Influence of addition of styrene–ethylene/butylene–styrene copolymer on rheological, mechanical, and tribological properties of polyamide nanocomposites

Abstract

To develop new tribomaterials for mechanical sliding parts, investigations were carried out on the influence of adding styrene–ethylene/butylene–styrene block copolymer (SEBS) on the rheological, mechanical, and tribological properties of polyamide 6 (PA6) nanocomposite, which is a commercial product of layered silicate (clay) filled polyamide 6 (PA6/Clay). Two kinds of block copolymers, unmodified SEBS (SEBS) and maleic anhydride‐grafted SEBS (SEBS‐g‐MA), were added with PA6/Clay nanocomposite. Dynamic viscoelastic properties in the molten state of these nanocomposites and their tensile, impact, and tribological properties of these nanocomposites were evaluated. Dynamic viscoelastic properties were found to increase with the addition of SEBS and were influenced, in particular, by block copolymers containing SEBS‐g‐MA. Influence of the addition of SEBS on mechanical properties of these systems differed for each mechanical property. Although tensile properties decreased with SEBS, Izod impact properties were improved with the addition of SEBS‐g‐MA. Tribological properties were improved with the addition of block copolymer, and the influence of the amount of addition was higher than the type of block copolymer used. These results indicate that new tribomaterials developed have sufficient balance amongst moldability, mechanical, and tribological properties. POLYM. COMPOS., 2010. © 2009 Society of Plastics Engineers

Thermomechanical and Rheological Behaviours of Waste Glass Fibre-Filled Polypropylene Composites

“…That could be attributed to the fact that the fibre rigidity or flexibility was slightly reflected in G' and G" at low fibre content. This phenomenon is also found in other composite systems, such as polyamide fibre reinforced polypropylene, and polyvinyl alcohol fibre reinforced polypropylene [17], [18]. Additionally, both storage modulus and loss modulus of the composite with 5wt% of MA-PP were higher than those of the composite with 2wt% of MA-PP and that of the composite without MA-PP.…”

“…These values are quantitatively measured to evaluate the fluidity of the materials, i.e. the fluidity of the material is enhanced with increasing activation energy [17], [19]. The Ea is not constant for filled systems; however, it depends on the volume fraction of solid [20].…”

Influences of compatibilizers on rheology and mechanical properties of propylene random copolymer/styrene‐ethylene‐butylene‐styrene block copolymer/organic‐montmorillonite nanocomposites

“…Hence, ternary PNCs comprising polymer, SEBS and filler are designed for overcoming the shortages of reinforcement using inorganic filler and toughening using thermoplastic elastomer solely. SEBS and SEBS‐ g ‐MA have been used to modify viscoelasticity of polyamide 6/OMMT PNCs 19. It is noted that iPP‐ g ‐MA is frequently used to control the selective locations of OMMT in one, or another of the polymers or at the iPP‐SEBS interface,20,21 leading to a slight increase in notched impact toughness, stiffness, and strength as compared with iPP/SEBS blend 22…”

“…SEBS and SEBS-g-MA have been used to modify viscoelasticity of polyamide 6/OMMT PNCs. 19 It is noted that iPP-g-MA is frequently used to control the selective locations of OMMT in one, or another of the polymers or at the iPP-SEBS interface, 20,21 leading to a slight increase in notched impact toughness, stiffness, and strength as compared with iPP/SEBS blend. 22 Since, compatibilizer is an important factor in determining the dispersion of OMMT layers, it is necessary to understand the effects of various compatibilizers with different molecular structures on PNCs.…”

Effect of chain extender and terpolymers on tensile and fracture properties of polyamide 6

“…On the other hand, lack of compatibility between rubber phase and matrix may cause a reduction on elongation at break regardless of toughness improvement. In other words, surprisingly rubber incorporation into the PA6 matrix can increase toughness while decreasing strain rate which obtained from tensile tests [25][26][27][28].…”