Periodic Assembly of Polyethylene Spherulites Re-Investigated by Breakthrough Interior Dissection

Selvaraj Nagarajan, Eamor M. Woo

Research output: Contribution to journalArticlepeer-review

Abstract

A completely novel 3D dissection approach is taken to re-investigate high-density polyethylene (HDPE) crystallized into periodic architectures in a wide range of Tc. This work first discovers that ring bands present in HDPE are crystallized in a quite wide Tc range (90–120 °C) all within regime-III growth. With further detailed analyses of the top-surface-relief patterns and 3D architectures of HDPE spherulites, this work has fully clarified the periodic morphology packed with alternate ways of single-crystal aggregates in correlation with the optical banding patterns. The proposed assembly mechanism sheds light that the periodic bands are actually composed of a cross-hatch grating structure in that the alternately perpendicular orientations from the ridge to valley bands being related to the interior radial to tangential lamellae. Such grating architectures in the interiors of HDPE can be viewed as a mimicry resembling shish-kebab lamellae self-aligned by Archimedean spiral-spins from the nucleus center.

Original languageEnglish
Article number2000708
JournalMacromolecular Rapid Communications
Volume42
Issue number9
DOIs
Publication statusPublished - 2021 May

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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