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Citation: CHEN Mu-Qing, HE Xiao-Hui, CHEN Yi-Wang, ZHOU Wei-Hua, SHI Ling, HE Fu-Ping, WU Qing. Polymerization of 5-Norbornene-2-yl-acetate Catalyzed by Bis-(β-ketonaphthylamino) Nickel(Ⅱ)/B(C₆F₅)₃/AlEt₃ Catalytic System[J]. Chinese Journal of Applied Chemistry, ;2009, 26(8): 923-928. shu

Polymerization of 5-Norbornene-2-yl-acetate Catalyzed by Bis-(β-ketonaphthylamino) Nickel(Ⅱ)/B(C₆F₅)₃/AlEt₃ Catalytic System

1.
a Institute of Polymers, Nanchang University, Nanchang 330031;
2.
b Institute of Polymer Science, School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou

Corresponding author: CHEN Yi-Wang,
Received Date: 9 August 2008
Available Online: 17 November 2008
Fund Project: 国家自然科学基金(50663002) (50663002)江西省自然科学基金(2007GZC1727) (2007GZC1727)江西省教育厅基金(Ganjiaojizi200713)资助项目 (Ganjiaojizi200713)

Polymerizations of 5-norbornene-2-yl-acetate in toluene were catalyzed by a new late transition metal complex catalytic system based on bis-(β-ketonaphthylamino) nickel(Ⅱ)/B(C₆F₅)₃/AlEt₃.The above catalytic system can polymerize 5-norbornene-2-yl-acetate effectly in a range of 20~90 ℃ and produced poly(5-norbornene-2-yl-acetate)s with moderate molecular mass(M_w=7.0×103~3.1×10⁴ g/mol) and relative narrow molecular mass distributions(M_w/M_n=1.8~2.0).The obtained polymers were characterized by proton and carbon nuclear magnetic resonance,Fourier-transform infrared spectroscopy,differential scanning calorimetry,thermogravimetric analysis and wide-angle X-ray diffraction.Analyses of nuclear magnetic resonance and Fourier-transform infrared spectroscopy indicate that the obtained polymers are vinyl-addition poly(5-norbornene-2-yl-acetate)s,and demonstrate that the above catalytic system initiated 5-norbornene-2-yl-acetate polymerization according to the vinyl-addition mode.Wide-angle X-ray diffraction analysis result shows that poly(5-norbornene-2-yl-acetate) exhibits non-crystallinity but short-range order and long-range disorder,the interchain distance of the polymer is 1.24 nm.The polymer has a better thermal stability(T_s>330 ℃) and is soluble in many common solvents.
- Ni complex catalyst,
- norbornene-yl-acetate,
- catalytic polymerization
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Polymerization of 5-Norbornene-2-yl-acetate Catalyzed by Bis-(β-ketonaphthylamino) Nickel(Ⅱ)/B(C6F5)3/AlEt3 Catalytic System

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通讯作者: 陈斌, bchen63@163.com

Polymerization of 5-Norbornene-2-yl-acetate Catalyzed by Bis-(β-ketonaphthylamino) Nickel(Ⅱ)/B(C₆F₅)₃/AlEt₃ Catalytic System