摘要
在不同二苯基二甲氧基硅烷(DDS)用量、聚合温度及聚合时间等条件下,考察DDS对α-烯烃聚合载体型催化体系活性中心的影响。用聚合反应动力学和相对分子质量分布分峰拟合方法考察活性中心的分布。结合室内模拟环道评价装置,测定聚合物的减阻性能,确定DDS作为外给电子体对聚合活性中心数量和分布的调变作用。研究结果表明,在n(A l)∶n(Ti)=150、DDS用量0.3mL、聚合温度5℃、聚合时间24h的条件下,聚合物的减阻率达52%,可满足工业需要。
Effect of external electron donor dirnethoxydiphenylsilane （DDS）on active centers of catalytic system for α-olefin polymerization was systematically studied by varying DDS dosage, polymerization temperature and time. Distributions of active center were investigated by polymerization kinetics and fitting curves of relative molecular mass distribution of polymer with multiple Flory functions. By determining drag reduction efficiency of polymer in a simulative loop evaluation apparatus, effects of DDS as external electron donor on number and distribution of active centers were confirmed. Drag reduction efficiency of the polymer could reach 52% when conditions were：n（Al） ： n（Ti） =150,DDS 0.3 mL,temperature 5℃ and time 24 h. The polymer could meet industrial demand.
出处
《石油化工》
CAS
CSCD
北大核心
2005年第8期744-748,共5页
Petrochemical Technology
基金
2004年自治区高技术研究发展计划项目
关键词
二苯基二甲氧基硅烷
活性中心
烯烃聚合
催化体系
减阻
dimethoxydiphenylsilane
active center
olefin polymerization
catalytic system
drag reduction
