双-(β-酮萘胺)镍(II)/B(C6F5)3/AlEt3体系催化醋酸降冰片烯酯聚合及结构表征

采用双-(β-酮萘胺)镍(II)/B(C6F5)3/AlEt3体系在甲苯溶剂中进行了降冰片烯衍生物醋酸降冰片烯酯的聚合，研究了聚合温度和聚合时间对聚合的影响。通过1H NMR、13C NMR、FT-IR、DSC及WAXD技术对聚合物的结构和性能进行了研究。证明双-(β-酮萘胺)镍(II)/B(C6F5)3/AlEt3体系催化醋酸降冰片烯酯按乙烯基加成聚合方式进行的，聚合物分子量中等和分子量分布较窄。所得聚合产物为非晶态，具有短程有序长程无序的特征，热稳定性较好，并能够溶解在大部分普通有机溶剂中。

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

Polymerizations of 5-norbornene-2-yl-acetate were catalyzed by a new late transition metal complex catalytic system based on bis-(β-ketonaphthylamino) nickel(II)/B(C6F5)3/AlEt3. The influences of polymerization conditions such as polymerization temperature and polymerization time were investigated. The obtained polymers were characterized by proton and carbon nuclear magnetic resonance, Fourier-transform infrared spectroscopy, differential scanning calorimetry, and wide-angle X-ray diffraction. The structure analysis of the polymers demonstrated that the above catalytic system initiated 5-norbornene-2-yl-acetate polymerization to yield vinyl polymers with moderate molecular weights. The produced products exhibit non-crystallinity but short-range order and long-range disorder, better thermal stability and are soluble in many common solvents.