柱[5]芳烃共价偶联聚乙二醇聚拟轮烷滑环材料的合成与流变性质  

Synthesis and Rheological Properties of Pillar[5]arene-polyethylene Glycol-conjugated Poly(pseudo)rotaxanes as Slide-ring Materials

作　　者：刘诗佳 李倩 崔崑[2] 马志[2] 张丹维[1] 王辉[1] 黎占亭[1,2] LIU Shijia;LI Qian;CUI Kun;MA Zhi;ZHANG Danwei;WANG Hui;LI Zhanting(Department of Chemistry,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Fudan University,Shanghai 200438,China;Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules,Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,Shanghai 200032,China)

机构地区：[1]复旦大学化学系,上海市分子催化和功能材料重点实验室,上海200438 [2]中国科学院上海有机化学研究所,有机功能分子合成与组装化学重点实验室,上海200032

出　　处：《高等学校化学学报》2023年第10期144-153,共10页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21921003,21890730,21890732)资助。

摘　　要：通过柱[5]芳烃与高分子量聚乙二醇共价交联构筑了系列互穿交联聚合物,经过退火制备了柱芳烃-聚乙二醇互穿滑环材料.核磁滴定实验、模型分子互穿实验以及高分子量聚乙二醇互穿等研究结果表明,在该聚合物中柱[5]芳烃与聚乙二醇发生晶态络合并达到互穿平衡. X射线粉末衍射及差示扫描量热-热重分析实验结果证实该互穿滑轮聚合物具有良好的晶型结构、热性能及热稳定性,由分子量为1×106的聚乙二醇合成的固态聚拟轮烷表现出较好的滑环效应,其流变行为受到链长度、滑环数量和滑环运动等因素影响.在引入滑环分子柱[5]芳烃后,该固体滑环材料表现出较好的热稳定性、柔性以及弹性机制响应性.A series of pillar[5]arene(P5)-polyethylene glycol(PEG)-linked polymers was prepared.The new polymers were revealed to form interpenetrated poly(pseudo)rotaxanes by the threading of the PEG chains into the cavity of P5 in solvent-free melted state.The interpenetration of the new poly(pseudo)rotaxanes were confirmed by proton nuclear magnetic resonance(^(1)H NMR)titration spectra experiments.X-ray powder diffraction,differential scanning calorimetry,and thermal gravimetric analysis experiments supported that the interpenetrating slide-ring polymers have good crystal structures,thermal performance and thermal stability,while the solid-state poly(pseudo)rotaxanes formed by PEG of approximately 1×10^(6) molecular weight exhibited good slide ring effects and their rheological behaviors were influenced by factors such as chain length,slide ring number,and slide ring motion.The results show that P5 is a useful macrocycle to form new solid-state slide-ring polymers that can exhibit good thermal stability,flexibility,and elastic mechanism responsiveness.

关 键 词：芳烃 聚乙二醇 聚拟轮烷 滑环材料 流变性质 

分 类 号：O641.3[理学—物理化学]