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Reversible Star Assembly of Polyolefins Using Interconversion between Boroxine and Boronic Acid

Abstract

Synthetic methods for star-shaped polyolefins has been strongly desired for a long time because they would show large differences in processability and surface property compared with linear polyolefin. However, present reported synthetic methods are mostly limited for the synthesis of highly branched star polyethylene and there was no example for the reversible star assemblies. In this contribution, we demonstrated the synthesis of boronic acid end-functionalized polyolefins by living polymerization system and their reversible star assembly according to boronic acid-boroxine interconversion. Multiple boron atoms were successfully incorporated to the chain end of the polymer by the sequential addition of boronic acid-containing olefin and the other monomer and the reversible star assembly was confirmed by NMR and GPC measurement. Star poly(norbornene-co-1-octene) prepared by this method showed highly elastic property, whereas the corresponding linear non-functionalized copolymer was highly viscous material.

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Publication details

The article was received on 05 Apr 2018, accepted on 11 Jun 2018 and first published on 12 Jun 2018


Article type: Paper
DOI: 10.1039/C8PY00519B
Citation: Polym. Chem., 2018, Accepted Manuscript
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    Reversible Star Assembly of Polyolefins Using Interconversion between Boroxine and Boronic Acid

    R. Tanaka, N. Tonoko, S. Kihara, Y. Nakayama and T. Shiono, Polym. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8PY00519B

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