摘要：

The filler network percolation behavior, filler-filler contact/bond and filler-polymer interaction of carbon black (CB) filled HNBR were investigated with the combination of dielectric and mechanical properties, by means of changing CB concentration, CB specific surface area, cycling deformation for vulcanizates, and rotation speed of rotors in internal mixer during mixing process. Dielectric relaxation spectrometer (DRS) was used to determine the percolation threshold of CB network, which was made up of filler-filler contact, combined with the percolation theory. The results showed that the percolation threshold of filler network increased with the increase rotation speed and the decrease of CB specific surface area. It indicated that the filler-filler contact was affected by increasing rotation speed to some degree. Cycling deformation did not affect the percolation threshold obviously. It meant the filler-filler contact was not affected by cycling deformation obviously. However, the filler-polymer interaction was weakened by this procedure, according to careful investigation for the variation of some mechanical properties. We found new interesting correlations between the macroscopic mechanical properties and CB concentration. The molecular nature of these findings was discussed, combined with the “overlap model” and traditional “molecular slip theory”.

 

 

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个人简介：

Prof.Dr.Zhao Shugao, educated in Shandong Institute of Chemical Technology, South China University of Technology, Shanghai Jiaotong University and University of Erlangen-Nürnberg(Germany), now is Dean of Rubber Engineering Institue in Qingdao University of Science and Technology, Director of Key Lab of Rubber-Plastics(QUST), Ministry of Education, China. He also works as the Standing Director of China Rubber Industry Association, vice-chairman of Rubber Division of Chinese chemical society, Chairman of Rubber Division of Shandong chemical society. His research area is rubber materials and processing, mainly focused on the structures, properties, modification, processing, application of rubber materials and structures and properties controling in processing.