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基于七异丁基-胺丙基-多面体低聚倍半硅氧烷(POSS-NH2)与溴丁烯或溴代十一烯反应,一步法合成了含POSS侧基的两种杂化二烯烃.以钌卡宾络合物为催化剂的非环二烯烃易位(ADMET)聚合,短链二烯烃未能发生,而长链二烯烃能顺利实现.将杂化二烯烃转变为离子型杂化二烯烃,其ADMET聚合活性较高,随着反应时间延长,聚合物分子量明显增大,分子量分布变窄,体现了逐步聚合的特征.核磁共振分析揭示了聚合物的不饱和结构和聚合反应的变化过程.主链不饱和的无定形聚合物,经氢化作用转变为饱和的离子型杂化聚乙烯,POSS基团精确地连接在聚乙烯骨架的侧位上,且POSS基团和聚乙烯骨架均表现出较强的结晶能力.这种离子型杂化聚乙烯具有球形的单分子或聚集形态,可直接构筑纳米尺度的聚合物材料.
Based on the reaction of heptabutyl-aminopropyl-polyhedral oligomeric silsesquioxane (POSS-NH2) with bromobutene or bromoundecene, two kinds of hybrid diolefin containing POSS side groups were synthesized in one step .Using ruthenium carbene complex as a catalyst for the polymerization of acyclic diene translocation (ADMET), the short chain diolefin failed to occur and the long chain diolefin could be successfully realized.The hybrid diolefin was converted into ionic hybrid di Olefin, ADMET polymerization activity is higher, with the extension of reaction time, the molecular weight of the polymer is obviously increased, the molecular weight distribution is narrower, which shows the characteristic of gradual polymerization. NMR analysis reveals the change of the unsaturated structure and the polymerization reaction of the polymer Process. Unsaturated, backbone amorphous polymers are converted to saturated ionic hybrid polyethenes by hydrogenation. The POSS groups are precisely attached to the side of the polyethylene backbone and both the POSS groups and the polyethylene backbone Showing a strong crystallization ability of this ionic hybrid polyethylene with spherical single molecule or aggregate morphology, can directly build nano-scale polymer materials.