Cargando…

Unique Periodic Rings Composed of Fractal-Growth Dendritic Branching in Poly(p-dioxanone)

Amorphous poly(p-vinyl phenol) (PVPh) was added into semicrystalline poly(p-dioxanone) (PPDO) to induce a uniquely novel dendritic/ringed morphology. Polarized-light optical, atomic-force and scanning electron microscopy (POM, AFM, and SEM) techniques were used to observe the crystal arrangement of...

Descripción completa

Detalles Bibliográficos
Autores principales: Huang, Kuan-Ying, Woo, Eamor M., Nagarajan, Selvaraj
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8963038/
https://www.ncbi.nlm.nih.gov/pubmed/35215718
http://dx.doi.org/10.3390/polym14040805
_version_ 1784677906647089152
author Huang, Kuan-Ying
Woo, Eamor M.
Nagarajan, Selvaraj
author_facet Huang, Kuan-Ying
Woo, Eamor M.
Nagarajan, Selvaraj
author_sort Huang, Kuan-Ying
collection PubMed
description Amorphous poly(p-vinyl phenol) (PVPh) was added into semicrystalline poly(p-dioxanone) (PPDO) to induce a uniquely novel dendritic/ringed morphology. Polarized-light optical, atomic-force and scanning electron microscopy (POM, AFM, and SEM) techniques were used to observe the crystal arrangement of a uniquely peculiar cactus-like dendritic PPDO spherulite, with periodic ring bands not continuingly circular such as those conventional types reported in the literature, but discrete and detached to self-assemble on each of the branches of the lobs. Correlations and responsible mechanisms for the formation of this peculiar banded-dendritic structure were analyzed. The periodic bands on the top surface and interior of each of the cactus-like lobs were discussed. The banded pattern was composed of feather-like lamellae in random fractals alternately varying their orientations from the radial direction to the tangential one. The tail ends of lamellae at the growth front spawned nucleation cites for new branches; in cycles, the feather-like lamellae self-divided into multiple branches following the Fibonacci sequence to fill the ever-expanding space with the increase of the radius. The branching fractals in the sequence and the periodic ring-banded assembly on each of the segregated lobs of cactus-like dendrites were the key characteristics leading to the formation of this unique dendritic/ringed PPDO spherulite.
format Online
Article
Text
id pubmed-8963038
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-89630382022-03-30 Unique Periodic Rings Composed of Fractal-Growth Dendritic Branching in Poly(p-dioxanone) Huang, Kuan-Ying Woo, Eamor M. Nagarajan, Selvaraj Polymers (Basel) Article Amorphous poly(p-vinyl phenol) (PVPh) was added into semicrystalline poly(p-dioxanone) (PPDO) to induce a uniquely novel dendritic/ringed morphology. Polarized-light optical, atomic-force and scanning electron microscopy (POM, AFM, and SEM) techniques were used to observe the crystal arrangement of a uniquely peculiar cactus-like dendritic PPDO spherulite, with periodic ring bands not continuingly circular such as those conventional types reported in the literature, but discrete and detached to self-assemble on each of the branches of the lobs. Correlations and responsible mechanisms for the formation of this peculiar banded-dendritic structure were analyzed. The periodic bands on the top surface and interior of each of the cactus-like lobs were discussed. The banded pattern was composed of feather-like lamellae in random fractals alternately varying their orientations from the radial direction to the tangential one. The tail ends of lamellae at the growth front spawned nucleation cites for new branches; in cycles, the feather-like lamellae self-divided into multiple branches following the Fibonacci sequence to fill the ever-expanding space with the increase of the radius. The branching fractals in the sequence and the periodic ring-banded assembly on each of the segregated lobs of cactus-like dendrites were the key characteristics leading to the formation of this unique dendritic/ringed PPDO spherulite. MDPI 2022-02-19 /pmc/articles/PMC8963038/ /pubmed/35215718 http://dx.doi.org/10.3390/polym14040805 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Huang, Kuan-Ying
Woo, Eamor M.
Nagarajan, Selvaraj
Unique Periodic Rings Composed of Fractal-Growth Dendritic Branching in Poly(p-dioxanone)
title Unique Periodic Rings Composed of Fractal-Growth Dendritic Branching in Poly(p-dioxanone)
title_full Unique Periodic Rings Composed of Fractal-Growth Dendritic Branching in Poly(p-dioxanone)
title_fullStr Unique Periodic Rings Composed of Fractal-Growth Dendritic Branching in Poly(p-dioxanone)
title_full_unstemmed Unique Periodic Rings Composed of Fractal-Growth Dendritic Branching in Poly(p-dioxanone)
title_short Unique Periodic Rings Composed of Fractal-Growth Dendritic Branching in Poly(p-dioxanone)
title_sort unique periodic rings composed of fractal-growth dendritic branching in poly(p-dioxanone)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8963038/
https://www.ncbi.nlm.nih.gov/pubmed/35215718
http://dx.doi.org/10.3390/polym14040805
work_keys_str_mv AT huangkuanying uniqueperiodicringscomposedoffractalgrowthdendriticbranchinginpolypdioxanone
AT wooeamorm uniqueperiodicringscomposedoffractalgrowthdendriticbranchinginpolypdioxanone
AT nagarajanselvaraj uniqueperiodicringscomposedoffractalgrowthdendriticbranchinginpolypdioxanone