为了降低茂金属催化体系中助催化剂的成本,促进功能聚烯烃材料的研究开发,对乙基改性的甲基铝氧烷(EMMAO)助催化乙烯聚合进行了研究.分别采用三乙基铝(TEA)/甲基铝氧烷(MAO)、乙基铝氧炕(EAO)/MAO和EMMAO作助催化剂,考察了茂金属催化作用下的乙烯聚合.结果表明:当溶液中TEA/MAO摩尔比小于0.2时,TEA的存在能使MAO的活性有所上升;当EMMAO中Et/Me摩尔比小于0.32时,EMMAO的助催化性能与MAO相当.用EMMAO代替昂贵的MAO,有助于降低茂金属催化剂的成本,促进功能化聚烯烃的发展.
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