Preparation and characterization of PP/clay nanocomposites based on modified polypropylene and clay
| Autor: | Wen-Faa Kuo, Jeng-Yue Wu, Gwo-Yang Chang, Shih-Jung Tsai, Tzong-Ming Wu, Wei-Yan Chen |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Polypropylene
Nanocomposite Materials science Polymers and Plastics Nucleation Crystal growth Dynamic mechanical analysis Condensed Matter Physics law.invention chemistry.chemical_compound Differential scanning calorimetry Montmorillonite chemistry Chemical engineering law Polymer chemistry Materials Chemistry Physical and Theoretical Chemistry Crystallization |
| Zdroj: | Journal of Polymer Science Part B: Polymer Physics. 43:3242-3254 |
| ISSN: | 1099-0488 0887-6266 |
| DOI: | 10.1002/polb.20605 |
| Popis: | X-ray diffraction and differential scanning calorimeter (DSC) methods have been used to investigate the crystallization behavior and crystalline structure of hexamethylenediamine (HMDA)-modified maleic-anhydride-grafted polypropylene/clay (PP-g-MA/clay) nanocomposites. These nanocomposites have been prepared by using HMDA to graft the PP-g-MA (designated as PP-g-HMA) and then mixing the PP-g-HMA polymer in hot xylene solution, with the organically modified montmorillonite. Both X-ray diffraction data and transmission electron microscopy images of PP-g-HMA/clay nanocomposites indicate that most of the swellable silicate layers are exfoliated and randomly dispersed into PP-g-HMA matrix. DSC isothermal results revealed that introducing 5 wt % of clay into the PP-g-HMA structure causes strongly heterogeneous nucleation, which induced a change of the crystal growth process from a three-dimensional crystal growth to a two-dimensional spherulitic growth. Mechanical properties of PP-g-HMA/clay nanocomposites performed by dynamic mechanical analysis show significant improvements in the storage modulus when compared to neat PP-g-HMA. © 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 43: 3242–3254, 2005 |
| Databáze: | OpenAIRE |
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