环戊二烯/α-烯烃共聚型减阻剂的合成

以TiC13/AlEt2Cl为引发体系，采用本体聚合法引发环戊二烯/α-辛烯/α-十二烯的聚合制备高减阻性能的共聚型减阻剂。考察单体水含量和组成、催化剂添加量、聚合温度、聚合时间对聚合反应的影响，并采用减阻剂室内环道评价装置测试减阻剂的减阻性能。实验结果表明，在单体水质量分数小于30 μg/g、n(环戊二烯): n (α-辛烯) : n（α-十二烯）=1:1:1、TiC13添加量3 mg/L、n(TiC13):n(AlEt2Cl) =1:25、聚合温度5 ℃左右、反应时间72 h 、室温放置2 天时，所合成的共聚型减阻剂的重均相对分子质量为6 400 000，在环道中添加质量浓度为10 mg/L的减阻剂时，减阻率达到48.3%。

STUDY ON SYNTHESIS OFCYCLOPENTADIENE/α-OLEFIN COPOLYMER TYPE DRAG REDUCING AGENT

A high performance drag reduction agent was synthesized by bulk polymerization of cyclopentadiene/α-octene /α-dodecene using TiCl3/AlEt2Cl as trigger. The impact factors on polymerization were investigated, such as pretreatment of raw materials, raw material composition and temperature. After the polymerization conducted under the conditions: water content of raw materials less than 30ppm; mole ratio of n(cyclopentadiene): n(α- octane): n(α- dodecene )=1:1:1; TiCl3 3 mg/L; mole ratio of n(TiC13):n(AlEt2Cl)=1:25，reaction temperature 0-5 ℃, reaction time 72 h, the reaction product was placed at room temperature for 2 days , the polymer molecular weight can be up to 6.4×106. The results of loop drag-reduction test of the agent indicate that drag reduction rate for diesel reaches to 48.3% at 10mg/L the polymer concentration.