Preparation and properties of reinforced SEBS‐based thermoplastic elastomers modified by PA6

Abstract

SEBS-based thermoplastic elastomers modified by PA6 with maleic anhydride grafted copolymer (SEBS-g-MAH or PP-g-MAH) as the compatibilizer were prepared, and the effects of compatibilizer and PA6 on the mechanical and surface properties of blends were investigated in detail. The dosage ratio of SEBSg-MAH to PA6 at 3:5 is an optimal combination for improving mechanical properties. The maleic anhydride of SEBS-g-MAH can react with the terminal amine of PA6 to form the SEBS-g-PA6 graft copolymer as a bridge at the phase interface. With the increase of PA6, a typical sea-island structure gradually appears in the matrix, and when PA6 is 15 phr, the tensile strength and ultimate elongation both reach the maximum of 18.58 MPa and 1097%, and the corresponding wear rate is only 54.4% of that before modification. Furthermore, the addition of PA6 also significantly reduced the contact angle of the blends to below 90 , transforming the hydrophobic surface into a hydrophilic surface. These outcomes provide an effective strategy for reinforcing and modifying the surface properties of thermoplastic elastomers and benefit the development of SEBS in industrial applications.

Do descarte ao reaproveitamento do resíduo de estireno-butadieno (SBRr): produção de compostos de PA6/SBRr compatibilizados com SEBS-MA e reforçados com argila montmorilonita

“…A reometria de torque é uma análise importante para monitorar evidências de reações químicas e processabilidade das misturas poliméricas à base de poliamida 6 (Bassani et al, 2002;Yan et al, 2013). A PA6 possui funcionalidade inerente por meio dos grupos terminais aminas, o que a torna um polímero excelente para reações de enxertia durante o processamento no estado fundido (Gao et al, 2022;Zhao et al, 2020). Copolímeros funcionalizados com anidrido maleico têm sido apresentados como compatibilizantes efetivos para misturas de PA6, já que os grupos anidridos maleico são capazes de reagir com os grupos terminais amina da PA6 (Luna et al, 2022b;Wu et al, 2015).…”

Strategies for Improving Sustainability in the Development of High-Performance Styrenic Block Copolymers by Developing Blends with Cellulose Derivatives

“…As representative examples, the introduction of inorganic fillers ranging from clay [ 18 ], graphite [ 19 ], and carbon black [ 20 ] to multiwalled carbon nanotubes [ 16 ] allow the tuning of mechanical and electrical properties, depending on filler type and content. SEBS-based blends with organic compounds of synthetic origin, such as polyamide 6 (PA) [ 21 , 22 ] and polystyrene matrices [ 23 ], result in the improvement of impact strength, tensile strength and Young’s modulus, respectively. Further, SEBS has been also used as a compatibilizing agent in polymer blends.…”

Enhanced Compatibility, Morphology, and Low-Temperature Toughness of Polyamide 6/Poly(dimethylsiloxane)/Epoxidized Silicone Rubber Composites

“…Therefore, elastomers must be altered to strengthen their adhesion to PA6 and increase the composite’s notch impact strength. Currently, the most popular method for toughening PA6 involves the addition of active groups, such as maleic anhydride, − and epoxy groups − to rubber elastomers, which then react with PA6 terminal amino or carboxyl groups to produce block or graft copolymers and compatibilize in situ.…”