Crystallization behavior of syndiotactic polystyrene nanocomposites for melt- and cold-crystallizations
| Autor: | Shoei-Chin Wu, Jeng-Jue Wu, Feng-Chih Chang, Chen-Rui Tseng |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Materials science
Nanocomposite Polymers and Plastics General Chemistry Surfaces Coatings and Films law.invention chemistry.chemical_compound Crystallinity Montmorillonite Differential scanning calorimetry chemistry law Tacticity Materials Chemistry Polystyrene Crystallization Fourier transform infrared spectroscopy Composite material |
| Zdroj: | Journal of Applied Polymer Science. 86:2492-2501 |
| ISSN: | 1097-4628 0021-8995 |
| DOI: | 10.1002/app.11020 |
| Popis: | 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 β-crystal from the α-crystal after being cold-crystallized because the clay plays a vital role in facilitating the formation of the thermodynamically favored β-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. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 2492–2501, 2002 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text