Abstract
Herein, the extension of high-density polyethylene (PE) (HDPE) chains by formation of polypseudorotaxane structures with perpentylated pillar[5]arenes is reported. Melt mixing of polymeric chains of HDPEs and wheels of perpentylated pillar[5]arenes resulted in formation of polypseudorotaxane structures. The formation of the polypseudorotaxane structures led to extension of the HDPE chains, which dramatically increased the melting point of the HDPE from 126 to 152 °C. We also demonstrated molten-to-solid and solid-to-molten state transitions of HDPE based on the host–guest system. HDPE was melted at 140 °C, but changed to a solid upon addition of perpentylated pillar[5]arenes. Further addition of competitive guest 1,4-dibromobutane to the solid mixture induced a solid-to-molten state transition.
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Acknowledgements
This work was partly supported by The Japan Securities Scholarship Foundation and Technology (MEXT), Japan and JSPS KAKENHI 23655210 (a Grant-in-Aid for Challenging Exploratory Research).
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Ogoshi, T., Kayama, H., Aoki, T. et al. Extension of polyethylene chains by formation of polypseudorotaxane structures with perpentylated pillar[5]arenes. Polym J 46, 77–81 (2014). https://doi.org/10.1038/pj.2013.67
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DOI: https://doi.org/10.1038/pj.2013.67
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