摘要
用膨胀计研究了Ｎｄ（ＯＰｒｉ）２Ｃｌ－ＡｌＥｔ３均相稀土催化剂异戊二烯聚合动力学．在实验条件下，本体系显示稳态聚合特征；聚合速度对单体浓度和催化剂浓度均为一级关系，即聚合速度方程为Ｒｐ＝Ｋｐ［Ｎｄ］［Ｍ］；本体系总的活化能Ｅａ为５７．４ｋＪ／ｍｏｌ．
he kinetics of the polymerization of isoprene with a soluble rare earth catalyst system Nd(OPri)2Cl-AlEt3 has been examined in a specially designed dilatometer.The polymerization process was characterized by a steady-state reaction within the experimental range, and polymerization rate is first order in both the concentration of neodymium compound and monomer,that is,Rp =-d[M]/dt=Kp[Nd][M].The apparent activation energy of isoprene polmerization has been found to be 57.4KJ/mol in heptane.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1995年第5期548-553,共6页
Acta Polymerica Sinica
基金
国家自然科学基金
关键词
聚异戊二烯
催化剂
稀土催化剂
铰
镨
Kinetics,Polyisoprene,Homogeneous catalyst, Rare earth catalyst
