α-己烯/α-辛烯/α-十二烯三元聚合物特性黏数研究

A RESEARCH OF INTRINSIC VISCOSITY OF α-HEXYLENE/α-OCTENE/α-DODECENE TERPOLYMER

采用本体聚合法,以TiCl4/Al(Et)3为复合催化剂、α-烯烃为单体,合成α-己烯/α-辛烯/α-十二烯三元聚合物,考察反应条件对聚合物特性黏数的影响。采用FT-IR,1 H-NMR,XRD等表征手段对聚合物结构进行表征。结果表明,在主催化剂TiCl4用量0.095g、助催化剂Al(Et)3用量0.12mL、聚合温度-3℃、V(α-十二烯)∶V(α-辛烯)∶V(α-己烯)为4∶2∶1(单体总体积40mL)、聚合时间48h的最佳聚合条件下,聚合物的特性黏数达到15.40dL/g。表征结果表明:聚合物可以看成是拟合成的物质,经乙醇洗涤后可以得到基本不含单体的烯烃聚合物;合成的聚合物为结晶度较低的α-烯烃聚合物。

A terpolymer of α-hexylene/α-octene/α-dodecene was synthesized by bulk polymerization using TiCl4/Al（Et）3 composite catalyst and α-olefin monomers.Effects of polymerization conditions on the intrinsic viscosity of polymer were investigated.The experimental results showed that under the optimum polymerization conditions of using 0.095 g of main catalyst TiCl4 and 0.12 mL of co-catalyst Al（Et）3,V（α-dodecene）∶V（α-octene）∶V（α-hexylene）=4∶2∶1（total monomers volume of 40 mL）,reaction temperature of-3 ℃ and reaction time of 48 h,the intrinsic viscosity of the synthesized polymer could be up to 15.40 dL/g.The characterization results by FT-IR,XRD and 1H-NMR showed that after alcohol washing,the synthesized polymer was free of monomers,and it was the objective α-olefin polymer with low crystallinity to be used as drag reduction agent.