FLUORINE CONTAINING DENDRIMERS & HYPERBRANCHED MACROMOLECULES

含氟的树枝状和超支化大分子是 被专门设计和合成以评估他们的1) 微观力学性能；2)链端的反应性 3)链端的位置和移动性。这个 涉及亲核的超支化含氟聚合物的合成 芳香取代促进A2B缩聚反应 单体，其中A为五氟苯基，B为苄基 酒精。分子间反应产生聚合物材料， 而大循环是由分子内反应引起的 超支化聚合物结构内的形成和终止 独特的B官能团。MALDI-TOF质谱仪 用来评估和量化环化的程度，通过 观察到m/z不同的非环状和环状产物峰 由于循环形成时HF的损失，单位减少了20个单位。这个 在每个聚合度的环化程度是 可单独辨认的。线型聚合物类似物的制备 超支化氟聚合物现在正在一次又一次地进行中， 大环分子量和程度的表征 编队将由MALDI-TOF进行。

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.