Surface Modification of Steel Slag and Its Application in Compounded Rubber
SHEN Haiyang1, WANG Zhengzhou1, 2
1 School of Materials Science and Engineering, Tongji University, Shanghai 201804; 2 Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804
Abstract: The influence of steel slag on curing characteristics and mechanical properties of a compounded rubber i.e. natural rubber, styrene-butadiene rubber and butadiene rubber was studied. The results show that the addition of steel slag can promote the vulcanization of the compounded rubber by shortened the scorch time (t10) and curing time (t90). Addition of an appropriate amount of steel slag (10 phr) leads to an increase in the tensile strength and elongation at break of the compounded rubber. As the amount of steel slag further increased, the tensile strength and elongation at break of the compounded rubber decreased gradually, whereas the hardness and volume fraction of abrasion of compounded rubber increased. Compared with the compounded rubber without steel slag filled,the t10 and t90 of KH-550 modified steel slag filled compounded rubber decreased; the t10 and t90 of the compounded rubber with Si-69 and CS-105 modified steel slag improved. The tensile strength and the elongation at break of the compounded rubber filled with the modified steel slag increased and the volume fraction of abrasion decreased compared with the compounded rubber filled with the unmodified steel slag. The SEM results elaborate that the compatibility of modified steel slag and compounded rubber is improved.
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2018, Vol. 32 
