FLUORINE CONTAINING DENDRIMERS & HYPERBRANCHED MACROMOLECULES

含氟树枝状和超支化大分子， 专门设计和合成，以评估1） 微观力学性能; 2）链端的反应性 基团，和; 3）链端的位置和移动性。 的 超支化含氟聚合物的合成涉及亲核性 芳香取代促进A2 B的缩聚 单体，其中A是五氟苯基，B是苄基 酒精 分子间反应产生聚合物材料， 而分子内反应则是大环化合物 超支化聚合物结构内的形成和终止 独特的B官能团。 MALDI-TOF质谱分析 用于评价和量化环化的程度， 非环状和环状产物峰的观察结果，m/z不同 单位乘以20单位，因为循环形成时HF损失。 的 在每个聚合度的环化程度是 可识别的个体。 制备线性聚合物类似物以 超支化含氟聚合物现在正在进行中， 大环化合物分子量和链节的表征 将通过MALDI-TOF进行形成。

Fluorine-containing dendritic and hyperbranched macromolecules are being designed and synthesized specifically to evaluate 1) their micromechanical properties; 2) the reactivities of the chain end groups, and; 3) the location and mobility of the chain ends. The synthesis of the hyperbranched fluoropolymers involves nucleophilic aromatic substitution facilitated condensation polymerization of A2B monomers, where A is a pentafluorophenyl group and B is a benzylic alcohol. Intermolecular reactions produce polymeric materials, whereas intramolecular reactions are responsible for macrocycle formation within the hyperbranched polymer structure and termination of the unique B functional group. MALDI-TOF mass spectrometry was employed to evaluate and quantify the extent of cyclization by observation of the acyclic and cyclic product peaks, differing in m/z units by 20 units due to the loss of HF upon cycle formation. The extent of cyclization at each degree of polyme riz ation was individually identifiable. Preparation of linear polymer analogs to the hyperbranched fluoropolymers is now underway and again, characterization of the molecular weights and extent of macrocycle formation will be made by MALDI-TOF.