Effect of incorporated CdS nanoparticles on the crystallinity and morphology of poly(styrene-b-ethylene oxide) diblock copolymers

Siao Wei Yeh, W. U. Tzung-Luen, Kung Hwa Wei, Y. A.Sen Sun, Keng S. Liang

研究成果: 雜誌貢獻期刊論文同行評審

25 引文 斯高帕斯(Scopus)

摘要

Surface-modified CdS nanoparticles selectively dispersed in hexagonally packed poly(ethylene oxide) (PEO) cylinders of poly(styrene-b-ethylene oxide) (PSEO) block copolymers were prepared. The photoluminescence and ultraviolet-visible characteristics of the presynthesized CdS nanoparticles in N,N-dimethylformamide and in PEO domains of the PSEO block copolymers were determined. Because of strong interactions between the CdS nanoparticles and PEO chains, as shown by Fourier transform infrared spectroscopy, the incorporation of the CdS nanoparticles prevented the PEO cylinders from properly crystallizing; this was confirmed by differential scanning calorimetry and wide-angle X-ray diffraction measurements. The intercylinder distance between the swollen and reduced-crystallinity CdS/PEO cylinders in turn increased, as confirmed by small-angle X-ray scattering and transmission electron microscopy. At a high CdS concentration (43 wt % or 8.3 vol % with respect to PEO), however, the hexagonally packed cylindrical nanostructure of the PSEO diblock copolymers was destroyed.

原文???core.languages.en_GB???
頁(從 - 到)1220-1229
頁數10
期刊Journal of Polymer Science, Part B: Polymer Physics
43
發行號10
DOIs
出版狀態已出版 - 15 5月 2005

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