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”.

___________________________________

 

个人简介：

赵树高教授，工学博士、博士生导师，曾在山东化工学院、华南理工大学、上海交通大学、德国Erlangen-Nürnberg大学学习，现任青岛科技大学橡胶工程研究院院长、橡塑材料与工程教育部重点实验室（青岛科技大学）主任；兼任中国橡胶工业协会常务理事、中国化学化工学会橡胶专业委员会副主任委员、山东化学化工学会橡胶专业委员会主任委员。主要研究方向是橡胶材料及其加工技术，着重研究橡校材料的结构、性能、改性、加工、应用以及加工过程中材料结构与性能控制.