Melt extrudate swell behavior of multi‐walled carbon nanotubes filled‐polypropylene composites. Issue 11 (11th October 2015)

• Record Type: Journal Article
• Authors: Liang, J.Z.; Chen, C.Y.; Zhou, T.Y.; Zou, S.Y.; Huang, W.F.; Tsui, C.P.; Tang, C.Y.; Mišković‐Stanković, Vesna
• Is Part Of: Polymer composites. Volume 38:Issue 11(2017)
• Page Start: 2433
• Page End: 2439
• Publication Date: 2015-10-11
• Subjects: Polymeric composites -- Periodicals; 620.192
• DOI: 10.1002/pc.23829
• Languages: English
• ISSNs: 0272-8397

Abstract

Abstract : 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°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. POLYM. COMPOS., 38:2433–2439, 2017. © 2015 Society of Plastics Engineers