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用BPZ-N催化剂研究了共聚单体1-丁烯中乙腈含量分别为0,0.00035%(V),0.00069%(V),0.00123%(V),0.00176%(V)时对乙烯与1-丁烯共聚活性的影响。结果表明:当乙腈含量在0.00035%(V)以上时,随乙腈含量的增加,催化剂活性呈直线下降趋势,当达到0.00176%(V)时,活性保有率已不足不含乙腈时的50%。