给电子体MgCl_2对聚α-烯烃溶液聚合的影响

Effect of Electron Donor MgCl_2 on Polymerization of Drag Reducer with α-olefin

在不同的给电子体MgCl2的、用量聚合温度、聚合时间等条件下,考察MgCl2对聚α-烯烃溶液聚合的影响.结合室内模拟环道评价装置和凝胶渗透色谱仪,测定聚合产物的减阻性能,确定给电子体MgCl2对聚合活性中心数量和分布的调变作用及反应时间的影响.研究结果表明:在n(Al)/n(Ti)=80、α-烯烃∶正庚烷=2∶3(体积比)、起始温度0℃、MgCl2用量0.3 g、二苯基二甲氧基硅烷(DDS)=0.25 mL、聚合时间24小时的条件下,聚合产物的减阻率达到48%,减阻率比较稳定,能用于工业原油的输送.

Effect of electron donor magnesium chloride anhydrous （MgCl2） on drag reduction efficiency of α-olefin polymers is studied by varying conditions of MgCl2 in dosage polymerization, temperature and time. By determining drag reduction efficiency of polymers in a simulative loop evaluation apparatus and GPC, effects of MgCl2 as an electron donor on number and distribution of an active center are confirmed. Drag reducing test indicate that the drag reduction efficiency of polymers can achieve 48% ,when conditions are： n （ Al）/n （ Ti ） = 80, start temperature 0℃, MgCl2 0. 3g, α-olefin/n-heptane = 2/3 （ volume ratio） dimethoxydiphenylsilane （DDS）0. 25mL and time 24h. The polymer could meet industrial demand for crude oil transportation.