匀分散。与原始基体相比，复合材料表现出增强的热稳定性。FTIR 分析证实 POSS 增强了材料中的氢键。引入 POSS 后，在 POSS 负载量超过 5 wt% 时，观察到塑化现象出现了特殊的趋势变化。测量高度结晶的 8OHPOSS 的玻璃化转变温度并报告约为 3 °C。现有的 NIPU 表现出水凝胶典型的高吸水率（约 200 wt%）。溶胀研究表明，8OHPOSS 增强了 PHU 水凝胶在磷酸盐缓冲盐水 (PBS) 中的吸收能力。与蒸馏水相比，PBS 溶液具有更高的吸收能力，这是水凝胶中不常见的现象。