Interfacial friction damping characteristics in MWNT-filled polycarbonate composites

doi:10.1007/s11706-009-0040-1

Front Mater Sci Chin

2009, Vol. 3

Issue (3) : 266-272 https://doi.org/10.1007/s11706-009-0040-1

RESEARCH ARTICLE

Interfacial friction damping characteristics in MWNT-filled polycarbonate composites

Yu-hong MAN, Zheng-cao LI, Zheng-jun ZHANG(

)

Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

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Abstract

The effects of strain, temperature, test frequency, and multi-walled nanotube (MWNT) weight percentage on the interfacial sliding at the tube-polymer interfaces were investigated by dynamic mechanical tests. The storage modulus first increased slightly then reached a plateau and finally decreased sharply with further increasing strain (temperature, frequency) amplitude. Moreover, the changing of the storage modulus of the nanocomposite lagged the loss modulus as a function of strain (temperature, frequency). Furthermore, with the increase of MWNT weight percentage interfacial slip was activated at relative smaller strain, lower temperature, or lower frequency. The possible influence of polymer wrapping carbon nanotubes in the interfacial area on interfacial friction was introduced.

Keywords carbon nanotube polycarbonate damping interfacial friction

Corresponding Author(s): ZHANG Zheng-jun,Email:zjzhang@tsinghua.edu.cn

Issue Date: 05 September 2009

Cite this article:

Zheng-cao LI,Zheng-jun ZHANG,Yu-hong MAN. Interfacial friction damping characteristics in MWNT-filled polycarbonate composites[J]. Front Mater Sci Chin, 2009, 3(3): 266-272.

URL:

https://academic.hep.com.cn/foms/EN/10.1007/s11706-009-0040-1
https://academic.hep.com.cn/foms/EN/Y2009/V3/I3/266

Fig.1 Representative SEM image of the fracture surface of 6 wt.% MWCNT-polycarbonate composite. The insert of the enlarged image showing uniform distribution of nanotubes on the fracture surface. TEM image of 4 wt.% MWCNT-polycarbonate composite.

Fig.2 Storage modulus as a function of strain for nanocomposites and the pure polycarbonate. Loss modulus as a function of strain for nanocomposites and the pure polycarbonate. All the tests were performed at room temperature and the test frequency was constant at 1 Hz.

Fig.3 Plot of and , and , and and as a function of nanotube concentration. The entire parameters have been defined in the text.

Fig.4 Storage modulus of the nanocomposite and pure polycarbonate as a function of temperature. Loss modulus of the nanocomposite and pure polycarbonate as a function of temperature. The test strain is constant at 0.1% and the test frequency is constant at 1 Hz.

Fig.5 Plot of the storage and loss modulus as a function of the test frequency for nanotube weight ratio of 0.1%, 0.5%, 2%, and 4%. All the tests were performed at room temperature and the test strain was constant at 0.1%.

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