改进型中乙烯基聚丁二烯橡胶的研制 Ⅳ.丁二烯聚合动力学

Preparation of developed medium vinyl polybutadiene rubberⅣ. Polymerization kinetics of butadiene

对ｎ－ＢｕＬｉ／ＧＤＥＥ（醚类微观结构调节剂）／环己烷体系丁二烯聚合动力学进行了研究。发现ＧＤＥＥ的加入提高了聚合速率，随ＧＤＥＥ／Ｌｉ（摩尔比）增大和反应温度的升高，反应速率加快；单体浓度与聚合速率呈一次方关系；在５０℃，ＧＤＥＥ／Ｌｉ为１．４时，引发剂浓度与聚合速率呈一次方关系。当ＧＤＥＥ／Ｌｉ为１．４时，聚丁二烯基锂几乎完全解缔为单量体。

The polymerization kinetics of butadiene was studied in the system of n-BuLi/GDEE (structure regulator)/cyclohexane.It was found that the addition of GDEE increased the rate of polymerization,the polymerization rate increased with the increase of GDEE/Li(mole ratio)and the polymerization temperature,the monomer concentration was linear with the rate of polymerization.The initiator concentration was linear with the rate of polymerization at 50 ℃ in the mole ratio of GDEE/Li 1.4.