標題: Crystallization behavior of syndiotactic polystyrene nanocomposites for melt- and cold-crystallizations
作者: Tseng, CR
Wu, SC
Wu, JJ
Chang, FC
應用化學系
Department of Applied Chemistry
關鍵字: syndiotactic polystyrene (s-PS);clay;nanocomposites;surfactant;crystallization
公開日期: 5-Dec-2002
摘要: Analyses of the effects of montmorillonite (clay) on the crystallinity and crystallization behavior of syndiotactic polystyrene (s-PS) were investigated by Fourier transform infrared (FTIR) spectroscopy and differential scanning calorimetry (DSC). The dispersibility of the clay in s-PS nanocomposites was studied by X-ray and transmission electron microscopy (TEM). The clay was dispersed into the s-PS matrix by melt blending on a scale of 1-2 nm or few tenths-100 nm, depending on the surfactant treatment. On adding clay, the crystallization behavior of the s-PS tends to convert into the beta-crystal from the alpha-crystal after being cold-crystallized because the clay plays a vital role in facilitating the formation of the thermodynamically favored beta-form crystal when the s-PS is cold- or melt-crystallized. This phenomenon leads to a change in a conventional mechanism of molecular packing for the s-PS. Evidently, the clay significantly affects the crystallinity and crystallization behavior of the s-PS. (C) 2002 Wiley Periodicals, Inc.
URI: http://dx.doi.org/10.1002/app.11020
http://hdl.handle.net/11536/28318
ISSN: 0021-8995
DOI: 10.1002/app.11020
期刊: JOURNAL OF APPLIED POLYMER SCIENCE
Volume: 86
Issue: 10
起始頁: 2492
結束頁: 2501
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