聚烯烃铬系催化剂铝改性的应用研究进展

摘要

Since chrome catalyst invented by Phillips company,it has been a hot research topic in the field of olefin polymerization.The research status, preparation methods, properties of chromium catalyst modified by alumina and its effect o on the ethylene polymerization are described.After modified, the polymerization activity and hydrogen sensitivity of chromium catalyst was improved significantly.The polymer obtained from the catalyst has broader molecular weight distribution, better environmental stress cracking resistance and excellent processing properties.%自Phillips公司发明铬系催化剂以来，其一直是烯烃聚合领域的研究热点。本文综述了铬系催化剂在铝改性方面的研发现状、制备方法以及对乙烯聚合性能的影响。改性后的铬系催化剂聚合活性和氢调敏感性明显提高，生成聚合物的相对分子质量分布变宽，耐环境应力开裂性能改善，产品加工性能优异。