Pei Lixia, Tang Yong, Gao Haiyang
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610550, China.
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China.
Polymers (Basel). 2016 Mar 1;8(3):69. doi: 10.3390/polym8030069.
A series of anilido⁻imine chromium complexes have been used as precursors to catalyze homo- and copolymerization of ethylene and norbornene. The chromium complexes activated with methylalumoxane (MAO) exhibit good activities for homopolymerization of ethylene (E) to produce linear polyethylene and moderate activities for norbornene (N) polymerization to afford vinyl-type polynorbornene. Ethylene⁻norbornene copolymers with high incorporation of norbornene can be also produced by these catalysts. C NMR and differential scanning calorimetry (DSC) analyses show that the copolymers are random products, and ⁻NNN⁻ and ⁻EEE⁻ units can be observed in the microstructure of the copolymers.
一系列苯胺基-亚胺铬配合物已被用作催化剂前体，用于催化乙烯和降冰片烯的均聚和共聚反应。用甲基铝氧烷（MAO）活化的铬配合物对乙烯均聚生成线性聚乙烯表现出良好的活性，对降冰片烯聚合生成乙烯基型聚降冰片烯表现出中等活性。这些催化剂还可以制备降冰片烯含量高的乙烯-降冰片烯共聚物。碳核磁共振（¹³C NMR）和差示扫描量热法（DSC）分析表明，该共聚物是无规产物，并且在共聚物的微观结构中可以观察到-⁻NNN⁻和-⁻EEE⁻单元。
