Rheological properties of isotactic polypropylene/kaolin composites
Rheological properties of isotactic polypropylene/kaolin composites have been evaluated at kaolin concentrations 0-17.4 vol% at 493K. The systems obeyed power-law model in shear stress-shear rate variations and were shear thinning, which increased with kaolin content. Apparent melt viscosity decreas...
| Main Authors: | , , |
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| Format: | Article |
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Informa UK Limited
2002
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| Online Access: | http://psasir.upm.edu.my/id/eprint/115467/ |
| Summary: | Rheological properties of isotactic polypropylene/kaolin composites have been evaluated at kaolin concentrations 0-17.4 vol% at 493K. The systems obeyed power-law model in shear stress-shear rate variations and were shear thinning, which increased with kaolin content. Apparent melt viscosity decreased up to 5% kaolin and increased with further increase in kaolin concentration. First normal stress difference increased up to 5 vol% kaolin and decreased beyond this kaolin content. Use of a titanate coupling agent modified the rheological properties through an enhanced bonding between the filler and the polymer. |
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