Thermal, mechanical and tribological properties of polycarbonate/acrylonitrile-butadiene-styrene blends

Abstract

Polycarbonate (PC) and acrylonitrile-butadienestyrene (ABS) were blended by varying ABS content. The thermal, mechanical and tribological properties of the PC/ ABS blends were systematically characterized. Increasing ABS content in the PC/ABS blends decreased thermal stability of the blends, as a result of the lower thermal stability of the ABS than that of the PC. Although the tensile strength of the PC/ABS blends apparently decreased with increased ABS content, the PC/ABS blend with 10 wt% of ABS had the highest tensile strength, because of improved processability of the blend. The friction and wear of the ABS measured against a steel ball of 6 mm in diameter were higher than those of the PC. As a result, a higher ABS content in the PC/ABS blends resulted in higher friction and wear of the blends. The scratch results showed that scratching with a 5 mm steel ball generated a scratch with a shorter length and lower depth on the PC than on the ABS, which indicated better scratch resistance of the PC. Therefore, the PC/ABS blend with 50 wt% of PC had better scratch resistance than the ABS, due to the influence of the PC embedded in the blend.

Self-Lubricating and Wear Resistant Epoxy Composites Incorporated With Microencapsulated Wax

“…However, the mean friction coefficients of the epoxy composites slid under the higher normal load of 6 N are slightly lower than those of the ones tested under the lower normal load of 3 N because the higher wear of the epoxy composites associated with the higher normal load releases more wax lubricant for the effective self-lubricating of the composites during the sliding. The promoted wear of the epoxy composites causes their surface roughening so that the uneven surfaces of the composites keep and sustainably release the wax lubricant to lubricate the rubbing surfaces during the sliding [23][24][25][26][27][28]. At the same time, the promoted surface roughening and produced wear debris help to reduce the friction of the epoxy composites by lessening the contact between the rubbing surfaces.…”

“…8(a) the worn surface of the epoxy slid at a sliding speed of 3 cm/s under a normal load of 3 N is relatively smoother than its untested surface, which is indicative of the formation of tribolayers on the wear track during the sliding. The removal of surface materials as platelets is found in the center of the wear track where the contact pressure is highest [27,28]. During the wear test, the repeated sliding of the steel ball under the high normal load induces cyclic stress concentration in front of the steel ball, which in turn causes surface fatigue [27,28].…”

“…The removal of surface materials as platelets is found in the center of the wear track where the contact pressure is highest [27,28]. During the wear test, the repeated sliding of the steel ball under the high normal load induces cyclic stress concentration in front of the steel ball, which in turn causes surface fatigue [27,28]. The surface fatigue initiates minute cracks in the subsurface and propagates the cracks parallel to a free surface for some extent and eventually results in the removal of materials as platelets that can be clearly seen in the center of the wear track ( Fig.…”

Short Carbon Fiber-Reinforced Epoxy Tribomaterials Self-Lubricated by Wax Containing Microcapsules

“…Polymer composites have been greatly interested for tribological applications, since the specific development of polymer composites based on conventional polymers can achieve desired properties even with a small amount of fillers [3][4][5][6]. The wear resistance of polymer composites has been improved by reinforcements and solid/liquid lubricants [7].…”

Multifunctional polymeric composites with wear-resistant, toughening, and self-healing features

“…This is because the specific development of polymer composites based on conventional polymers can obtain new materials with new structural and functional properties, being superior to their neat matrices [5][6][7][8][9]. In addition, polymer composites can achieve the outstanding multifunctional properties such as thermal, optical, electrical, mechanical, and tribological properties encountered only with a small quantity of fillers incorporated in polymer matrix.…”