Design, Preparation And Application Of New SSBR Nano-Filler Composite

We studied the styrene uniform distribution and vinyl in SSBR macromolecular chain, styrene content effect on performance of new SSBR, obtain guidance pilot production of basic data, then the better pilot product formula features. The process-structure-properties of the wet-mixing process were studied. It lays a theoretical foundation for the design and application of new types of rubber. The main research contents of this paper are as follows.In the first part, According to the molecular design new idea a several kinds of linear SSBR with different microstructure were designed and prepared. The effects of styrene (St) content, vinyl (Bv) content and the styrene uniform random distribution of SSBR on their integrated performance was studied. The results showed that with increasing styrene content, the glass transition temperature, compression fatigue temperature, tensile strength,0? tan?(wet skid resistance) and anti-aging properties of the SSBR compounds were increased, but there was a slight drop in tear strength and abrasion value. Styrene uniform random distribution in the molecular chain make the rebound value, wet skid resistance and carbon black dispersion of SSBR composite increase significantly, and the hardness and frictional heat reduce. With the Bv content increases, the mechanical properties of the rubber were little change, compression fatigue temperature was increased, wear and rebound value were reduced. SSBR with high vinyl content and styrene uniform random distribution significantly presented the high rebound value and significantly low 0? tan?, and 60? tan8. This shows that the styrene uniform random distribution could greatly increase the flexibility of SSBR molecular, make the high wet skid resistance and low rolling resistance get balance, It is novel structural design idea to improve SSBR performances.In the second part, The physical and dynamic mechanical properties of linear solution polymerized styrene butadiene rubber with different structure were studied. The change of styrene and vinyl content influence on the properties of rubber compound with the same test sample. In addition to the uniform distribution of styrene, the structure and production control of the pilot sample were more successful. The styrene content was controlled at about 25% and the vinyl content was controlled at about 60%, which was the best structure of SSBR in the green tire.In the third part, we studies the physical and dynamic mechanical properties of carbon black/silica-filled the styrene uniform random distribution of SSBR (H-SSBR), observes the microscopic distribution of the filler in vulcanized rubber, research on the preferred blend ratio of SiO2/CB which filled the different ratio of NR/H-SSBR rubber's performance. The results showed that with the ratio of SiO2/CB reduced, tensile strength, elongation at break, abrasion resistance, compression fatigue temperature and rolling resistance of the H-SSBR compounds were increased, wet skid resistance were reduced. The TEM photographs showed that SiO2/CB/H-SSBR composites showed CB and SiO2 particles formed the interweaving networks in the composite. When H-SSBR blend with NR, scorch and curing time of rubber were shorted, tensile strength, tear strength, elongation at break and compression fatigue temperature were increased, but there was a light drop in wear resistance, rolling resistance and wet skid resistance. H-SSBR blend with NR, it would have a better processing and using performance I n green tire tread.In the forth part, we studied the effects of the wet blending process and preparation conditions on the properties of wet blend compounds, determine suitable preparation processes and conditions, prepared good performance wet compounds. Studied the linear SSBR/carbon black blend compounds hardness,300% modulus, tensile strength, tear strength, compression fatigue temperature, wet skid resistance with dry blend compounds or less, but its wear resistance is better than dry blend compounds, wet blend compounds have higher rolling resistance. We studied the Sn-coupled SSBR/carbon black blend compounds hardness, tensile strength, elongation at break, wear with dry blend compounds or less, but its dynamic compression temperature and rolling resistance lower than dry blend compounds. Wet blend compounds was contain a lot of bound rubbers, strong shearing force can be increased bound rubber content of the blend compounds and carbon black in the rubber matrix dispersion.