Surface and interior views on origins of two types of banded spherulites in poly(nonamethylene terephthalate)

Eamor Woo, Siti Nurkhamidah, Yu Fan Chen

研究成果: Article同行評審

24 引文 斯高帕斯(Scopus)

摘要

Top-surface and three-dimensional views of Type-1 and Type-2 of ring-banded spherulites in poly(nonamethylene terephthalate) (PNT) in thicker bulk crystallized on a nucleating potassium bromide (KBr) substrate were examined using various microscopy techniques: scanning electron microscopy (SEM), polarized-optical microscopy (POM), and atomic-force microscopy (AFM). In PNT crystallized at higher crystallization temperature (T c) with heterogeneous nucleating substrate, typically two types of ring-banded spherulites are present that differ significantly in patterns and ring spacings: Type-1 Type-2 (single- and double-ring-banded spherulites). Three-dimensional view on fractured spherulites in bulk PNT samples reveals that the single-ring-banded spherulite (Type-1) tends to be well-rounded spheres as they are nucleated homogeneously from bulk; the double-ring-banded spherulite (Type-2) is concentric hemisphere or truncated sphere shells owing to be nucleated from bottom. With confined thickness of films, the 3-D hemispheres in PNT may become truncated into multi-shell annular cones or arcs when thickness or growth is restricted. Based on the top-surface vs. interior views of banded lamellar assembly, origins and inner structures of dual types of ring bands in PNT were examined in greater details. This journal is

原文English
頁(從 - 到)17841-17851
頁數11
期刊Physical Chemistry Chemical Physics
13
發行號39
DOIs
出版狀態Published - 2011 十月 21

All Science Journal Classification (ASJC) codes

  • 物理與天文學 (全部)
  • 物理與理論化學

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