Unusual large-pitch banding in poly(L-lactic acid): Effects of composition and geometry confinement

Eamor M. Woo; Graecia Lugito; Ya Ting Hsieh; Siti Nurkhamidah

doi:10.1063/1.4866721

Unusual large-pitch banding in poly(L-lactic acid): Effects of composition and geometry confinement

Eamor M. Woo^*
, Graecia Lugito
, Ya Ting Hsieh
, Siti Nurkhamidah

^*Corresponding author for this work

National Cheng Kung University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Citations (Scopus)

Abstract

Lamellar patterns and orientations in blends of two crystalline polymers: poly(ethylene oxide) (PEO) and low-molecular-weight poly(L-lactic acid) (PLLA) were investigated using polarizing light optical microscopy (POM), and atomic and scanning electron microscopy (AFM, SEM). Specific etching off of PEO was used to reveal the complex earlier-grown PLLA lamellae patterns with various PEO content in blends. Banding of extremely long pitch (50 μm) in crystallized PLLA spherulites was induced by two kinetic factors: geometry confinement by top cover and introduction of diluent such as PEO. The mechanisms and correlation among the lamellar assembly, ring bands, and cracks are exemplified. Lamellar patterns and ring-band types in blends were found to vary with respect to not only blend compositions, but also confinement of top-cover.

Original language	English
Title of host publication	5th Nanoscience and Nanotechnology Symposium, NNS 2013
Publisher	American Institute of Physics Inc.
Pages	7-13
Number of pages	7
ISBN (Print)	9780735412187
DOIs	https://doi.org/10.1063/1.4866721
Publication status	Published - 2014
Event	5th Nanoscience and Nanotechnology Symposium, NNS 2013 - Surabaya, Indonesia Duration: 23 Oct 2013 → 25 Oct 2013

Publication series

Name	AIP Conference Proceedings
Volume	1586
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	5th Nanoscience and Nanotechnology Symposium, NNS 2013
Country/Territory	Indonesia
City	Surabaya
Period	23/10/13 → 25/10/13

Keywords

Growth confinement
Lamellae assembly
PEO
PLLA

Access to Document

10.1063/1.4866721

Cite this

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title = "Unusual large-pitch banding in poly(L-lactic acid): Effects of composition and geometry confinement",

abstract = "Lamellar patterns and orientations in blends of two crystalline polymers: poly(ethylene oxide) (PEO) and low-molecular-weight poly(L-lactic acid) (PLLA) were investigated using polarizing light optical microscopy (POM), and atomic and scanning electron microscopy (AFM, SEM). Specific etching off of PEO was used to reveal the complex earlier-grown PLLA lamellae patterns with various PEO content in blends. Banding of extremely long pitch (50 μm) in crystallized PLLA spherulites was induced by two kinetic factors: geometry confinement by top cover and introduction of diluent such as PEO. The mechanisms and correlation among the lamellar assembly, ring bands, and cracks are exemplified. Lamellar patterns and ring-band types in blends were found to vary with respect to not only blend compositions, but also confinement of top-cover.",

keywords = "Growth confinement, Lamellae assembly, PEO, PLLA",

author = "Woo, \{Eamor M.\} and Graecia Lugito and Hsieh, \{Ya Ting\} and Siti Nurkhamidah",

year = "2014",

doi = "10.1063/1.4866721",

language = "English",

isbn = "9780735412187",

series = "AIP Conference Proceedings",

publisher = "American Institute of Physics Inc.",

pages = "7--13",

booktitle = "5th Nanoscience and Nanotechnology Symposium, NNS 2013",

note = "5th Nanoscience and Nanotechnology Symposium, NNS 2013 ; Conference date: 23-10-2013 Through 25-10-2013",

}

Woo, EM, Lugito, G, Hsieh, YT & Nurkhamidah, S 2014, Unusual large-pitch banding in poly(L-lactic acid): Effects of composition and geometry confinement. in 5th Nanoscience and Nanotechnology Symposium, NNS 2013. AIP Conference Proceedings, vol. 1586, American Institute of Physics Inc., pp. 7-13, 5th Nanoscience and Nanotechnology Symposium, NNS 2013, Surabaya, Indonesia, 23/10/13. https://doi.org/10.1063/1.4866721

Unusual large-pitch banding in poly(L-lactic acid): Effects of composition and geometry confinement. / Woo, Eamor M.; Lugito, Graecia; Hsieh, Ya Ting et al.
5th Nanoscience and Nanotechnology Symposium, NNS 2013. American Institute of Physics Inc., 2014. p. 7-13 (AIP Conference Proceedings; Vol. 1586).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Unusual large-pitch banding in poly(L-lactic acid)

T2 - 5th Nanoscience and Nanotechnology Symposium, NNS 2013

AU - Woo, Eamor M.

AU - Lugito, Graecia

AU - Hsieh, Ya Ting

AU - Nurkhamidah, Siti

PY - 2014

Y1 - 2014

N2 - Lamellar patterns and orientations in blends of two crystalline polymers: poly(ethylene oxide) (PEO) and low-molecular-weight poly(L-lactic acid) (PLLA) were investigated using polarizing light optical microscopy (POM), and atomic and scanning electron microscopy (AFM, SEM). Specific etching off of PEO was used to reveal the complex earlier-grown PLLA lamellae patterns with various PEO content in blends. Banding of extremely long pitch (50 μm) in crystallized PLLA spherulites was induced by two kinetic factors: geometry confinement by top cover and introduction of diluent such as PEO. The mechanisms and correlation among the lamellar assembly, ring bands, and cracks are exemplified. Lamellar patterns and ring-band types in blends were found to vary with respect to not only blend compositions, but also confinement of top-cover.

AB - Lamellar patterns and orientations in blends of two crystalline polymers: poly(ethylene oxide) (PEO) and low-molecular-weight poly(L-lactic acid) (PLLA) were investigated using polarizing light optical microscopy (POM), and atomic and scanning electron microscopy (AFM, SEM). Specific etching off of PEO was used to reveal the complex earlier-grown PLLA lamellae patterns with various PEO content in blends. Banding of extremely long pitch (50 μm) in crystallized PLLA spherulites was induced by two kinetic factors: geometry confinement by top cover and introduction of diluent such as PEO. The mechanisms and correlation among the lamellar assembly, ring bands, and cracks are exemplified. Lamellar patterns and ring-band types in blends were found to vary with respect to not only blend compositions, but also confinement of top-cover.

KW - Growth confinement

KW - Lamellae assembly

KW - PEO

KW - PLLA

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U2 - 10.1063/1.4866721

DO - 10.1063/1.4866721

M3 - Conference contribution

AN - SCOPUS:84906501916

SN - 9780735412187

T3 - AIP Conference Proceedings

SP - 7

EP - 13

BT - 5th Nanoscience and Nanotechnology Symposium, NNS 2013

PB - American Institute of Physics Inc.

Y2 - 23 October 2013 through 25 October 2013

ER -

Unusual large-pitch banding in poly(L-lactic acid): Effects of composition and geometry confinement

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Keywords

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