Preparation And Properties Of Wear-resisting, Flexible SBS Elastomer Materials For Shoes

SBS is one kind of important thermoplastic elastomer(TPE), It is widely used as sole materials of leather shoes, gym shoes and travel shoes. SBS has become one of main raw materials of sole materials for lots of merits such as: low weight density, being comfortable, anti-wetslides, and no rubber's unique odor, and waste materials may be recycled, and so on. Oiled SBS has worse wear-resisting performance used as shoe soles. The flexibility and wear-resisting performance are two important targets when regarding SBS as the shoe sole material. If we consider only enhancing the flexibility, the wear-resisting performance of oiled SBS will be reduced. Therefore, it has become an important research topic to prepare SBS shoe sole materials with flexibility and wear-resisting performance together.This paper selects the different polymer modifier and filler to modify SBS on the base of oiling SBS. The tensile properties, flexibility (degree of hardness) and wear-resisting performance were researched. The relations between the modified system's mechanical properties and micro-structure were also exposed. Main research contents and results as follows:1. The mechanical properties of the blends, such as tensile strength at break, elongation at break, tensile strength, permanent tensile deformation, flexibility and wear-resisting performance are studied. The relations between mechanical properties and PS, filler(CaCO₃,nano-CaCO₃,SiO₂,nano-SiO₂) contents as well as master batch blending are obtained. By analyzing theoretical and experimental data, we discovered that the mechanical properties is superior when PS content was up to 15wt% in SBS/PS binary blends, it can increase the tensile and wear-resisting properties, decrease slightly flexibility. The ordinary filler(CaCO₃,SiO₂) decrease tensile property and flexibility of SBS/PS binary blends. The mechanical properties is superior when nano-filler(nano-CaCO₃,nano-SiO₂)content was 1wt% in SBS/PS binary blends, it can increase the tensile and wear-resisting properties. The master batch blending can further improve mechanical properties of SBS/PS/nano-CaCO3 ternary blends.2. The mechanical properties of the blends are studied. The relations between mechanical properties and EVA, nano-filler(nano-CaCO₃,nano-SiO₂) contents as well as master batch blending are obtained. By analyzing theoretical and experimental data, we discovered that the mechanical properties is superior when EVA content was up to 15wt% in SBS/EVA binary blends, it can increase the tensile property and flexibility, decrease wear-resisting performance. The mechanical properties are superior when nano-filler content was 1wt% in SBS/EVA binary blends, it can increase the tensile and wear-resisting properties. In comparison, the mechanical properties are better of SBS/EVA/nano-CaCO₃ ternary blends. The master batch blending can further improve mechanical properties of SBS/EVA/nano-CaCO₃ ternary blends.3. The mechanical properties of the blends are studied on the base of 1 and 2. The relations between mechanical properties and BR, P83 as well as nano-CaCO₃ contents are obtained. It is also studied the effect of each kind modifier contents on the mechanical properties used the abrasion and nano-filler disperser SEM microphotographs. By analyzing theoretical and experimental data, we discovered that the mechanical properties is superior when the SBS/BR proportion is 90/10 in SBS/PS/BR/nano-CaCO₃ quarternary blends, it can further increase the wear-resisting performance and flexibility. The mechanical properties are superior when P83 content was 10wt% in SBS/P83 binary blends, it can increase flexibility and wear-resisting performance. Both of two modified materials have better flexibility and wear-resisting performance.