title: Comparison of Properties among Dendritic and Hyperbranched Poly(ether ether ketone)s and Linear Poly(ether ketone)s.
abstract: Poly(ether ether ketone) dendrimers and hyperbranched polymers were prepared from 3,5-dimethoxy-4'-(4-fluorobenzoyl)diphenyl ether and 3,5-dihydroxy-4'-(4-fluorobenzoyl)diphenyl ether through aromatic nucleophilic substitution reactions. 1-(tert-Butyldimethylsiloxy)-3,5-bis(4-fluorobenzoyl)benzene was polycondensed with bisphenols, followed by cleavage of the protective group to form linear poly(ether ketone)s having the same hydroxyl groups in the side chains as the chain ends of the dendrimer and hyperbranched polymers. Their properties, such as solubilities, reduced viscosities, and thermal properties, were compared with one another. Similar comparisons were also carried out among the corresponding methoxy group polymers, and the size of the molecules was shown to affect the properties.
authors.affiliation: Department Biomolecular Functional Engineering, Ibaraki University, 4-12-1, Nakanarusawa, Hitachi, Ibaraki 316-8511, Japan. atsushi.morikawa.reg@vc.ibaraki.ac.jp.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Morikawa
mesh_terms: D001559:Benzhydryl Compounds / Q000737:chemistry; D050091:Dendrimers / Q000737:chemistry; D007659:Ketones / Q000737:chemistry*; D015394:Molecular Structure; D010647:Phenyl Ethers / Q000138:chemical synthesis* / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D012995:Solubility
chemical_list: D001559:Benzhydryl Compounds; D050091:Dendrimers; D007659:Ketones; D010647:Phenyl Ethers; D011108:Polymers
keywords: hyperbranched polymers; linear poly(ether ketone)s; molecular size; poly(ether ether ketone) dendrimers; reduced viscosities; solubility; thermal properties