文献类型：期刊文献

中文题名：Thermal degradation of epoxidized natural rubber in presence of neodymium stearate

英文题名：Thermal degradation of epoxidized natural rubber in presence of neodymium stearate

作者：Luo Yongyue[1];Yang Changjin[1];Chen Bangqian[2];Xu Kui[1];Zhong Jieping[3];Peng Zheng[1];Lu Zhen[1];Wang Qinghuang[1]

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

年份：2013

卷号：31

期号：5

起止页码：526

中文期刊名：稀土学报：英文版

外文期刊名：JOURNAL OF RARE EARTHS

收录：SCI-EXPANDED(收录号：WOS:000322378400016)、CSTPCD、、EI(收录号：20132516438755)、Scopus(收录号：2-s2.0-84879010584)、WOS、CSCD、CSCD2013_2014

基金：Project supported by National Program on Key Basic Research Project of China (973 Program, 2010CB635109) and Ministry of Science and Technology R & D Research Institutes (2008EG134285)

语种：英文

中文关键词：环氧化天然橡胶;热降解;硬脂酸;傅里叶变换红外光谱;热氧化降解;FTIR-ATR;热氧化稳定性;钕

外文关键词：neodymium stearate; ENR25; thermal degradation; thermo-oxidative degradation; kinetic; rare earths

中文摘要：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.

外文摘要：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.