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Crystallization, Orientation and Solid−Solid Crystal Transition of Polybutene‐1 Confined within Nanoporous Alumina

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اقرأ أكثر
  • معلومة اضافية
    • Additional Titles:
      Crystallization, Orientation, and Solid−Solid Crystal Transition of Polybutene‑1 Confined within Nanoporous Alumina
    • Publisher Information:
      ACS 2020-07-31
    • نبذة مختصرة :
      Unformatted post-print version of the accepted article
      The effect of confinement on the crystallization, crystal orientation, and polymorphic crystal transition of bulk and infiltrated polybutene-1 (PB-1) within nanoporous alumina templates (AAO) were studied. After cooling from the melt, PB-1 within AAO templates crystallized into the tetragonal Form II directly. The nucleation process inside the AAO pores was probably homogeneous when pore sizes were below 200 nm. The crystal orientation of Form II was investigated by grazing angle X-ray scattering. Form II to I transition was investigated as a function of time and modeled with the Avrami equation. The rate of Form II to I transition for infiltrated PB-1 within 400 nm AAO was unexpectedly higher than that of the bulk. The stress generated due to the mismatch of the thermal expansion coefficients between PB-1 and AAO greatly enhanced the nucleation of Form I within the Form II matrix. A slower Form II to I transition was observed when the pore diameter of AAO decreased. The transition degree decreased with decreasing pore diameter and was completely inhibited for PB-1 infiltrated within the 30 nm AAO template. A stable Form II interfacial layer with a thickness of ~ 12 nm was postulated to account for this phenomenon.
    • الموضوع:
      crystals; crystallization; genetics; nucleation; annealing (metallurgy); info:eu-repo/semantics/article
    • Availability:
      Open access content. Open access content
    • Note:
      This work is supported by the National Key R&D Program of China (2017YFE0117800) and the National Natural Science Foundation of China (21873109 and 21922308). We acknowledge sponsorship from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No 778092. G. L. is grateful to the Youth Innovation Promotion Association of the Chinese Academy of Sciences (Y201908).
      English
    • Other Numbers:
      ESUPV oai:addi.ehu.eus:10810/50790
      1364731201
    • Contributing Source:
      REPOSITORIO DE LA UNIVERSIDAD DEL PAIS
      From OAIster®, provided by the OCLC Cooperative.
    • الرقم المعرف:
      edsoai.on1364731201
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