In-situ growth of nucleus geometry to dual types of periodically ringed assemblies in poly(Nonamethylene terephthalate)

Eamor M. Woo, Chien Hua Tu, Selvaraj Nagarajan, Graecia Lugito

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Monitoring of nucleus geometry and growth into dual types of periodically ring-banded morphology in poly(nonamethylene terephthalate) (PNT), respectively, Type-1 and Type-2, are done with detailed analyses using polarized-light optical microscopy (POM) in-situ CCD recording; the periodic assembly morphologies are characterized using atomic-force microscopy (AFM) and scanning electron microscopy (SEM). Different annealing treatments (Tmax = 110, 120, 130C) are accomplished at a crystallization temperature of 85C; effects on the nucleus geometry, number (25–10%) and volume fractions (33–15%) of Type-2 among two types of banded PNT spherulites are expounded. Growth of a specific type of periodically banded PNT spherulite is initiated from either highly elongated sheaf-like or well-rounded nuclei, with the final grown lamellae being self-packed as multi-shell structures. Nucleation geometry and crystallization parameters collectively lead to development of multiple types of banded PNT spherulites of different relative fractions.

Original languageEnglish
Article number1338
JournalCrystals
Volume11
Issue number11
DOIs
Publication statusPublished - 2021 Nov

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • General Materials Science
  • Condensed Matter Physics
  • Inorganic Chemistry

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