有机无机杂化热塑性弹性体的设计、合成与表征

项目名称： 有机无机杂化热塑性弹性体的设计、合成与表征

项目编号： No.50873009

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 化学工业

项目作者： 徐日炜

作者单位： 北京化工大学

项目金额： 35万元

中文摘要： 为实现本项目提出的有机无机杂化热塑性弹性体的分子设计，课题组对单官能、双官能或多官能多面体低聚倍半硅氧烷（POSS）的设计、合成进行了研究，制备了包括系列单取代POSS和多种双塔型POSS。确定了聚苯乙烯、氢化聚（苯乙烯－b－丁二烯－b－苯乙烯）嵌段共聚物（SEBS）的氯甲基化条件，实现氯甲基化聚苯乙烯和氯甲基化SEBS的可控制备。提出了基于巯基加成反应的合成路线，实现聚（苯乙烯－b－丁二烯－b－苯乙烯）嵌段共聚物（SBS）接枝POSS的快速、简便的合成，该方法普遍适用于含双键的聚合物，例如含双键的弹性体材料，以调节体系的动态力学行为。采用基于炔基－叠氮加成反应的合成路线，实现了SEBS-g-POSS，其中POSS可控地接枝于聚苯乙烯段，其中POSS组装呈现不规则的形状；初步研究发现，SEBS-g-POSS的低温性能没有改变，但是高温性能提升不显著，这与POSS的结构有关，尚需进一步研究。课题组利用所制备的POSS化合物与热固性树脂（苯并噁嗪（BZ）、三嗪树脂（BT）等）或聚羟基烷酸酯（PHB）进行改性；探索了合成苯并噁嗪的新途径。此外课题组还应邀参与了苯并噁嗪专著部分章节的撰写。

中文关键词： 杂化;弹性体;POSS;合成;点击化学

英文摘要： For the development of organic-inorganic hybrid thermoplastic elastomers, the synthetic methods for mono, dual or multifunctional polyhedral oligomeric silsesquioxanes (POSS) were studied in our group. The conditions for the chloromethylation of polystyrene and SEBS were studied and optimized, and the chloromethylation reaction were controlled well for the modification of polystyrene and SEBS. SBS-g-POSS were prepared via thiol-ene reaction, and it was a simple approach for the synthesis of polymer grafted POSS, in which containing C=C bond in the molecules of the polymer, and the dynamic properties of resulted polymers can be adjusted. SEBS-g-POSS were synthesized via click chemistry approach, in which the POSS grafted in the polystyrene segments. The Tg of SEBS-g-POSS were complicated that the Tg of EB segment were little affected by POSS, while the Tg of polystyrene segment were a little affected by POSS as well in present studied, and the Tg may be affected by the structure of POSS which need further study. The properties of those elastomers were carried out in the future. The usage of POSS prepared by our groups were studied, eg. polybenzoxazine/POSS, BT/POSS, and PHB/POSS composites were prepared, the results shown that the properties of composites can be improved for the introduction of POSS. Meanwhile we explored the approach for the synthesis of benzoxazine resins from renewable resource. For our effort in the development of benzoxazine hybrid materials, we are invited to write two chapters for the Handbook of Benzoxazine Resins which is the first book on this subject in the world.

英文关键词： hybrid;elstomer;POSS;synthesis;click chemistry