文献类型： 外文期刊
作者： Luo Yongyue 1 ; Yang Changjin 1 ; Chen Bangqian 2 ; Xu Kui 1 ; Zhong Jieping 3 ; Peng Zheng 1 ; Lu Zhen 1 ; Wang Qinghuan 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Chinese Agr Minist Key Lab Trop Crop Prod Proc, Agr Prod Proc Res Inst, Zhanjiang 524001, Peoples R China
2.Chinese Acad Trop Agr Sci, Rubber Res Inst, Danzhou 571737, Peoples R China
3.Guangdong Ocean Univ, Sch Sci, Zhanjiang 524088, Peoples R China
关键词： neodymium stearate;ENR25;thermal degradation;thermo-oxidative degradation;kinetic;rare earths
期刊名称：JOURNAL OF RARE EARTHS （ 影响因子：3.712； 五年影响因子：3.326 ）
ISSN： 1002-0721
年卷期： 2013 年 31 卷 5 期
页码：
收录情况： SCI
摘要： The effect of neodymium stearate (NdSt) synthesized by saponification method on thermal degradation and thermo-oxidative degradation of expoxidized natural rubber with 25 mol.% epoxidation (ENR25) was investigated by thermogravimetric analysis (TGA), and the structure of ENR25 vulcanized with NdSt after thermo-oxidative decomposition was characterized using Fourier transform infared spectroscopy-attenuated total-reflectance (FTIR-ATR). The thermal degradation kinetic parameters of ENR25 with different loadings of NdSt were determined by Coats-Redfern method. The results showed that the thermal degradation of ENR25 in nitrogen was a one-step reaction regardless of NdSt content, whereas the thermo-oxidative degradation was a multiple-step reaction. The thermal and thermo-oxidative stability of the ENR25 vulcanizates with the addition of NdSt was higher than that of pure ENR25 vulcanizates. The ENR25 vulcanizates with the incorporation of 1 phr (per hundred parts of rubber) NdSt imparted the highest activation energy (E) of thermal and thermo-oxidative degradation. This could be attributed to the many unoccupied orbits in rare earth Nd, which could capture the free radicals and make the epoxide groups stable in the process of thermal and thermo-oxidative degradation for ENR25.
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