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

doi:10.7503/cjcu20160957

Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (8): 1497.doi: 10.7503/cjcu20160957

• Polymer Chemistry • Previous Articles

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

ZHANG Yixin, WANG Mengxue, ZHANG Zheyuan, MI Puke, WANG Tinglan

Shanghai Key Laboratory of Advanced Polymeric Materials, 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

Received:2016-12-27 Revised:2017-07-11 Online:2017-08-10 Published:2017-07-11
Supported by:
Supported by the National Key R&D Program of China(No.2017YFB0306701) and the Project of Shanghai Key Disipline and Laboratory, China(Nos.B502, 08DZ2230500).

Abstract

Abstract:

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.

Key words: Block copolymer, Nickel(Ⅱ) α-diimine catalyst, Phenoxyimine zirconium catalyst, Chain shuttling polymerization

CLC Number:

O631.1

TrendMD:

ZHANG Yixin, WANG Mengxue, ZHANG Zheyuan, MI Puke, WANG Tinglan. Polyethylene-b-poly(ethylene/1-octene) Block Copolymer Prepared via Novel Dinuclear FI/Nickel(Ⅱ) α-Diiminecatalytic Systems[J]. Chem. J. Chinese Universities, 2017, 38(8): 1497.

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

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