Morphology, thermal behavior, and mechanical properties of PA6/UHMWPE blends with HDPE-g-MAH as a compatibilizing agent

Abstract

A functionalized high-density polyethylene (HDPE) with maleic anhydride (MAH) was prepared using a reactive extruding method. This copolymer was used as a compatibilizer of blends of polyamide 6 (PA6) and ultrahigh molecular weight polyethylene (UHMWPE). Morphologies were examined by a scanning electron microscope. It was found that the dimension of UHMWPE and HDPE domains in the PA6 matrix decreased dramatically, compared with that of the uncompatibilized blending system. The size of the UHMWPE domains was reduced from 35 m (PA6/UHMWPE, 80/20) to less than 4 m (PA6/UHMWPE/HDPE-g-MAH, 80/20/20). The tensile strength and Izod impact strength of PA6/UHMWPE/HDPE-g-MAH (80/20/20) were 1.5 and 1.6 times as high as those of PA6/UHMWPE (80/20), respectively. This behavior could be attributed to chemical reactions between the anhydride groups of HDPE-g-MAH and the terminal amino groups of PA6 in PA6/UHMWPE/HDPE-g-MAH blends. Thermal analysis was performed to confirm that the above chemical reactions took place during the blending process.

Tribological behaviours of PA/UHMWPE blend under dry and lubricating condition

“…The compatibilizer: HDPE-g-MAH was prepared in our laboratory by reactive grafting technology in an SHJ-30 reactive mode co-rotating twin-screw extruder with L/D = 44 and D = 30 mm; the processing conditions were the following as reported elsewhere [8]. The ternary PA6/UHM-WPE/HDPEg-MAH blend was prepared by re-active blending of the components.…”

“…The extrudate were quenched in a water bath, pelletized and dried at 80 • C for 16 h, then fed into an extruder to inject into a mould to obtain the PA6/UHMWPE6 blend bar with a diameter of 10 mm. The mechanical and thermal properties were reported elsewhere [8]. The comparison materials were: commercial UHMWPE (Mw = 2.5 × 10 6 ) in the form of 25 mm diameter rod; PA6 in the form of 10 mm diameter rod.…”

“…UHMWPE possesses excellent self-lubrication properties and high impact resistance and high chemical stability, however, its low deformation temperature and difficult to mould also limit its wide engineering applications. The blend of PA and UHMWPE (PA/UHMWPE) can overcome the shortcomings of both polymers and at the same time, perhaps retaining good mechanical properties [8]. As a new kind of material, the blend of PA and UHMWPE, thus, offers strong potential in the field of lubricated sliding application.…”

Oil and thermal aging resistance in compatibilized and thermally stabilized chlorinated polyethylene/natural rubber blends

“…Similar to the measurement of oil resistance, the changes in tensile strength after thermal aging were used to determine thermal aging resistance. ROYALTUF 490, Uniroyal Co., Inc., USA 2,2 0 -dicyclopentyl-bis (4-methyl-6-tert-butyl-phenol) 22 CP 46, Lowi Co., Ltd., Thailand Dicumyl peroxide (DCP) (98% active DCP) Percumyl D/Chemmin Co., Ltd., Thailand Osmium tetroxide (OsO 4 ) BecThai Co., Ltd., Thailand Table 2 Compound formulation used …”

Effect of Compatibilization on Reciprocating Frictional Behavior of Polyamide 66/UHMWPE Blends

“…Therefore, its engineering applications are limited (Kurtz,et al (4)). The blend of PA66 and UHMWPE (PA/UHMWPE) can hopefully overcome the shortcomings of both polymers while retaining their good mechanical properties, so that it would offer a strong potential to apply in the field of the self-lubricating sliding parts (Liu,et al ((5)-(7); Yao, et al (8), (9)). …”