辛烯/十二烯共聚物的合成及其抗剪切性能  

SYNTHESIS OF DODECENE/OCTENE COPOLYMER AND ITS SHEAR-RESISTANT STABILITY

作　　者：赵梦奇[1] 王金勋[1] 殷德刚[1] 司马义.努尔拉 

机构地区：[1]新疆大学化学化工学院,新疆乌鲁木齐830046

出　　处：《精细石油化工》2009年第2期48-51,共4页Speciality Petrochemicals

基　　金：新疆维吾尔自治区高技术开发项目(200416117)

摘　　要：采用本体聚合法，以TiCl4／Al（i-Bu）3催化共聚1-辛烯／1-十二烯，合成了超高相对分子质量的油溶性聚合物。用^1H NMR和GPC表征共聚物的构成和相对分子质量及其分布。研究了辛烯加入量对共聚物相对分子质量以及抗剪切稳定性的影响，考察了超声剪切对共聚物相对分子质量分布的影响。结果表明，在最佳聚合条件（十二烯用量50mL、辛烯用量10mL、TiCl4用量0．0157g、Al（i-Bu）3用量0．2mL、反应温度0℃，反应时间48h）下，共聚物的Mw=7．82×10^6，分散度D=1．98；辛烯用量对共聚物的相对分子质量有明显影响，但分散度变化幅度不大（Mw／Mn=1．8～2．5）；辛烯用量对提高共聚物的抗剪切性能无明显作用；共聚物被超声剪切后，其相对分子质量分布为双峰分布，不属于拓扑断裂模型。A kind of oil-soluble copolymer of ultra high relative molecular mass was synthesized with 1- dodecene and 1-octene as monomers by bulk polymerization using TiCl4/Al（i-Bu）3 as catalyst. The structure and relative molecular mass of the copolymer were characterized by ^1H NMR and GPC. Influences of 1-dodecene content on the relative molecular mass and shear-resistant property of the copolymer and the ultrasonic shearing on the relative molecular mass distribution of the copolymer were studied. Under the optimum conditions, i. e. , 1-dodecene 50 mL, 1-octene 10 mL, catalyst 0. 015 7 g, co-catalyst 0.2 mL, temperature 0℃ and polymerization time 48 h, the weight-average relative mo- lecular mass and dispersity of the polymer were 7.82 × 10^6 and 1.98, respectively. The dosage of 1-octene could significantly influence the relative molecular mass of the copolymer, but the distribution remained almost unchanged （Mw/Mn= 1.8 -2.5） . 1-Dodecene content did not enhance the shear-resistant property of the copolymer. The MWD of the copolymer exhibited bimodality after ultrasonic shearing, not belonging to the topological scission model.

关 键 词：1-辛烯 1-十二烯 共聚物 相对分子质量及其分布 抗剪切性能 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]