Liu Weiming, Hang Guohua, Mei Honggang, Li Lei, Zheng Sixun
Department of Polymer Science and Engineering, The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China.
Polymers (Basel). 2022 Mar 25;14(7):1331. doi: 10.3390/polym14071331.
In this contribution, we reported the synthesis of a novel trifunctional POSS cyclic carbonate [POSS-3(5CC)]. With a difunctional five-member cyclic carbonate and a trifunctional polyetheramine as the precursor, the nanocomposites of polyhydroxyurethane (PHU) with POSS were synthesized. Transmission electron microscopy (TEM) showed that the nanocomposites of PHUs with POSS were microphase-separated; the spherical POSS microdomains via POSS-POSS interactions were generated with the size of 20~40 nm in diameter. After the introduction of POSS microdomains, the nanocomposites displayed improved thermal and mechanical properties. More importantly, the nanocomposites still displayed the reprocessing properties of vitrimers.
在本论文中，我们报道了一种新型三官能团POSS环状碳酸酯[POSS-3(5CC)]的合成。以双官能团五元环状碳酸酯和三官能团聚醚胺为前驱体，合成了含POSS的聚羟基聚氨酯（PHU）纳米复合材料。透射电子显微镜（TEM）表明，含POSS的PHU纳米复合材料发生了微相分离；通过POSS-POSS相互作用形成了直径为20~40 nm的球形POSS微区。引入POSS微区后，纳米复合材料的热性能和力学性能得到了改善。更重要的是，该纳米复合材料仍表现出热致液晶聚合物的再加工性能。
