摘要
改型镍系Ni(naph)_2-Al(i-Bu)_2OC_8H_(17)-BF_3·OEt_2的电子顺磁共振谱指出,活性中心主要由Ni(Ⅰ)组成,预混丁二烯能稳定Ni(Ⅰ)和缩短聚合反应的诱导期,但不改变聚合反应的表观活化能。
The ESR spectrum of the retrofit nickel catalyst system showed that the active center consists of Ni(I) in the system and that the premix of Bd with nickel naphthenate before adding Al(i-Bu)2OC8H17 and BF3OEt2 to the system leads to stabilization of the Ni(I) complexes and the induced period of polymerization of butadiene shorter. The overall energy of polymerization of butadiene do not change.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1990年第5期549-553,共5页
Acta Polymerica Sinica
基金
国家自然科学基金
关键词
镍系催化剂
聚丁二烯
活性中心
ESR
ESP, Retrofit nickel catalyst system, Cis-1,4-polybutadiene, Active center
