Modification of Natural Rubber Latex by Graft Copolymerization of 2-Ethylhexyl Acrylate and Methacrylic Acid  

作　　者：Xueyuan Wang Fanglian Yao Jie Su Xin Zhang Xiaolei Tong Zhihui Qin Caideng Yuan 

机构地区：[1]School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China

出　　处：《Transactions of Tianjin University》2020年第4期314-323,共10页天津大学学报（英文版）

摘　　要：Natural rubber(NR)grafted with 2-ethylhexyl acrylate(2-EHA)and methacrylic acid(MAA,collectively NR-g-PEHA/MAA)was synthesized by emulsion polymerization.Tetraethylenepentamine and cumene hydroperoxide were used as redox initiators.The successful grafting of 2-EHA and MAA onto NR was confirmed by Fourier transform infrared spectroscopy.The morphology of the NR latex particles was observed by transmission electron microscopy.The effects of reaction temperature,initiator dosage,feeding mode,and hard monomer content on the mechanical properties of the modified NR film were investigated.Grafted polymer chains were unevenly wrapped on the outside of NR particles,and smaller particles were more easily grafted.Crosslinking was characterized using a toluene swelling method.Thermal stability and glass transition temperature were examined by differential scanning calorimetry and thermogravimetric analysis.The results showed that the thermal stability of NR-g-PEHA/MAA had been improved,and the glass transition temperature(Tg)was unchanged.

关 键 词：Natural rubber latex Graft copolymerization CROSSLINKING ACRYLATE AZIRIDINE 

分 类 号：TQ332[化学工程—橡胶工业]