Effect of CBC and G-POSS on Tribological Behaviour of Polyamide 6 and Short Glass Fiber Reinforced Polyamide 6 Composites

Abstract

In this study, eect of glycidylisobutyl oligomeric silsesquioxane (G-POSS) and 1.1 -carbonyl-bis-caprolactam (CBC) (1 wt.%) on the friction and wear performance of polyamide 6 (PA6) and short glass ber (SGF) (10 and 20 wt.%) reinforced PA6 composites were investigated. Adhesive wear tests were carried out by using a tribometer in block-on-ring conguration (ASTM G77), in sliding conditions, without lubricants and in air. Tests were carried out at sliding speed of 1.6 m/s (511 rpm) and applied load values of 25, 50 and 75 N. Wear rate was calculated using weight loss per unit sliding distance. The results showed that, the friction force increases with the increasing load. It was found that the wear resistance of PA6 improved considerably after doping with CBC.

Improvement of mechanical and wear resistance property by varying glass fiber contents and amino-silicate coupling agents on polyamide 612 composites

“…Furthermore, studies show that adding a 1.0wt% silane coupling agent to GF-reinforced PA612-based composite material considerably improves the mechanical strength of the composite material owing to the rise in fiber-matrix interface adhesion. 13,20,21…”

“…Furthermore, studies show that adding a 1.0wt% silane coupling agent to GF-reinforced PA612-based composite material considerably improves the mechanical strength of the composite material owing to the rise in fibermatrix interface adhesion. 13,20,21 Scanning electron microscopy observation Figure 8 shows SEM images of fracture surfaces of pure PA612 and its composites. For pure PA612, the wear tracks are noticeable in the sliding direction, and these tracks designate that the pure PA612 had adhesive wear.…”

“…Therefore, these molecules deed as a bridge between matrix and fiber and offer the required chemical bonds or polar interactions between fiber and matrix. 20,21 In this way, improved effective stress transfer and interfacial adhesion between matrix and fiber lead to enhanced tribological attributes, such as coefficient of friction and wear rate. [22][23][24][25][26][27][28][29][30][31][32][33] This study examined the effect of coupling agent addition on the crystallization behavior, adhesion and wear, mechanical properties, and thermal properties of glass fiber (GF) reinforced polyamide 612 (PA612) composites.…”

“…Therefore, these molecules deed as a bridge between matrix and fiber and offer the required chemical bonds or polar interactions between fiber and matrix. 20,21 In this way, improved effective stress transfer and interfacial adhesion between matrix and fiber lead to enhanced tribological attributes, such as coefficient of friction and wear rate. 22–33…”

Effect of amino silane coupling agent on crystallization behavior of polyamide 612/glass fiber composites

“…The amino silane coupling agent contains at least two functional groups, wherein the amino functional group reacts with the functional group on PA612 and the other alkyl functional group reacts with the functional group on the GF surface. Coupling agents can be regarded as a class of substances with reactive molecules that act as a bridge between the substrate and the fibers, providing the required chemical bonds or polar interactions, thereby improving the adhesion of the substrate [16][17][18][19][20].…”