A Highly Efficient Aromatic Amine Ligand/Copper(I) Chloride Catalyst System for the Synthesis of Poly(2,6-dimethyl-1,4-phenylene ether)open access
- Authors
- Kim, K.[Kim, K.]; Shin, M.J.[Shin, M.J.]; Kim, Y.T.[Kim, Y.T.]; Kim, J.I.[Kim, J.I.]; Ki, Y.J.[Ki, Y.J.]
- Issue Date
- Apr-2018
- Publisher
- MDPI
- Keywords
- 3,3' ,5,5' -tetramethyl-4,4' diphenoquinone; Aromatic amine ligand; Copper(I) chloride; Highly effective catalyst; Poly(2,6-dimethyl-1,4-phenylene ether); Rate of polymerization
- Citation
- POLYMERS, v.10, no.4
- Indexed
- SCIE
SCOPUS
- Journal Title
- POLYMERS
- Volume
- 10
- Number
- 4
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/20481
- DOI
- 10.3390/polym10040350
- ISSN
- 2073-4360
- Abstract
- Highly active catalyst systems for polymerizing 2,6-dimethylphenol were studied by using aromatic amine ligands and copper(I) chloride. The aromatic amine ligands employed were pyridine, 1-methylimidazole, 2-aminopyridine, 3-aminopyridine, and 4-aminopyridine. A mixture of chloroform and methanol (9:1, v/v) was used as a polymerization solvent. All experiments were performed with oxygen uptake measurement apparatus, while the reaction rate for each aromatic amine ligand-Cu catalyst system and the amount of by-product, 3,3',5,5'-Tetramethyl-4,4' diphenoquinone (DPQ), were measured to determine the efficiency of the catalyst systems. The 4-aminopyridine/Cu (I) catalyst system was found to be extremely efficient in poly(2,6-dimethyl-1,4-phenylene ether) (PPE) synthesis; it had the fastest reaction rate of 6.98 x 10(-4) mol/L.s and the lowest DPQ production. The relatively high basicity of 4-aminopyridne and the less steric hindrance arising from a coordination of Cu and 4-aminopyridine in this catalyst are responsible for the fast polymerization rate. When 2-aminoprydine (an isomer of 4-aminopyridine) was used as a ligand, however, no polymerization occurred probably due to steric hindrance.
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Collections - Engineering > Chemical Engineering > 1. Journal Articles
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