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標題: Morphology and electrical properties of carbon-black-filled poly(epsilon-caprolactone)/poly(vinyl butyral) nanocomposites
作者: Wu, T.M.
Cheng, J.C.
關鍵字: nanocomposites;morphology;spherulite;positive-temperature-coefficient;polymer blends;conductive composites;polyethylene;percolation;design
Project: Journal of Applied Polymer Science
期刊/報告no:: Journal of Applied Polymer Science, Volume 88, Issue 4, Page(s) 1022-1031.
The morphology of poly(epsilon-caprolactone) (PCL)/poly(vinyl butyral) (PVB)/clay nanocomposites was studied as a function of a small amount of amorphous PVB by polarized optical microscopy. The band spacings of PCL spherulites in PCL/PVB/clay nanocomposites decreased with increasing PVB content, and this indicated that increasing the PVB content shortened the period of lamellar twisting. The electrical properties of PCL/PVB/clay nanocomposites containing carbon black (CB) were also measured as a function of the PVB content. For samples with the same CB content, the intensity of the positive temperature coefficient (defined as the ratio of the peak resistivity to the resistivity at room temperature) of the nanocomposites increased as the PVB content increased. The change in the positive temperature coefficient was related to the morphological differences (i.e., the period of lamellar twisting) in the nanocomposites. (C) 2003 Wiley Periodicals, Inc.
ISSN: 0021-8995
DOI: 10.1002/app.11766
Appears in Collections:材料科學與工程學系

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