Preparation, Structure And Properties Of CBF/Rubber Composites

To meet the demands for skeleton materials of upgrading rubber products, in this study, continuous basalt fiber(CBF), which is considered to be a new type of high-performance inorganic fiber, was introduced to rubber product field, and the adhesion between CBF cord and rubber matrix was investigated. To improve the interfacial properties between CBF cord and NR/SBR matrix, the cords were treated with coupling agent KH550 and resorcinol-formaldehyde-latex(RFL), separately. The effects of surface treatments on static adhesion and interfacial fatigue properties were discussed; the interfacial evolution of the adhesive properties between the CBF cord and the NR/SBR matrix was tracked, and the influence mechanism was discussed. The main contents of this thesis are listed below.1. The CBF cords were treated with coupling agent KH550 with a series of concentrations. The mechanical properties of the cords and the adhesion between cords and rubber matrix, including static adhesion and fatigue properties, were improved to varying degrees. The results show that the best performance was reached when the concentration of KH550 was 0.75%.2. The CBF cords were treated with RFL dipping systems with a series of R/F. The results show that RFL dipping can significantly improve the adhesion between CBF cord and rubber matrix. Along with the increase of F, the 3-D structure of RF resin became more complete. Within the R/F ratio from 1/1.0 to 1/3.0, the H pull-out force decreased, while the fatigue life firstly increased then decreased. The highest level of static adhesion was reached when R/F=1/1.0, while for fatigue life, the best ratio of R and F was 1/2.5.3. The CBF cords were treated with RFL dipping systems with a series of RF/L. The results show that, within the RF/L ratio from 1/5 to 1/12, along with the increase of L, the film-forming properties of RFL films became better and the modulus decreased first then increased; both the static adhesion and fatigue properties increased first then decreased. The highest level of static adhesion was reached when RF/L=1/8, while for fatigue life, the best ratio of RF and L was 1/10. Moreover, the relationship among the structure of RFL layer, H pull-out force and fatigue properties were investigated.