Probing the interior lamellar periodicity and nano-assembly of polymer spherulites via combinatory etching methodology

Graecia Lugito, Eamor Woo, Megawati Zunita, I. Gede Wenten

Research output: Contribution to journalArticle

Abstract

Physical and chemical degradative effects of etching agents on polymer spherulites have been explored thoroughly to understand the etching mechanism as well as to perceive the polymer crystal structure and assembly. Interior lamellae of an aromatic polyester, poly(trimethylene terephthalate) (PTT), crystallized into a well-defined periodic-birefringent spherulitic structure, are subjected to sequence-assorted etching agents of basic methylamine (MA) vapor, acidic permanganate (KMnO4) reagent, inorganic acids mixture (H2SO4:H3PO4), and organic dichloroacetic acid (DCA). The chemistry involved in reactions between the selected etchants with the polymer spherulites was probed and their synergistic effects on exposing the interior 3D assembly were assessed. The exposed circumferential alignment of rod-like polycrystals interconnected by nanofibrils signifies the hidden interfaces between the lamellae that are assembled in a periodic grating structure to form banded PTT spherulites.

Original languageEnglish
Pages (from-to)179-187
Number of pages9
JournalPolymer
Volume176
DOIs
Publication statusPublished - 2019 Aug 2

Fingerprint

Etching
Polymers
Dichloroacetic Acid
Dichloroacetic acid
Inorganic acids
Polyesters
Organic acids
Polycrystals
Crystal structure
Vapors
methylamine
permanganic acid
poly(trimethylene terephthalate)

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Lugito, Graecia ; Woo, Eamor ; Zunita, Megawati ; Wenten, I. Gede. / Probing the interior lamellar periodicity and nano-assembly of polymer spherulites via combinatory etching methodology. In: Polymer. 2019 ; Vol. 176. pp. 179-187.
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abstract = "Physical and chemical degradative effects of etching agents on polymer spherulites have been explored thoroughly to understand the etching mechanism as well as to perceive the polymer crystal structure and assembly. Interior lamellae of an aromatic polyester, poly(trimethylene terephthalate) (PTT), crystallized into a well-defined periodic-birefringent spherulitic structure, are subjected to sequence-assorted etching agents of basic methylamine (MA) vapor, acidic permanganate (KMnO4) reagent, inorganic acids mixture (H2SO4:H3PO4), and organic dichloroacetic acid (DCA). The chemistry involved in reactions between the selected etchants with the polymer spherulites was probed and their synergistic effects on exposing the interior 3D assembly were assessed. The exposed circumferential alignment of rod-like polycrystals interconnected by nanofibrils signifies the hidden interfaces between the lamellae that are assembled in a periodic grating structure to form banded PTT spherulites.",
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Probing the interior lamellar periodicity and nano-assembly of polymer spherulites via combinatory etching methodology. / Lugito, Graecia; Woo, Eamor; Zunita, Megawati; Wenten, I. Gede.

In: Polymer, Vol. 176, 02.08.2019, p. 179-187.

Research output: Contribution to journalArticle

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