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

Eamor Woo, Graecia Lugito, Ya Ting Hsieh, Siti Nurkhamidah

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 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 languageEnglish
Title of host publication5th Nanoscience and Nanotechnology Symposium, NNS 2013
PublisherAmerican Institute of Physics Inc.
Pages7-13
Number of pages7
ISBN (Print)9780735412187
DOIs
Publication statusPublished - 2014 Jan 1
Event5th Nanoscience and Nanotechnology Symposium, NNS 2013 - Surabaya, Indonesia
Duration: 2013 Oct 232013 Oct 25

Publication series

NameAIP Conference Proceedings
Volume1586
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other5th Nanoscience and Nanotechnology Symposium, NNS 2013
CountryIndonesia
CitySurabaya
Period13-10-2313-10-25

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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