Effects of addition of functionalized SEBS on rheological, mechanical, and tribological properties of polyamide 6 nanocomposites

• Published in: Polymer engineering and science Vol. 50; no. 1; pp. 100 - 112
• Main Authors: Nishitani, Yosuke, Yamada, Yoshinao, Ishii, Chiharu, Sekiguchi, Isamu, Kitano, Takeshi
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.01.2010; Wiley; Blackwell Publishing Ltd
• Subjects: Applied sciences; Composites; Copolymers; Exact sciences and technology; Forms of application and semi-finished materials; Grafting; Impact tests; Mechanical properties; Nanocomposites; Polyamide resins; Polymer blends; Polymer industry, paints, wood; Polymer processing; Rheological properties; Technology of polymers; Tension tests; Tribology; Viscoelasticity; Substituent effect; Viscoelasticity; Clay; Polymer blends; Molten state; Amino group; SEBS; Mechanical properties; Thermoplastic rubber; Dispersion reinforced material; Tensile property; Organic anhydride; Experimental study; Functional polymer; Composite material; Amide 6 polymer; Triblock copolymer; Impact strength; Aliphatic polymer; Concentration effect; Carboxyl group; Nanocomposite; Rheological properties; Tribology
• ISSN: 0032-3888; 1548-2634
• DOI: 10.1002/pen.21516

The effects of the addition of styrene‐ethylene/butylene‐styrene copolymer (SEBS) with various functionalized groups on the rheological, mechanical, and tribological properties on polyamide 6 nanocomposite filled with layered silicate (PA6/Clay) were investigated. Four types of SEBS: unmodified SEBS (SEBS), maleic anhydride grafted SEBS (SEBS‐g‐MA), amine group grafted SEBS (SEBS‐g‐NH2), and carboxyl group grafted SEBS (SEBS‐g‐COOH) were added with PA6/Clay nanocomposite to prepare various polymer blends. These polymer blends were extruded by a twin screw extruder and injection molded. Dynamic viscoelastic properties of these blends in the molten state and their tensile, impact, and tribological properties were evaluated. The viscoelastic properties were found to increase with the addition of SEBS and were highly influenced by the types of functionalized groups contained. Influence of the addition of SEBS on the mechanical properties of these systems differed for each mechanical property. Although the tensile properties decreased with SEBS, Izod impact properties improved with the addition of various functionalized SEBS. These mechanical properties and viscoelastic properties correlated closely with the size of dispersed SEBS particles and interparticle distance. The tribological properties also improved with the addition of SEBS, and the influence of the amount added was higher than the type of SEBS used. POLYM. ENG. SCI., 2010. © 2009 Society of Plastics Engineers