tailieunhanh - Review: Natural rubber – Improvement of properties

The article will be focused on methods of chemical modification of NR and the use of improved traditional fillers such as carbon black (CB) and silica. Modification reactions include epoxidation, hydrogenation, and grafting vinyl monomers onto NR molecules. Some methods of surface modification of NR film were also reviewed. Thanks to modification the NR degree of unsaturatiton is decrease that leads to its enhanced aging resistance. | Cite this paper Vietnam J. Chem. 2023 61 3 269-283 Review article DOI Review Natural rubber Improvement of properties Tran Vinh Dieu1 Bui Chuong1 Dang Viet Hung1 Nguyen Huy Tung1 Nguyen Pham Duy Linh1 Doan Thi Yen Oanh2 1 Hanoi University of Science and Technology 1 Dai Co Viet Hai Ba Trung Hanoi 10000 Viet Nam 2 Publishing House for Science and Technology Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Cau Giay Hanoi 10000 Viet Nam Submitted December 11 2022 Revised February 7 2023 Accepted March 20 2023 Abstract Natural rubber NR is valuable material of natural origination with growing demand worldwide. Thus the methods for NR property improvement are continuously developed. The article will be focused on methods of chemical modification of NR and the use of improved traditional fillers such as carbon black CB and silica. Modification reactions include epoxidation hydrogenation and grafting vinyl monomers onto NR molecules. Some methods of surface modification of NR film were also reviewed. Thanks to modification the NR degree of unsaturatiton is decrease that leads to its enhanced aging resistance. Besides grafted functional groups may impart new never met before properties to NR. Application of modified traditional fillers obviously increase their reinforcement possibility particularly mechanical. Also cellulose as a potential reinforcing filler is considered due to its ability to meet requirement of environment protection while keep the mechanical properties of NR products at acceptable high level. Keywords. Natural rubber modification carbon black silica cellulose. ABBREVIATION AAm Acrylamide. CB Carbon black. CNT Carbon nanotube. CSDPF Carbon-silica dual phase filler. DVB Divinyl benzene. DAAm Diacetone acrylamide. 2-EHA 2-Ethylhexyl acrylate. IPN Interpenetrating network. MMA Methyl methacrylate. NR Natural rubber DPNR Deproteinized NR ENR Epoxidized NR. NRL NR latex LNR Liquid NR LENR Liquid ENR HNR Hydrogenated NR. PS