Dry sliding of composites with PBT matrix and micro glass beads on steel

Abstract

Purpose -This research aims to characterize the tribological behavior of polybutylene terephthalate (PBT) and PBT composites with micro glass beads (MGB) on steel, in dry conditions and on a block-on-ring tester, pointing out the influence of sliding distance and speed. The tribology of PBT and its composites is still in an early stage because this thermoplastic polyester requires accurate technological and thermal treatment. Design/methodology/approach -The composites were produced by ICEFS Savinesti Romania and contain PBT grade Crastin6130NC010 (as supplied by Du Pont), 0.5 [. . .] 1.0 per cent (weight) Relamyd B-2Nf (polyamide grade produced by ICEFS, for a better dispersion of MGB), 1 per cent (weight) black carbon for technological and tribological reasons and different micro glass beads (MGB) concentrations (10.0 and 20.0 per cent weight). Tests were done for different sliding distances (2,500, 5,000 and 7,500 m) and speeds (0.5, 1.0 and 1.5 m/s) and a normal load of 5 N. Findings -The friction coefficient and the wear parameter (as mass loss of polymeric blocks) pointed out a good tribological behavior for these composites. Scanning electron microscope (SEM) images revealed particular aspects of PBT local transfer on steel. Also, 10 per cent MGB in PBT reduces wear, especially for longer distances (75,000 m) and higher speeds (0.5 and 0.75 m/s); the friction coefficient is only slightly increased up to 0.23, being less influenced by the speed and the sliding distance as compared to neat polymer. Originality/value -PBT and PBT composites could become challengers for replacing materials in applications similar to tested ones. Even the neat polymer exhibits a good tribological behavior. The composites have a lower sensibility to higher speeds and sliding distances for the applied load.

Study of the abrasion resistance under scratching of polybutylenetereftalate–glass fiber composites

“…In contrast, the number of studies on the tribological performance of PBT composites is still limited in comparison [17][18][19][20][21]. In order to improve the tribological performance of PBT, the different strategies used have been either the addition of fibers, particles and nanophases [22,23] or the application of surface protective coatings [24,25].…”

Non-lubricated friction of polybutylene terephthalate (PBT) sliding against polyoxymethylene (POM)

“…The frictional properties of PBT and POM have been mostly investigated against steel counter surfaces [3,[8][9][10][11]. However, the tribological knowledge of these polymers in a polymer-polymer sliding contact is limited.…”

Fluorinated graphite reinforced polytetrafluoroethylene/poly(butylene terephthalate) composites as friction materials for deep‐sea applications

“…The friction and wear performance of PBT have been investigated mostly under dry friction. 8,9 It is generally accepted that the neat PBT matrix is damaged mainly by adhesive wear initiated by frictional heat generated due to asperity contact, leading to subsequent microcracking. 10,11 The reinforcement mechanism of fillers such as fibers, [12][13][14][15][16][17][18] metal oxides, [19][20][21] clays, 22 and carbon materials 23,24 ranging from the nanometer to micrometer scale have also been reported, and different types of composites have been developed.…”