Synthesis of Strained Macrocyclic Biaryls for Enthalpy-Driven Ring-Opening Polymerization
摘要:
Polymerizable macrocyclic biarylene-ether-ketones and biarylene-ether-sulfones are accessible from linear, bis(chloro)-terminated oligomers via nickel-catalyzed, intramolecular coupling under pseudo-high-dilution conditions. Single-crystal X-ray analyses of the resulting cyclo-oligomers reveal extremely distorted and highly strained geometries, with 4,4 '-biphenylene units showing deviations of up to 70 degrees from linearity.
Synthesis of Strained Macrocyclic Biaryls for Enthalpy-Driven Ring-Opening Polymerization
摘要:
Polymerizable macrocyclic biarylene-ether-ketones and biarylene-ether-sulfones are accessible from linear, bis(chloro)-terminated oligomers via nickel-catalyzed, intramolecular coupling under pseudo-high-dilution conditions. Single-crystal X-ray analyses of the resulting cyclo-oligomers reveal extremely distorted and highly strained geometries, with 4,4 '-biphenylene units showing deviations of up to 70 degrees from linearity.
Polyarylene, Process For Producing The Same, Solid Polyelectrolyte, And Proton-Conductive Film
申请人:Yamakawa Yoshitaka
公开号:US20080015389A1
公开(公告)日:2008-01-17
A polyarylene having a structural unit shown by the following formula (1) is disclosed.
wherein X and Y indicate a divalent organic group or a single bond, Z shows an oxygen atom or a sulfur atom, R represents at least one atom or group selected from the group consisting of a hydrogen atom, a fluorine atom, an alkyl group, and a fluorine-substituted alkyl group, a is an integer of 1 to 20, n is an integer of 1 to 5, and p is an integer of 1 to 10.
ELECTROLYTE MEMBRANE, MEMBRANE-ELECTRODE ASSEMBLY, AND SOLID POLYMER FUEL CELL
申请人:JSP CORPORATION
公开号:US20160149250A1
公开(公告)日:2016-05-26
The present invention relates to an electrolyte membrane, a membrane-electrode assembly and a polymer electrolyte fuel cell. The electrolyte membrane contains a polymer (1) including a hydrophobic structural unit and a structural unit having a proton-conducting group and a polymer (2) including a hydrophobic structural unit having no sulfonic group which is different from the hydrophobic structural unit of the polymer (1).
Halogenated aromatic compound, polymer thereof, and proton-conductive membrane comprising same
申请人:JSR Corporation
公开号:EP1245555B1
公开(公告)日:2009-08-19
POLYARYLENE-BASED POLYMER, PREPARATION METHOD FOR THE SAME, AND POLYMER ELECTROLYTE MEMBRANE FOR FUEL CELL USING THE POLYMER
申请人:Hwang Inchul
公开号:US20120309857A1
公开(公告)日:2012-12-06
Disclosed herein is a polyarylene-based polymer, a preparation method for the same, and a polymer electrolyte membrane for fuel cell using the polymer. The polyarylene-based polymer, which is designed to have long side chains of a hydrophilic moiety and dense sulfonic acid groups, may improve the formation of ion channels when fabricating a polymer membrane and also ensures good chemical stability of the hydrophilic moiety and good dimensional stability against water. Further, the preparation method of the present invention simplifies production of the polymer, and polymer electrolyte membranes using the polymer exhibits improved properties as a polymer electrolyte membrane for a fuel cell, such as high proton conductivity, even under an atmosphere of low water uptake, and good dimensional stability against a long-term exposure to water.