Three types of banded structures in highly birefringent poly(trimethylene terephthalate) spherulites

Graecia Lugito, Eamor M. Woo

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Poly(trimethylene terephthalate) (PTT), a highly birefringent aromatic polyester, has been utilized to understand the mechanisms of crystal assembly into diversified types of banded spherulites. PTT exhibits three main types of banded spherulites (i.e., concentric, single-spiral, and double-spiral) co-existing in sample films melt-crystallized at 165 °C, regardless of sample thickness. The three types differ in their banding structures, interference color distributions, and nuclei geometries (S-shape, Z-shape, or dot-shape). Core diameter, band spacing ratio, and height difference (Δz) around the core are the three key parameters of different banding patterns in PTT spherulites. Formation mechanism for three types of banded spherulites has been interpreted, and found to be highly correlated with the initial geometry shapes of their nuclei.

Original languageEnglish
Pages (from-to)1207-1216
Number of pages10
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume54
Issue number13
DOIs
Publication statusPublished - 2016 Jul 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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