不同氯代物及烷基铝对稀土体系催化丁二烯聚合的影响

Effects of Different Chloride and Aluminium Alkyl on Butadiene Polymerization with Rare Earth Catalyst System

讨论了不同氯代物及烷基铝对丁二烯聚合的影响，以及不同的Ｃｌ／Ｎｄ比与活性、顺丁胶微观结构之问的关系。发现Ｎｄ（ｎａｐｈ）３—氯代物—烷基铝体系的活性顺序为：ＡｌＥｔ２Ｃｌ，Ａｌ（ｉ—Ｂｕ）２Ｃｌ，倍半异丁基氯化铝＞氯硅烷≥烯丙基氯；Ａｌ（ｉ—Ｂｕ）３》ＡｌＥｔ３；Ｃｌ／Ｎｄ比在３．５～７范围内活性几乎不变；不同氯代物、烷基铝及Ｃｌ／Ｎｄ比对产物的微观结构无明显影响，但对特性粘度［η］（高聚物的分子量）影响较大。

The effects of different chloride and aluminium alkyl on butadiene polymerization and the relationship between the ratio of Cl/Nd and the activity and microstructure were studied. The order of the activity of Nd (Naph)3 -chloride-cluminium catalyst system is AlEt2Cl, Al (i- Bu)2Cl,Ala(i- Bu )3 Cl≥(CH3 )4-n SiCln(n = 1,2,3,4)>CH2= CH-CH2Cl and Al (i-Bu)3>>AlEt3.When the ratio of Cl/Nd ranged from 3. 5 to 7,the activity hardly changed,Variation of chloride, aluminum and ratio of Cl/Nd had no apparent effect on PB microstructure,but its effect on [η]was noticeable.