文献类型：期刊文献

英文题名：Polyethylene-b-poly(ethylene/1-octene) Block Copolymer Prepared via Novel Dinuclear FI/Nickel(II) α-Diiminecatalytic Systems

作者：Zhang, Yixin[1]; Wang, Mengxue[1]; Zhang, Zheyuan[1]; Mi, Puke[1]; Wang, Tinglan[1]

机构：[1] Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2017

卷号：38

期号：8

起止页码：1497

外文期刊名：Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities

收录：EI(收录号：20173504103882)

语种：英文

外文关键词：Catalysts - Nickel compounds - Nuclear magnetic resonance - Organic solvents - Block copolymers - Ethylene - Zirconium - Differential scanning calorimetry - Fourier transform infrared spectroscopy - Polyethylenes

摘要：A novel dinuclear phenoxyimine zirconium catalyst(CatB) was synthesized and constituted catalytic system with nickel(II) α-diimine catalyst(CatA). The catalytic system was used for the preparation of polyethylene-b-poly( ethylene/1-octene) copolymer in the presence of co-catalyst(MAO) and chain shuttling agent diethylzinc(ZnEt2). Polymer structure was characterized by differential scanning calorimetry(DSC), Fourier transform infrared spectrophotometer(FTIR) and carbon nuclear magnetic resonance(13C NMR). The results showed that under the same condition: toluene as solvent, pressure 1.0 MPa, temperature 50℃, n(MAO)/n(CatA+CatB)=300:1, c(1-octene)=0.58 mol/L, the insert amount of 1-octene on copolymer was 4.9%. The DSC curve presented bimodal profile and the "soft" segment of the products was more concentrated. ? 2017, Higher Education Press. All right reserved.