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Polycarbonate/molybdenum disulfide/carbon black composites: Physicomechanical, thermal, wear, and morphological properties
Author(s) -
Basavaraj E.,
Ramaraj B.
Publication year - 2012
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.22179
Subject(s) - materials science , composite material , scanning electron microscope , ultimate tensile strength , molybdenum disulfide , polycarbonate , dynamic mechanical analysis , lubricant , differential scanning calorimetry , carbon black , glass transition , polymer , natural rubber , physics , thermodynamics
To investigate the influence of molybdenum disulfide (MoS 2 ) as solid lubricant and filler on the polycarbonate (PC) and carbon black (CB) composites, PC containing one weight percentage of CB powder was compounded and extruded with 0.5, 1.0, 2.0, and 3.0 weight percentage of MoS 2 powder in a co‐rotating twin screw extruder. Thus, the fabricated PC/CB/MoS 2 composites were characterized for physicomechanical properties such as density, void content, surface hardness, tensile behaviors, and impact strength. The thermal characteristics of the composites have been studied by differential scanning calorimetry and dynamic mechanical analysis (DMA). The effect of MoS 2 content, loads and sliding distances on wear characteristics of the composites were evaluated using pin‐on‐disc equipment. It was found that wear, friction, and laser etching resistance of PC/CB/MoS 2 composites increased with increase in MoS 2 content along with improvement in tensile and impact strengths. DMA analysis indicates the storage modulus of PC/CB/MoS 2 composites increased with increase in MoS 2 content below the glass transition temperature ( T g ) of PC. Worn surfaces and laser etched surfaces were examined with scanning electron microscopy and optical microcopy respectively to have better insight of the wear and laser etching mechanism. It was observed that the MoS 2 as solid lubricant played major role in improving resistance to wear, friction, and laser etching. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers