Transfer of semicrystalline polymers sliding against a smooth steel surface

Tanaka, Kyuichiro

doi:10.1016/0043-1648(82)90147-8

Cited by 93 publications

(28 citation statements)

References 6 publications

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“…Because of their hardness, toughness, and friction properties, polyamides (PA) are used for gear and bearing materials. 2 For these applications, carbon, copper compounds (e.g., CuO), or glass fibers as filler components and poly(tetrafluoroethylene) (PTFE) or MoS 2 as solid lubricants have been added to PA. [3][4][5][6] The former improves mainly the mechanical strength and wear resistance of polymers, whereas the latter improves friction characteristics and contributes to the control of wear. 1,7 Nylons are semicrystalline and their crystallinity can be modified by decreasing cooling rates during the thermal molding 8 and by the addition of a nucleating agent such as fumed silica or aluminum.…”

Section: Introductionmentioning

confidence: 99%

“…The excellent heat-transfer characteristics of the metallic counterpart contribute to this film formation during frictional processes in almost all polymers with viscoelastic properties. 6,12 The wear of spherulitic nylon is preceded by interfacial frictional heating and subsequent removal of the material and transfer to the counterface as well. Therefore, the wear resistance of nylon is attributed to its ability to form thin films while sliding against a steel counterpart.…”

Section: Introductionmentioning

confidence: 99%

“…14 The tribological behavior of polyamide and their composites has been reported previously. 6,15 Polyamide has superior wearresistance sliding against a steel counterface relative to other polymers. Factors that exert influence on friction and wear characteristics of polymer composites are the particle size, morphology, and concentration of the filler.…”

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confidence: 99%

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Friction and wear studies on nylon‐6/SiO₂ nanocomposites

Garcı́a

Rooij

Winnubst

et al. 2004

J of Applied Polymer Sci

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ABSTRACT:Composites of nanometer-sized silica (SiO 2 ) filler incorporated in nylon-6 polymer were prepared by compression molding. Their friction and wear properties were investigated on a pin on disk tribometer by running a flat pin of steel against a composite disc. The morphologies of the composites as well as of the wear track were observed by scanning electron microscopy (SEM). The addition of 2 wt % SiO 2 resulted in a friction reduction () from 0.5 to 0.18 when compared with neat nylon-6. This low silica loading led to a reduction in wear rate by a factor of 140, whereas the influence of higher silica loadings was less pronounced. The smooth morphology obtained after the wear test indicated the negligible contribution to friction of the pin to the nanocomposite

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Friction and wear studies on nylon‐6/SiO₂ nanocomposites

Garcı́a

Rooij

Winnubst

et al. 2004

J of Applied Polymer Sci

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“…Their use can reduce the maintenance costs, too. Several studies on the tribological behaviour of the most common engineering plastics [polyamides (PA) [3], polyoxymethylene (POM) [4] and polyethylene terephtalate with polytetrafluoroethylene (PET/ PTFE) [5] in contact with steel have been published and compared by, e.g., Tanaka [6], Evans and Senior [7], Guezmil et al [8] and Kalácska [1]. Polymers as viscoelastic materials are greatly sensitive to the heat of friction.…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity of plasma modified polyethylene terephthalate and polyamide-6 layers

Kalácska¹,

Keresztes

Foldi³

et al. 2016

Express Polym. Lett.

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Abstract. Tribological performance of the materials greatly depends on the temperature of the contacting zones and surfaces and hence on the heat conducting behaviour of the materials. Heat conduction of polymers is, however, greatly affected even by a very narrow (few tens of nm) modified layer formed on the surface after subjecting the polymer to plasma treatment. In this article the heat flow inhibiting properties of plasma modified surface layers were investigated on polyethylene terephthalate (PET) and polyamide-6 (PA6) engineering polymers. Nitrogen Plasma Immersion Ion Implantation gave rise to compositional and structural changes of the polymers in a depth of 110 nm. It was found that even this thin layer exhibited significant heat flow inhibiting effect. The modified layer considerably decreased the thermal conductivity coefficient of the treated polymer and resulted in a reduced heat transmission for PET and PA6 by 33 and 28%, respectively. This new information supports and is in accordance with the former tribological results about extra friction heat generation experienced under NPIII surface layer of PA6 and PET during dry sliding.

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“…There have been also a number of investigations exploring the influence of test conditions, contact geometry and environment on the friction and wear behavior of polymers and composites. Watanabe [12], Tanaka [13] and Bahadur and Tabor [14] reported that the tribological behavior of polyamide, high density polyethylene (HDPE) and their composites is greatly affected by normal load, sliding speed and temperature. Pihtili and Tosun [15,16] showed that applied load and sliding speed play significant role on the wear behavior of polymer and composites.…”

Section: Introductionmentioning

confidence: 99%