文/黄付玲，高宇新，孙树坤，曹媛媛，李文鹏，郭桂悦
中国石油天然气股份有限公司大庆化工研究中心摘要：
介绍了乙烯聚合法生产聚乙烯蜡常用的催化剂和工艺。高压自由基聚合法得到的产品结晶度低，熔点低，对颜料和填料的润湿性好，但相对分子质量分布较宽，难以控制产品质量。采用齐格勒-纳塔催化剂可以调节产物的相对分子质量和结晶度，制备的产品性能优良。使用茂金属催化剂制备聚乙烯蜡的优点是支链含量少，密度可调，相对分子质量分布窄，产品熔点高，缺点是成本太高。采用非茂金属催化剂制备聚乙烯蜡的条件比较温和，生产成本较低。今后，我国重点发展合成法制备聚乙烯蜡的技术，以及提高产品质量和性能指标，提升我国聚乙烯蜡品牌的竞争力。
关键词：聚乙烯蜡 齐格勒-纳塔催化剂 茂金属催化剂 非茂金属催化剂Research progress in preparation of polyethylene wax via ethylene polymerizationHuang Fuling，Gao Yuxin，Sun Shukun，Cao Yuanyuan，Li Wenpeng，Guo Guiyue（Daqing Petrochemical Research Center of CNPC，Daqing 163714，China）Abstract：
Several catalysts and processes commonly used in the production of polyethylene wax via ethylene polymerization are introduced. The products obtained by high-pressure free radical polymerization have low crystallinity and melting point，good wettability to pigments and fillers，wide relative molecular mass distribution，while whose qualities are difficult to control. Ziegler-Natta catalyst can be used to adjust the relative molecular mass and crystallinity of the products and obtain better properties.The polyethylene wax prepared with metallocene catalyst contains a smaller amount of branched chains，which has adjustable density，narrow molecular weight distribution and high melting point. The disadvantage of the process is high cost. The polymerization conditions fo rpreparing polyethylene wax with non-metallocene catalyst are relatively mild and the operation cost is relatively low. In the future，China will focus on developing the technology of preparing polyethylene wax by synthetic method，improving product quality and performance indicators，enhancing the competitiveness of polyethylene wax brands.
Keywords：polyethylene wax；Ziegler-Natta catalyst；metallocene catalyst；non-metallocene catalyst
