Abstract
The influence of alkali metal counter cations of initiators on the anionic copolymerization of p-anisaldehyde (ANA) with dimethylketene (DMK) in tetrahydrofuran at −78°C was investigated. The copolymerization using benzophenone-disodium and -dipotassium complexes resulted in the formation of an ANA—DMK copolymer rich in DMK units, while the lithium complex gave the ANA—DMK alternating copolymer as previously reported. An obvious difference in the sequence distribution of the copolymers was detected by the NMR analysis.
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Hashimoto, K., Sumitomo, H. & Hayakawa, N. Anionic Copolymerization of p-Anisaldehyde with Dimethylketene Initiated by Benzophenone-Dialkali Metal Complexes. Polym J 6, 391–395 (1974). https://doi.org/10.1295/polymj.6.391
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DOI: https://doi.org/10.1295/polymj.6.391