钕系催化剂合成高顺式窄分布聚丁二烯  

Synthesis of Polybutadiene with High cis-1,4 Content and Narrow Molecular Weight Distribution by Nd-Based Catalyst

作　　者：刘贤光[1] 张春庆[1] 胡雁鸣[1] 张学全[2] 

机构地区：[1]大连理工大学化工学院高分子材料系,辽宁大连116012 [2]中国科学院长春应用化学研究所,吉林长春130022

出　　处：《高分子材料科学与工程》2013年第6期28-31,36,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(20974016)

摘　　要：以新癸酸钕(简称Nd)/氢化二异丁基铝(简称Al)/氯化二乙基铝(简称Cl)为催化剂进行了丁二烯(简称Bd)聚合。考察了催化剂配制时不同Bd用量、[Al]/[Nd]、[Cl]/[Nd]、聚合温度和时间对Bd聚合的影响。结果表明:催化剂配制时,随Bd用量的增加,催化活性升高,相对分子质量分布变窄。聚合物产率在[Al]/[Nd]比值很低([Al]/[Nd]=10)时即可达到100%。所得聚合物具有高相对分子质量(-Mn=44×104),窄的相对分子质量分布(1.47),高cis-1,4结构含量(98.3%)。聚合物的微观结构基本不受反应条件的影响,显示该催化剂具有高的稳定性和立体定向性。The polymerization of butadiene was catalyzed by Nd （vers）3/A1H （i-Bu）2/AIEt2Cl. The effects of [Bd]/[Nd] ratio in catalyst preparation, [Al]/[Nd] and [Cl]/[Nd] ratios, and polymerization temperature and time on butadiene polymerization were investigated. The increment of butadiene addition amount in catalyst preparation resulted in the higher catalytic activity and narrower molecular weight distribution of the copolymer.The polymer yield reaches 100% even at low [Al]/[Nd] ration of 10. The polymer has high molecular weight （M, = 44×10^4）, molecular weight distribution （^-Mw/^-Mn = 1. 47）, and high cis-1, 4 stereoregularity of 98. 3%, respectively. Regardless of reaction conditions, the microstructure of the polymer hardly changes, indicating the high stability and stereospecificity of the catalyst.

关 键 词：钕系催化剂 丁二烯 聚丁二烯 

分 类 号：TQ314.242[化学工程—高聚物工业]