Preparation and properties of high-strength-high-modulus polyimide cords/natural rubber composites |
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| Authors: | Xiaojun Hu Mengying Zhang Guohua Sun Wei Huang Hongqing Niu Dezhen Wu |
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| Affiliation: | 1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China;2. West Taihu, Jiangsu Shino New Materials Technology Co., Ltd, Changzhou, jiangsu, China;3. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China |
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| Abstract: | High-strength-high-modulus polyimide (PI) cords reinforced natural rubber (NR) composites are prepared, and the PI cords are treated with resorcinol-formaldehyde-latex (RFL) adhesive to enhance the interfacial adhesion with NR matrix. The influence of RFL adhesive variables, such as the ratio of R/F and RF/L, on the adhesion between PI cords and NR is investigated. Furthermore, sorbitol glycidyl ether (SGE) and caprolactam blocked methylene diisocyanate (CBI) are adhered to the surface of the PI cords through a dip-coating procedure to introduce epoxy and NCO groups and graft with more RFL adhesive. The H pull-out force of SGE/CBI-RFL treated PI cords/NR composites reaches as high as 193.9 N, which is 580% higher than that of untreated PI ones. Additionally, the SGE/CBI-RFL treated PI cords/NR composites exhibit superior adhesion, aging, and fatigue resistance together with better mechanical properties as compared with SGE/CBI-RFL treated poly(para-phenylene terephtalamide) (PPTA) cords/NR composites. |
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| Keywords: | polyimide cords rubber adhesives interface properties |
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