Dynamic mechanical properties of polymer-lining and their effect on coefficient of friction

Abstract To obtain the dynamic and thermomechanical properties of polymer-lining and their effect on coefficient of friction (COF) between lining and wire rope, dynamic mechanical ana-lysis (DMA) and friction experiment were performed on the polymer-linings of GM-3 and K25. The effects of temperature and frequency on storage modulus (E1), loss modulus (E2), and loss factor (tanΔ) were obtained by DMA based on the theory of viscoelasticity. It was observed that the values of E1 increased with increasing frequency at−20–375 °C, while the values of E2 and tanΔ increased with frequency from Tg (glass-transition temperature) and reversed at higher temperature. Moreover, friction experiments were conducted on a special friction tester at different surrounding temperatures to measure COF of K25 and GM-3. It is found that the COF increases linearly with the loss factor, which can give good explanation for why COF increases with low sliding speed. Therefore, it is feasible and effective for increasing the loss factor or decreasing the storage modulus to improve polymer-lining's COF, which can also supply theoretical support for developing new lining with high tribological property.

[1]  I. Šics,et al.  Relationship between structure and dynamic mechanical properties of a carbon nanofiber reinforced elastomeric nanocomposite , 2006 .

[2]  L. Sperling.  Introduction to physical polymer science , 1986 .

[3]  Tongsheng Li,et al.  Tribological behaviors of several polymer–polymer sliding combinations under dry friction and oil-lubricated conditions , 2007 .

[4]  M. Felisberti,et al.  Dynamic mechanical spectroscopy applied to study the thermal and photodegradation of poly(2,6-dimethyl-1,4-phenylene oxide)/high impact polystyrene blends , 2004 .

[5]  Antonio Bello,et al.  Dynamic mechanical analysis of the two glass transitions in a thermotropic polymer , 2005 .

[6]  Roger Brown,et al.  Handbook of Polymer Testing : Physical Methods , 1999 .

[7]  G. Hinrichsen,et al.  Introduction to physical polymer science (2nd ed.). By L. H. Sperling, Lehigh University, Bethlehem, Pennsylvania. John Wiley & Sons, Inc., New York, 1992. , 1993 .

[8]  Sabu Thomas,et al.  Dynamic mechanical behavior of short coir fiber reinforced natural rubber composites , 2005 .

[9]  K. Lozano,et al.  Dynamic mechanical and thermal analysis of aligned vapor grown carbon nanofiber reinforced polyethylene , 2007 .

[10]  Tribological behavior of nanostructured WC particles/polymer coatings , 2007 .

[11]  N. Cheremisinoff.  Polymer Characterization: Laboratory Techniques and Analysis , 1996 .

[12]  R. Brereton,et al.  Dynamic mechanical analysis and chemometrics for polymer identification , 2007 .

[13]  Biqiong Chen,et al.  Mechanical and dynamic viscoelastic properties of hydroxyapatite reinforced poly(ε-caprolactone) , 2005 .

[14]  Lin Ye,et al.  Temperature-dependent elastic moduli of epoxies measured by DMA and their correlations to mechanical testing data , 2007 .

[15]  N S M El-Tayeb,et al.  The influence of roller burnishing process on hardness and roughness of cylindrical polymer surfaces , 2008 .

[16]  Shirong Ge,et al.  The friction coefficients between the steel rope and polymer lining in frictional hoisting , 1992 .

[17]  D. Lee,et al.  The tribological behavior of polymer coated carbon composites under dry and water lubricating conditions , 2007 .

[18]  R. Schirrer,et al.  Experimental and finite-element analysis of scratches on amorphous polymeric surfaces , 2008 .

[19]  N. K. Myshkin,et al.  Tribology of polymers: Adhesion, friction, wear, and mass-transfer , 2005 .

[20]  Sabu Thomas,et al.  Morphology, dynamic mechanical and thermal studies on poly(styrene-co-acrylonitrile) modified epoxy resin/glass fibre composites , 2007 .

[21]  W. Brostow,et al.  Effects of Surface Plasma Treatment on Tribology of Thermoplastic Polymers , 2008 .

[22]  Guoan Chen,et al.  Effect of Tension on Friction Coefficient Between Lining and Wire Rope with Low Speed Sliding , 2007 .

[23]  Experimental investigations on the dynamic mechanical properties of aged rubbers , 2004 .