Double-Decker-Type Dipalladium Catalysts for Copolymerization of Ethylene with Acrylic Anhydride,Macromolecules

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Double-Decker-Type Dipalladium Catalysts for Copolymerization of Ethylene with Acrylic Anhydride
Macromolecules ( IF 5.1 ) Pub Date : 2018-07-03 00:00:00 , DOI: 10.1021/acs.macromol.8b00569
Daisuke Takeuchi _{1,

2} , Takashi Iwasawa ₁ , Kohtaro Osakada ₁

Affiliation

Dipalladium complex with a macrocyclic ligand having two diimine sites catalyzes copolymerization of ethylene with acrylic anhydride to afford the copolymer containing the repeating unit from acrylic anhydride. The obtained copolymer contains the cyclic and acyclic anhydride groups in high content (up to 5.7 mol %) in the main chain. It is contrasted with that the monopalladium complex with the diimine ligand catalyzes the reaction to yield the copolymer having the polar group at the end of branches with lower content (0.8 mol %). Decreased ethylene pressure of the reaction using the dipalladium catalyst results in increase in the polar comonomer unit content. Methanolysis of the copolymer takes place smoothly to give the polymer with both carboxylic acid and ester groups in the polymer chain.

中文翻译：

乙烯与丙烯酸酐共聚合的双层型二钯催化剂

具有具有两个二亚胺位点的大环配体的二钯络合物催化乙烯与丙烯酸酐的共聚，从而由丙烯酸酐得到包含重复单元的共聚物。所获得的共聚物在主链中含有高含量（至多5.7mol％）的环状和无环酸酐基团。相比之下，具有二亚胺配体的单钯络合物催化该反应，从而以较低的含量（0.8mol％）得到在支链末端具有极性基团的共聚物。使用二钯催化剂的反应中乙烯压力的降低导致极性共聚单体单元含量的增加。共聚物的甲醇解反应顺利进行，得到的聚合物在聚合物链中同时具有羧酸基和酯基。

更新日期：2018-07-03

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