用二茚基稀土胺化物Ind2 LnN(i Pr) 2 (Ln =Y ,Yb)作为单组分催化剂催化丙烯腈聚合 ,研究了催化剂用量、单体浓度及聚合温度对标题化合物的催化活性和所得聚丙烯腈的分子量的影响。提高聚合发应温度可明显提高催化活性 ,当聚合温度达 5 0℃ ,单体浓度为 5 1mol·L- 1 ,催化剂用量为 0 3 % (摩尔分数 )时 ,其催化活性可达 64 %。外加添加剂PhONa ,其转化率和聚合物分子量都明显增大 ,当PhONa∶cat =3 ,其转化率可达 76% ,分子量达 1 3 2× 10 The catalytic activity, the concentration of the catalyst and the polymerization temperature on the catalytic activity of the title compound were studied by using the indenyl rare earth amine Ind2 LnN (i Pr) 2 (Ln = Y, Yb) as the single component catalyst for the polymerization of acrylonitrile. The molecular weight of polyacrylonitrile. When the polymerization temperature is up to 50 ℃, the monomer concentration is 5 1mol·L-1 and the amount of catalyst is 0 3% (mole fraction), the catalytic activity can be up to 64%. With the addition of PhONa, the conversion rate and the molecular weight of the polymer are obviously increased. When PhONa: cat = 3, the conversion is up to 76% and the molecular weight is up to 132 × 10