Extension of polyethylene chains by formation of polypseudorotaxane structures with perpentylated pillar[5]arenes
Extension of polyethylene chains by formation of polypseudorotaxane structures with perpentylated pillar[5]arenes
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DOI：
10.1038/pj.2013.67
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发表时间：
2014
期刊：
影响因子：
2.8
通讯作者：
Tomoki Ogoshi;Hitoshi Kayama;Takamichi Aoki;T. Yamagishi;R. Ohashi;M. Mizuno
中科院分区：
文献类型：
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作者：
Tomoki Ogoshi;Hitoshi Kayama;Takamichi Aoki;T. Yamagishi;R. Ohashi;M. Mizuno
本文报道了高密度聚乙烯（PE）（HDPE）链通过与全戊基化柱[5]芳烃形成聚芳氧烷结构的延伸。HDPE的聚合物链和全戊基化的柱[5]芳烃的轮的熔融混合导致形成聚苯乙烯dorotaxane结构。聚硅氧烷结构的形成导致HDPE链的延伸，这显著地将HDPE的熔点从126 ℃提高到152 ℃。我们还展示了熔融到固体和固体到熔融状态的HDPE的主-客体系统的基础上的转变。HDPE在140 ℃下熔化，但在加入全戊基化的柱[5]芳烃后变为固体.进一步添加竞争客体1，4-二溴丁烷的固体混合物诱导的固体到熔融态的转变。
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.