| The effect of the raw material and process control on SBR tensile properties during the production of raw rubber SBR is described in the paper. We did a survey from August2012to August2013in the tensile stress at300%elongation, tensile strength and the elongation at break of SBR (SBR-1500E and SBR-1502E) produced in a starting period as well as the raw materials, additives and process control parameters in the same period Through comparison, it is found that the purity of raw materials, the content of acid soup in rubber, the additives content in emulsion, the content of styrene combined with raw rubber and the Mooney viscosity play a key role in the tensile property of SBR.As a result, in order to obtain SBR rubbers with stable tensile property and reliable quality, it is necessary to control the contents of vinyl acetylene and the total alkynes in butadiene (<20mg/kg), the lighter compositions in recovered butadiene (≤5.0%), mixed butadiene (≥97.0%), mixed styrene (>98.0%), organic acids in SBR-1500E (5.6～5.8%), organic acids in SBR-1502E (5.5to5.7%), dry substance in water (2.80～2.90%) combinated styrene content in rubber latex (23.2～23.6%), Mooney viscosity of SBR-1500E (51-52), Mooney viscosity of SBR-1502E (49to50). |
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