Effect of carbon nanotubes on the mechanical properties of polypropylene/wood flour composites: reinforcement mechanism

Song, Ping An and Yang, Hai-Tang and Fu, Shen-Yuan and Wu, Qiang and Ye, Jie-Wang and Lu, Feng-Zhu and Jin, Yong-Ming (2011) Effect of carbon nanotubes on the mechanical properties of polypropylene/wood flour composites: reinforcement mechanism. Journal of Macromolecular Science, Part B: Physics, 50 (5). pp. 907-921. ISSN 0022-2348

Abstract

Maleic anhydride grafted polypropylene (PP-g-MA) was employed as the compatibilizer and carbon nanotubes (CNTs) or hydroxylated CNTs as reinforcements for polypropylene/wood flour composites. The results showed that when the PP-g-MA loading level was 10 wt%, the bending strength, tensile strength, Izod notched impact strength, and elongation at break of PP-wood composites were enhanced by 85% (66.3 MPa), 93% (33.7 MPa), 5.8% (2.01 kJ/m 2), and 64% (23%), respectively, relative to the uncompatibilized composites. The introduction of pristine CNTs only improved slightly the overall mechanical properties of the compatibilized composites due to poor interfacial compatibility. Unlike CNTs, incorporating hydroxylated CNTs (CNT-OH) could significantly improve all of the mechanical properties; for instance, at 0.5 wt% CNT-OH loading, the flexural strength and tensile strength reached 68.5 MPa, and 40.4 MPa about 6.6% higher than that for the composites with the same CNT loading. Furthermore, CNT-OH also remarkably enhanced the storage modulus. Contact angle and morphology observations indicated that the increases in mechanical properties could be attributed to the improvements of interfacial interactions and adhesions of CNTs with the matrix and fillers.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 30 May 2017 05:43
Last Modified: 30 May 2017 05:43
Uncontrolled Keywords: carbon nanotubes, polypropylene, wood flour, mechanical properties, morphology, reinforcement mechanism
Fields of Research : 03 Chemical Sciences > 0305 Organic Chemistry > 030503 Organic Chemical Synthesis
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1080/00222348.2010.497063
URI: http://eprints.usq.edu.au/id/eprint/31651

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