高分支狀聚醚酮

Abstract

本論文討論利用具有AB2型式的單體3, 5-diphenoxybenzoic acid和5-phenoxyisophthalic acid進行自身縮合的聚合反應，使用PPMA（五氧化二磷╱甲磺酸）當縮合劑和溶劑，可分別得到PEK(Ⅰ)及PEK(Ⅱ)高分支枝狀聚醚酮。高分支狀聚合物含有大量的末端官能基，而這一類高分子的物理性質，例如熱性質及溶解度，都和末端官能基的本質有很大的關係。利用核磁共振儀分析及模式化合物的輔助，測得PEK(Ⅱ)的分支度約為50~60%之間，這和一些其它高分支狀聚合物所見到的分支度相近。PEK(Ⅱ)的銨鹽是水溶性的，具有單分子微胞的性質。

Self-condensation of AB2 type monomers 3, 5-diphenoxy-benzoic acid and 5-phenoxyisophthalic acid, using PPMA (phoshorus pentoxide/methanesulfonic acid) as condensing agent and solvent yielded hyperbranched poly (ether ketone) PEK(Ⅰ) and PEK(Ⅱ), respectively, The hyperbranched macromolecules contain a large number of chain end function groups, and the physical properties of the polymers such as thermal property and solubility depend on the nature of the chain ends. The degree of branching of PEK(Ⅱ) was determined with the help of model compounds using H-NMR and was found to be near 50~60%, similar to what has been observed in other hyperbranched polymer systems. The ammonium salt of PEK(Ⅱ) is water-soluble and has the property of unimolecular micelle.