Alternating Ring-Opening Copolymerization of Cyclohexene Oxide and Maleic Anhydride with Diallyl-Modified Manganese(III)-Salen Catalysts

作者：Liu, Dengfeng^*; Zhang, Zhao; Zhang, Xingmei; Lu, Xingqiang

来源：Australian Journal of Chemistry, 2016, 69(1): 47-55.

DOI：10.1071/CH15162

• MALDI-TOF-MS
• ALUMINUM PORPHYRIN
• PHTHALIC-ANHYDRIDE
• CYCLIC ANHYDRIDES
• BETA-LACTONE
• EPOXIDES
• POLYMERIZATION
• CO2
• TERPOLYMERIZATION
• COMPLEXES

A series of diallyl-modified (salen) Mn-III complexes have been designed, synthesized, and applied in the cyclohexene oxide and maleic anhydride ring-opening copolymerization. The experimental results show that these complexes are effective in the presence of co-catalyst 4-(dimethylamino) pyridine (DMAP). Of all the five catalysts, the catalyst (salcyen) MnCl (salcyen = 2-((E)-(2-((E)-5-allyl-2-hydroxy-3-methoxybenzylideneamino) cyclohexylimino) methyl)-4-allyl-6-methoxyphenol) exhibited the best catalytic performance under the conditions applied, and the cyclohexane of diimine bridge is conjugated with the two diallyl-salen-type moieties. This conjugation can increase the electron density of the centre Mn-III cation so that catalyst (salcyen) MnCl favours the formation of reaction intermediates. Moreover, the anion effect of Cl- is proved to be the best in the catalytic performances. Among the three co-catalysts (DMAP, triphenylphosphine (Ph3P), and tetra-n-butylammonium bromide (n-Bu4NBr)) tested, DMAP is the most efficient towards monomer conversion and polymer chain growth.

• 出版日期2016
• 单位西安科技大学; 西北大学