A Systematic Study of Peripherally Multiple Aromatic Ester-Functionalized Poly(benzyl ether) Dendrons for the Fabrication of Organogels: Structure-Property Relationships and Thixotropic Property
作者:Yu Feng、Zhi-Xiong Liu、Hui Chen、Zhi-Chao Yan、Yan-Mei He、Chen-Yang Liu、Qing-Hua Fan
DOI:10.1002/chem.201400157
日期:2014.6.2
A new class of peripherally multiple aromatic ester‐functionalized poly(benzyl ether) dendrons and/or dendrimers with different focal point substituents, surface groups, interior structures, as well as different generations have been synthesized and their structure–property relationships with respect to their gelation ability have been investigated systematically. Most of these dendrons are able to
合成了具有不同焦点取代基,表面基团,内部结构以及不同世代的一类新型的由外围芳族酯官能化的聚(苄基醚)树枝状和/或树枝状大分子,并且它们之间的结构-性质关系系统地研究了胶凝能力。这些树突中的大多数都能够在很宽的极性范围内凝胶化有机溶剂。不仅在胶凝能力上而且在热致,形态和流变学特征中均观察到明显的树突作用。公开了外围酯官能度和内部树状结构的细微变化显着影响了树突的胶凝行为。在研究的所有树突中,第二代和第三代树突以邻苯二甲酸间苯二甲酸二甲酯(DMIP)为外围基团的G 0 G 2 -Me和G 0 G 3 -Me表现出最佳的胶凝能力,并且在22种以上的芳香族和极性有机溶剂中形成了稳定的凝胶。最低临界胶凝浓度(CGC)达到2.0 mg mL -1,表明一个树枝状分子可截留约1.35×10 4个溶剂分子。通过结合单晶/粉末X射线衍射(XRD)分析和浓度依赖性(CD)/温度依赖性(TD)1来进一步研究凝胶形成的驱动力11