Exploratory and Mechanistic Studies of the Trimerization Reaction of Benzoylacetylenes in the Presence of a Secondary Amine
作者:Kenji Matsuda、Nobuo Nakamura、Hiizu Iwamura
DOI:10.1246/cl.1994.1765
日期:1994.9
A variety of benzoylacetylenes are trimerized to give the corresponding 1,3,5-tribenzoylbenzenes when heated with a catalytic amount of diethylamine. A large amount of diethylamine gives γ-(diethylamino)propenoylbenzene at the expense of 1,3,5-tribenzoylbenzene, verifying a Michael-addition/trimerization/elimination-type mechanism for the formation of the benzene ring.
A star polymer is produced by converting a central compound having at least three functional groups X, an arylene compound having two functional groups Y, and a terminal group compound having a functional group Z, the functional groups X of the central compound each reacting with a functional group Y of the arylene compound, forming a covalent bond, and the functional group Z of the terminal group compound reacting with a functional group Y of the arylene compound, forming a covalent bond, the terminal group compound being used in a stoichiometric quantity that corresponds essentially to the stoichiometric quantity of the functional groups X of the central compound, and to a method for producing star polymers, a polymer mixture including star polymers, and to the use of star polymers.
POLYMER AND POLYMER ELECTROLYTE MEMBRANE COMPRISING SAME
申请人:LG CHEM, LTD.
公开号:US20170317370A1
公开(公告)日:2017-11-02
The present specification relates to a polymer with improved acid resistance, a polymer electrolyte membrane including the same, a membrane-electrode assembly including the polymer electrolyte membrane, a fuel cell including the membrane-electrode assembly, and a redox flow battery including the polymer electrolyte membrane.
POLYMER ELECTROLYTE MEMBRANE
申请人:LG CHEM, LTD.
公开号:US20170331136A1
公开(公告)日:2017-11-16
The present specification relates to a polymer electrolyte membrane including a polymer and inorganic particles.