丙烯酸十八酯在Nd(P_(204))_3-Al(i-Bu)_3催化剂体系中聚合的研究

THE POLYMERIZATION OF OCTADECYL ACRYLATE BY Nd(P_(204) )_3-Al(i-Bu)_3 CATALYTIC SYSTEM

研究了丙烯酸十八酯 (OA)在 Nd(P2 0 4 ) 3 - Al(i- Bu) 3 催化剂体系中的聚合反应 ,反应的最佳条件是 :以苯为溶剂 ,[Al]/[Nd]=9(摩尔比 ) ,[OA]/[Nd]=16 2 (摩尔比 ) ,6 0℃反应 6 h,聚合转化率大于 90 % ,所得聚合物的分子量为 1.0× 10 5～ 1.5× 10 5。聚合反应速率与单体浓度、催化剂浓度均呈一级关系 ,聚合反应的表观活化能为 32 .5k

The polymerization of octadecyl acrylate with Nd(P 204 ) 3 Al(i Bu) 3 catalytic system in benzene have been studied. The best conditions are [Al]/[Nd]=9(molar ratio), [OA]/[Nd]=162(molar ratio), 60 ℃, 6 h, the yield of the polymerization is over 90%, the molecular weight of the polymer is 1.0×10 5~1.5×10 5. The polymerization rate is of first order with both monomer concentration and (Nd) concentration. The apparent polymerization activation energy E a is 32.5 kJ/mol.