Melt extrudate swell behavior of multi-walled carbon nanotubes filled-polypropylene composites
| Autor: | Chak Yin Tang, C.Y. Chen, T.Y. Zhou, Chi Pong Tsui, Vesna Mišković-Stanković, W.F. Huang, Ji-Zhao Liang, S.Y. Zou |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Polymers and Plastics Polypropylene composites 02 engineering and technology General Chemistry Carbon nanotube Die swell 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention law Materials Chemistry Ceramics and Composites Composite material 0210 nano-technology |
| Zdroj: | Polymer Composites |
| ISSN: | 0272-8397 |
| Popis: | The extrudate swell behavior of polypropylene (PP) composite melts filled with multi-walled carbon nanotubes (MWCNTs) was studied using a capillary rheometer in a temperature range from 190 to 230 degrees C and at various apparent shear rates varying from 50 to 800 s(-1). It was found that the values of the extrudate swell ratio of the composites increased nonlinearly with increasing apparent shear rates, while the values of the extrudate swell ratio decreased almost linearly with increasing temperature. The values of the melt extrudate swell ratio increased approximately linearly with increasing shear stress, while decreased approximately nonlinearly with an increase of the MWCNT weight fraction. In addition, the extrudate swell mechanisms were discussed with observation of the fracture surface of the extrudate using a scanning electronic microscopy. This study provides a basis for further development of MWCNTs reinforced polymer composites with desirable mechanical and thermal properties. |
| Databáze: | OpenAIRE |
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