Nickel catalysts for the synthesis of ultra-high molecular weight polyethylene

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2020,（14）
• 页码范围: 1137-1138
• 页数: 2页
• 语种: 英文

摘要

Ziegler and Natta won the Nobel Prize in 1963 due to their contributions in olefin polymerization catalysis.Subsequent studies into related catalysts have led to a multibillion-dollar polyolefin industry.Currently,more than 178 million tons of polyolefin materials are produced annually,which constitute more than half of global plastics production.Interestingly,the metal nickel was initially recognized as a "poison" for olefin polymerization.Alkyl aluminum species can oligomerize ethylene (degree of polymerization up to 100) at high temperature and pressure;while the addition of nickel salt to the system led to the exclusive formation of 1-butene.