Abstract
Polypropylene-layered silicate nanocomposites consisting of three components-pure polypropylene, maleated polypropylene, and organically modified silicate-were prepared by the melt-intercalation method to investigate melt-extensional properties such as melt strength, neck-in test, and orientation behavior. The nanocomposites showed an enhanced tensile modulus, enhanced storage modulus, much enhanced melt tension, and reduced neck-in during the melt processing as compared with neat polymer. The uniaxial drawing induced the silicate surface to align parallel to the sheet surface. The c and a* axes of the polypropylene crystals were bimodally oriented to the flow direction, and the b axes were oriented to the thickness direction. The bimodal orientation of the polypropylene crystal was enhanced with the concentration of silicates.
| Original language | English |
|---|---|
| Pages (from-to) | 158-167 |
| Number of pages | 10 |
| Journal | Journal of Polymer Science, Part B: Polymer Physics |
| Volume | 43 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2005 Jan 15 |
| Externally published | Yes |
Keywords
- Clay
- Melt tension
- Nanocomposites
- Neck-in test
- Orientation
- Poly(propylene) (PP)
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Polymers and Plastics
- Materials Chemistry